OBSERVED MINIMA TIMINGS
OF ECLIPSING BINARIES
NUMBER 9
Prepared by:
Marvin E. Baldwin
Chairman, AAVSO
Eclipsing Binary
Committee
Gerard Samolyk
AAVSO Eclipsing
Binary Committee
August 2004
Funds for publication were provided by
The Harold S. Martin Fund.
ISBN 1-878174-68-1
COPYRIGHT 2004
The American Association of Variable Star Observers
25 Birch Street
Cambridge, MA 02138
USA
All rights reserved. No part of this book may be reproduced by any mechanical, photographic, or
electronic process, nor may it be stored on an information retrieval system, transmitted, or otherwise
copied for public or private use, without the written permission of the American Association of Variable
Star Observers.
ii
TABLE OF CONTENTS
Introduction ................................................................................................................................................. v
References .................................................................................................................................................. vi
Table 1. Publications Containing Previous AAVSO Minima for Each Star in this Monograph .............. vii
Table 2. Information on O-C Minima and Linear Elements .................................................................... viii
Table 3. Observers Contributing to this Monograph ................................................................................. ix
Compilation of Times of Minima and O-C Diagrams ................................................................................ 1
iii
iv
INTRODUCTION
This compilation contains 708 minima timings of 50 eclipsing binary stars. It represents a portion of the
stars observed by participants in the AAVSO's eclipsing binary program since 1976, and continues the
listing of minima published in Observed Minima Timings of Eclipsing Binaries Nos. 1 through 8. Except
where otherwise specified, all minima are determined from visual observations reduced by the authors
using a computerized tracing paper method. Ron Baldwin and Gerard Samolyk wrote the tracing paper
software specifically for this purpose.
Some CCD observations were reduced by the observers using the method of Kwee and Van Worden
(1957). The standard error is included in each of these cases.
In instances where fragments of eclipses are observed during different cycles, the data points are reduced
to heliocentric phase and combined into a single light curve for the tracing paper process. In these cases,
the listed time of minimum is the eclipse nearest to the midpoint of the observing interval that
corresponds to the calculated phase of minimum light. A footnote is added to these listings indicating the
observing interval in JD.
The linear elements in the General Catalogue of Variable Stars (Kholopov et al. 1985) were used to
compute the cycle and O-C for each time of minimum. All elements used in this publication are listed in
Table 2. The number of observations used for determination of each time of minimum is given under N.
This work is sponsored by the AAVSO, with Marvin Baldwin acting as program coordinator.
The O-C diagrams accompanying the minima listings represent not only the minima tabulated here but
also all previously published minima associated with the AAVSO program. Times of minimum obtained
electronically that have four place accuracy are circled on the O-C diagrams. The years spanned by these
diagrams are listed by star in Table 2, with the second column giving the year of the earliest observation
appearing in the diagram and the third and fourth columns listing the earliest and latest year of the minima
tabulated in this publication.
The material in this monograph may be accessed electronically via the AAVSO web site home page
(http://www.aavso.org) or the AAVSO ftp site (ftp.aavso.org in /pub/monographs).
Observers contributing data used in this publication are listed in Table 3. Their dedicated efforts are
greatly appreciated.
Marvin E. Baldwin
8655 N Co. Rd. 775E
Butlerville, IN 47223
USA
Gerard Samolyk
9504 W Barnard Ave.
Greenfield, WI 53228
USA
v
REFERENCES
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Ashbrook, J. 1963, Sky & Telescope, 25, 5,277.
Ashbrook, J. 1963, Sky & Telescope, 26, 3,153.
Ashbrook, J. 1964, Sky & Telescope, 27,1, 58.
Ashbrook, J. 1964, Sky & Telescope, 27, 5, 317.
Ashbrook, J. 1964, Sky & Telescope, 28, 10, 244.
Ashbrook, J. 1965, Sky & Telescope, 29, 4, 254.
Robinson, L. J. 1965, Inf. Bull. Var. Stars, No. 111.
Robinson, L. J. 1965, Inf. Bull. Var. Stars, No. 114.
Robinson, L. J. 1965, Inf. Bull. Var. Stars, No. 119.
Robinson, L. J. 1966, Inf. Bull. Var. Stars, No. 129.
Robinson, L. J. 1966, Inf. Bull. Var. Stars, No. 154.
Robinson, L. J. 1967, Inf. Bull. Var. Stars, No. 180.
Robinson, L. J. 1967, Inf. Bull. Var. Stars, No. 221.
Robinson, L. J., and Ashbrook, J. 1968, Inf. Bull. Var. Stars, No. 247.
Baldwin, M. E. 1973, Inf. Bull. Var. Stars, No. 795.
Baldwin, M. E. 1974, J. Amer. Assoc. Var. Star Obs., 3, 60.
Baldwin, M. E. 1975, J. Amer. Assoc. Var. Star Obs., 4, 86.
Baldwin, M. E. 1976, J. Amer. Assoc. Var. Star Obs., 5, 29.
Baldwin, M. E. 1976, J. Amer. Assoc. Var. Star Obs., 5, 84.
Baldwin, M. E. 1977, J. Amer. Assoc. Var. Star Obs., 6, 24.
Baldwin, M. E. 1978, J. Amer. Assoc. Var. Star Obs., 7, 28.
Baldwin, M. E., and Samolyk, G. 1993, Observed Minima Timings of Eclipsing Binaries No. 1,
AAVSO, Cambridge, MA.
Baldwin, M. E., and Samolyk, G. 1995, Observed Minima Timings of Eclipsing Binaries No. 2,
AAVSO, Cambridge, MA.
Baldwin, M. E., and Samolyk, G. 1996, Observed Minima Timings of Eclipsing Binaries No. 3,
AAVSO, Cambridge, MA.
Baldwin, M. E., and Samolyk, G. 1997, Observed Minima Timings of Eclipsing Binaries No. 4,
AAVSO, Cambridge, MA.
Baldwin, M. E., and Samolyk, G. 1999, Observed Minima Timings of Eclipsing Binaries No. 5,
AAVSO, Cambridge, MA.
Baldwin, M. E., and Samolyk, G. 2000, Observed Minima Timings of Eclipsing Binaries No. 6,
AAVSO, Cambridge, MA.
Baldwin, M. E., and Samolyk, G. 2002, Observed Minima Timings of Eclipsing Binaries No. 7,
AAVSO, Cambridge, MA.
Baldwin, M. E., and Samolyk, G. 2003, Observed Minima Timings of Eclipsing Binaries No. 8,
AAVSO, Cambridge, MA.
Kholopov, P. N., et al. 1985, General Catalogue of Variable Stars, Fourth Edition, Moscow.
Kwee K. K., and Van Worden, H. 1957, Bull. Astron. Inst. Netherlands, 12, 327.
vi
TABLE 1
1
RT
XZ
AD
BD
OO
RY
WW
AR
CL
EP
UW
VW
YY
TY
RZ
TW
IS
V375
V380
SU
WZ
EG
ZZ
V401
YY
YY
RW
SZ
TT
AV
DI
DG
T
BB
ER
TY
UX
BX
AE
U
RS
CC
TY
X
RV
W
TX
AK
AW
BO
And
And
And
And
Aql
Aur
Aur
Aur
Aur
Aur
Boo
Boo
CMi
Cap
Cas
Cas
Cas
Cas
Cas
Cep
Cep
Cep
Cyg
Cyg
Del
Eri
Gem
Her
Her
Hya
Hya
Lac
LMi
Mon
Ori
Peg
Peg
Peg
Phe
Sge
Ser
Ser
Tau
Tri
Tri
UMa
UMa
Vir
Vir
Vul
2
3
X
X
X
4
5
6
X
X
7
X
8
X
X
9
X
X
X
X
X
X
X
X
X
X
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
X X X X X X
X X X X X X
X
X
X
X X X X
X X X X X X
X
X
X
X X
X X
X X X X X X
X
X
27 28 29
X X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
This table identifies publications in which previous AAVSO minima for each star have been published. The
numbers across the top of the table correspond to those given at the beginning of each entry in the References.
vii
TABLE 2
RT
XZ
AD
BD
OO
RY
WW
AR
CL
EP
UW
VW
YY
TY
RZ
TW
IS
V375
V380
SU
WZ
EG
ZZ
V401
YY
YY
RW
SZ
TT
AV
DI
DG
T
BB
ER
TY
UX
BX
AE
U
RS
CC
TY
X
RV
W
TX
AK
AW
BO
And
And
And
And
Aql
Aur
Aur
Aur
Aur
Aur
Boo
Boo
CMi
Cap
Cas
Cas
Cas
Cas
Cas
Cep
Cep
Cep
Cyg
Cyg
Del
Eri
Gem
Her
Her
Hya
Hya
Lac
LMi
Mon
Ori
Peg
Peg
Peg
Phe
Sge
Ser
Ser
Tau
Tri
Tri
UMa
UMa
Vir
Vir
Vul
Earliest
Minimum
Earliest
Listing
Latest
Listing
1963
1950
1976
1976
1960
1977
1962
1965
1977
1975
1977
1977
1977
1976
1961
1976
1977
1976
1977
1977
1977
1966
1965
1977
1966
1968
1970
1959
1977
1975
1978
1976
1966
1978
1968
1968
1967
1976
1994
1965
1981
1977
2000
1960
1975
1966
1966
1977
1978
1976
2002
2000
1997
1996
2001
1977
2000
1998
1977
1995
1996
1998
1977
1976
2002
1976
1977
1976
1977
1996
1996
2002
2000
1977
2000
2002
1996
2002
1977
1992
1978
1976
1996
1978
2002
1995
1976
1996
1994
1993
1981
1977
2000
2002
2000
1999
1996
1977
1978
1999
2004
2003
2004
2004
2004
2004
2003
2004
2004
2004
2003
2004
2004
2003
2004
2003
2003
2003
2003
2004
2004
2004
2003
2004
2003
2004
2003
2004
2004
2004
2004
2004
2004
2004
2004
2003
2002
2003
2003
2003
1999
2004
2004
2004
2002
2004
2004
2004
2004
2003
Epoch
2400000 +
Period
(Days)
41141.88902
23977.1915
39002.4516
34962.400
38613.2222
38289.563
32945.53930
38402.1832
32967.262
26309.382
42404.713
31173.406
28023.147
44793.452
43200.3063
42008.3873
28776.263
34642.255
25645.505
26325.465
28040.556
42594.3825
45000.3570
43835.259
42959.512
41581.624
18302.655
41864.30517
39995.908
36673.376
31194.131
44509.387
45397.368
26681.5628
41626.415
40451.784
40425.479
44195.3771
43732.8819
17130.4114
34921.838
37481.570
21192.395
42502.721
46033.308
45765.7385
44998.1475
42576.408
45022.645
35989.431
0.628929513
1.357278
0.9861958
0.4629023
0.50678848
2.725391
2.52501922
4.134695
1.2443645
0.5910080
1.0047108
0.3423253
1.0940197
1.4234498
1.195247
1.4283240
1.8415124
1.47338431
1.357273
0.9014011
0.4174471
0.54462183
0.62861644
0.5827220
0.7930922
0.32149415
2.8654972
0.81809828
0.91207546
0.6834062
0.6147132
2.206534
3.019885
0.7326988
0.4233987
3.092220
1.544617
0.2804208
0.362377
3.38061933
0.598140369
0.5160062
1.0773555
0.9715352
0.75366648
0.33363749
3.0632382
1.1935981
0.35399695
1.945869
The O-C diagrams for each star contain the minima spanning the years in columns two and four. The listing of new
minima spans the years in columns three and four. The fifth and sixth columns contain the linear elements used to
calculate the O-C values in this publication. All of these elements are from the General Catalogue of Variable Stars
(Kholopov et al. 1985) except where noted.
viii
TABLE 3
1)
W. Anthony
P. Atwood
Bal-Mai (CCD)
M. Baldwin
R. Berg
J. Bialozynski (CCD)
J. Blackwell (CCD)
N. Butterworth (CCD)
G. Chaple
S. Cook
S. Cook (CCD)
M. Csukas
S. Diesso (CCD)
S. Dvorak (CCD)
A. Filho
S. Foglia
H. Gerner (CCD)
P. Goodwin
G. Hanson
R. Hays
C. Hesseltine
C. Hesseltine (CCD)
R. Hill
J. A. Howell (CCD)
S. Jamieson (CCD)
S. Kracenicki
P. Kuebler (CCD)
1
1
9
50
2
7
1
1
10
6
23
1
1
51
1
20
2
2
5
19
2
14
24
5
1
3
1
C.
G.
A.
B.
B.
D.
J.
M.
M.
R.
R.
D.
A.
G.
G.
G.
R.
N.
N.
M.
C.
J.
G.
D.
D.
D.
Limbach (CCD)
Lubcke (CCD)
MacRobert
Manske
Manske (CCD)
Matsnev
McKenna
Nall
Nicholas (CCD)
Papini (CCD)
Poklar (CCD)
Ruokonen
Sajtz
Samolyk
Samolyk (CCD)
Sarty
Schmude
Simmons
Simmons (CCD)
Simonsen
Stephan
Virtanen
Wedemayer
Weier
Weier (CCD)
Williams
Total
1
12
1
7
1
1
4
1
2
1
7
2
1
181
117
3
4
1
2
6
48
3
4
3
1
31
708
47 Observers
1) CCD observations by the team of L. Baldinelli and A. Maitan
This table lists the observers and the number of minima contributed by each. CCD stands for ChargeCoupled Device.
ix
JD(min)
HEL.
2400000 +
52504.7541
52511.675
52544.375
52552.553
52569.535
52577.7089
52586.5141
52586.525
52589.6629
52609.7851
52931.7962
52994.688
53057.5818
CYCLE
O-C
N
18067
18078
18130
18143
18170
18183
18197
18197
18202
18234
18746
18846
18946
-0.0044
-0.002
-0.006
-0.004
-0.003
-0.0055
-0.0053
0.006
-0.0011
-0.0047
-0.0055
-0.007
-0.0058
1
21
12
14
11
16
132
66
12
82
28
33
17
27
OBSERVER
G.
M.
J.
C.
G.
M.
S.
C.
M.
G.
G.
G.
G.
Samolyk (CCD)
Simonsen
Virtanen
Stephan
Chaple
Nicholas (CCD)
Dvorak (CCD)
Stephan
Nicholas (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk
Samolyk (CCD)
STANDARD
ERROR
0.0002
0.0001
0.0001
0.0005
0.0001
0.0001
0.0001
JD(min)
HEL.
2400000 +
51874.790
51881.5782
52219.550
52223.620
52250.771
52497.800
52531.728
52531.732
52542.5899
52546.664
52580.595
52637.605
52934.842
52975.5716
52975.5716
52994.580
CYCLE
20554
20559
20808
20811
20831
21013
21038
21038
21046
21049
21074
21116
21335
21365
21365
21379
O-C
N
0.106
0.1083
0.118
0.116
0.121
0.126
0.122
0.126
0.1256
0.128
0.127
0.131
0.124
0.1356
0.1356
0.142
16
51
16
21
9
11
13
6
41
14
28
20
20
60
69
18
2
OBSERVER
R.
S.
G.
M.
M.
D.
R.
G.
G.
M.
G.
C.
R.
J.
S.
G.
Hill
Dvorak (CCD)
Samolyk
Baldwin
Simonsen
Williams
Hill
Sarty
Samolyk (CCD)
Baldwin
Chaple
Stephan
Hill
Bialozynski (CCD)
Dvorak (CCD)
Samolyk
STANDARD
ERROR
0.0004
0.0001
0.0001
0.0001
JD(min)
HEL.
2400000 +
50700.647 2)
51095.6217
51099.5669
51488.6216
51813.5869
52169.6114
52209.5536
52239.6333
52245.5511
52282.5341
52517.7443
52637.5654
52923.5681
53201.6737
2)
CYCLE
11862
12262.5
12266.5
12661
12990.5
13351.5
13392
13422.5
13428.5
13466
13704.5
13826
14116
14398
O-C
N
-0.059
-0.0559
-0.0555
-0.0550
-0.0412
-0.0334
-0.0322
-0.0314
-0.0308
-0.0301
-0.0276
-0.0293
-0.0234
-0.0250
20
77
46
49
86
72
68
55
65
60
45
19
57
50
OBSERVER
STANDARD
ERROR
S.
G.
G.
G.
G.
S.
S.
S.
G.
S.
G.
G.
G.
G.
0.0002
0.0008
0.0011
0.0002
0.0002
0.0001
0.0002
0.0004
0.0002
0.0005
0.0009
0.0004
0.0004
Cook (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Dvorak (CCD)
Dvorak (CCD)
Dvorak (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Observations combined from 50700 to 50701
3
JD(min)
HEL.
2400000 +
50370.591
51100.5766
51156.5923
51805.5745
52179.5983
52185.6164
52210.6135
52230.5180
52489.7406
52552.6952
52883.6728
52958.6636
53189.6545
CYCLE
33286
34863
34984
36386
37194
37207
37261
37304
37864
38000
38715
38877
39376
O-C
N
0.025
0.0137
0.0182
0.0114
0.0102
0.0105
0.0109
0.0106
0.0079
0.0078
0.0103
0.0109
0.0135
14
66
36
41
40
40
74
43
52
17
37
16
48
4
OBSERVER
STANDARD
ERROR
G.
G.
G.
G.
G.
S.
G.
S.
G.
S.
G.
S.
G.
0.0003
0.0003
0.0002
0.0003
0.0003
0.0004
0.0001
0.0003
0.0002
0.0002
0.0001
0.0004
Samolyk
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
52210.623
52223.551
52225.587
52426.770
52426.783
52426.784
52458.706
52472.3866
52489.6180
52496.706
52497.732
52561.583
52562.5961
52830.691
52833.732
52850.9624
52869.7139
52897.589
52915.5791
52918.629 :
52939.649
52968.532
53184.4336
53197.8621
CYCLE
26830.5
26856
26860
27257
27257
27257
27320
27347
27381
27395
27397
27523
27525
28054
28060
28094
28131
28186
28221.5
28227.5
28269
28326
28752
28778.5
O-C
N
0.012
0.017
0.026
0.014
0.027
0.028
0.023
0.0198
0.0204
0.013
0.026
0.021
0.0210
0.025
0.025
0.0246
0.0250
0.027
0.0258
0.035
0.023
0.019
0.0290
0.0276
13
12
18
14
10
18
15
19
29
17
12
13
42
16
15
271
55
18
36
10
14
12
100
27
5
OBSERVER
G. Samolyk
C. Stephan
G. Samolyk
N. Simmons
B. Manske
G. Samolyk
R. Hays
Bal-Mai (CCD)
G. Samolyk (CCD)
C. Stephan
D. Williams
R. Hays
G. Samolyk (CCD)
C. Stephan
D. Williams
N. Butterworth (CCD)
R. Poklar (CCD)
C. Stephan
R. Poklar (CCD)
C. Stephan
C. Stephan
R. Hays
R. Papini (CCD)
B. Manske (CCD)
STANDARD
ERROR
0.0008
0.0002
0.0001
0.0001
0.0001
0.0001
0.0002
0.0003
JD(min)
HEL.
2400000 +
43170.745
44598.856
46814.604
47539.564
49283.813
49373.749
49801.635
51488.657
51586.7686
52619.6913
53017.6032
CYCLE
1791
2315
3128
3394
4034
4067
4224
4843
4879
5258
5404
O-C
N
0.007
0.013
0.018
0.024
0.023
0.021
0.020
0.025
0.0229
0.0224
0.0272
17
18
20
14
19
17
18
15
49
49
27
6
OBSERVER
STANDARD
ERROR
G.
G.
G.
G.
G.
R.
G.
G.
G.
S.
G.
0.0003
0.0001
0.0003
Wedemayer
Samolyk
Samolyk
Samolyk
Samolyk
Hill
Samolyk
Samolyk
Samolyk (CCD)
Jamieson (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
51879.394
51904.647
51957.667
51986.710
52000.604
52023.316
52616.715
52640.693
52678.581
52986.628
52996.719
CYCLE
7498.5
7508.5
7529.5
7541
7546.5
7555.5
7790.5
7800
7815
7937
7941
O-C
N
-0.002
0.001
-0.005
0.001
0.007
-0.006
0.013
0.004
0.016
0.011
0.002
11
23
21
17
10
13
24
19
21
21
29
7
OBSERVER
S.
G.
G.
G.
R.
S.
G.
G.
G.
G.
G.
Foglia
Samolyk
Samolyk
Samolyk
Schmude
Foglia
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
JD(min)
HEL.
2400000 +
51157.643
51496.668
51496.679
51519.405
51550.385 :
51895.664
51957.686
51986.644
51986.647
51986.651
52253.311 :
52263.663
52662.646
52691.5846
52999.607
52999.626
53061.641
CYCLE
3085
3167
3167
3172.5
3180
3263.5
3278.5
3285.5
3285.5
3285.5
3350
3352.5
3449
3456
3530.5
3530.5
3545.5
O-C
N
-0.074
-0.094
-0.083
-0.098
-0.128
-0.096
-0.095
-0.080
-0.077
-0.073
-0.100
-0.085
-0.100
-0.1045
-0.117
-0.098
-0.103
8
11
22
14
31
17
20
21
11
9
16
9
24
25
145
16
23
17
OBSERVER
J.
M.
G.
S.
S.
G.
G.
D.
B.
G.
S.
G.
G.
G.
B.
G.
G.
McKenna
Baldwin
Samolyk
Foglia
Foglia
Samolyk
Samolyk
Weier
Manske
Samolyk
Foglia
Samolyk
Samolyk
Lubcke (CCD)
Manske
Samolyk
Samolyk
STANDARD
ERROR
0.0002
JD(min)
HEL.
2400000 +
43219.624
44957.981
46804.652
46814.611
47950.714
50521.608
50873.776
51570.6077
51871.748
52013.5998
52609.6521
52690.5364
52731.5986
52986.6982
53062.6057
CYCLE
8239
9636
11120
11128
12041
14107
14390
14950
15192
15306
15785
15850
15883
16088
16149
O-C
N
0.043
0.023
0.057
0.061
0.059
0.096
0.109
0.0964
0.101
0.0948
0.0965
0.0971
0.0952
0.1001
0.1014
14
29
19
17
19
28
20
38
20
54
44
11
40
66
42
9
OBSERVER
G.
G.
G.
G.
G.
G.
R.
G.
R.
G.
G.
G.
G.
G.
J.
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Chaple
Hill
Samolyk (CCD)
Hill
Samolyk (CCD)
Samolyk (CCD)
Lubcke (CCD)
Samolyk (CCD)
Samolyk (CCD)
Bialozynski (CCD)
STANDARD
ERROR
0.0003
0.0002
0.0001
0.0002
0.0007
0.0002
0.0002
JD(min)
HEL.
2400000 +
49754.668
50488.688
51160.667
51579.706
51582.640
51881.7128
51991.6361
52222.7248
52252.857
52296.6013
52316.685
52319.647
52689.6232
53046.5916
CYCLE
O-C
N
39670
40912
42049
42758
42763
43269
43455
43846
43897
43971
44005
44010
44636
45240
-0.001
-0.013
-0.010
0.004
-0.017
0.0056
0.0015
0.0060
-0.003
0.0065
-0.004
0.003
0.0081
0.0077
10
13
17
13
15
19
60
56
56
23
70
18
19
66
45
OBSERVER
G.
G.
G.
G.
G.
G.
S.
S.
G.
G.
G.
G.
G.
G.
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk (CCD)
Dvorak (CCD)
Dvorak (CCD)
Samolyk
Samolyk (CCD)
Samolyk
Samolyk
Lubcke (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0002
0.0003
0.0001
0.0002
0.0001
0.0005
JD(min)
HEL.
2400000 +
50277.633 :
50278.636
50280.643 :
50281.648
50284.677
50502.702
50703.623 :
51775.651
52416.6522
52844.6581
52849.6807
CYCLE
O-C
N
7836
7837
7839
7840
7843
8060
8260
9327
9965
10391
10396
0.006
0.004
0.002
0.002
0.017
0.020
-0.001
0.000
-0.0039
-0.0048
-0.0058
11
11
9
14
8
17
6
10
14
30
32
68
OBSERVER
STANDARD
ERROR
S.
D.
S.
S.
G.
S.
S.
D.
S.
R.
R.
0.0002
0.0005
0.0002
Cook (CCD)
Williams
Cook (CCD)
Cook (CCD)
Samolyk
Cook (CCD)
Cook (CCD)
Williams
Dvorak (CCD)
Poklar (CCD)
Poklar (CCD)
JD(min)
HEL.
2400000 +
50921.739
51309.771
51318.682
52042.692 :
52049.516 3)
52069.718
52077.757
52384.8175
52406.7249
52435.649
52785.6684
53176.7660
53185.6656
53197.6464
3)
CYCLE
57689
58822.5
58848.5
60963.5
60983.5
61042.5
61066
61963
62027
62111.5
63134
64276.5
64302.5
64337.5
O-C
N
-0.071
-0.065
-0.054
-0.062
-0.085
-0.080
-0.086
-0.0911
-0.0925
-0.095
-0.1031
-0.1121
-0.1130
-0.1136
19
11
20
4
31
18
16
17
26
16
63
36
50
31
OBSERVER
G.
M.
M.
D.
S.
B.
B.
S.
S.
C.
G.
G.
J.
H.
Samolyk
Baldwin
Baldwin
Weier
Cook
Manske
Manske
Dvorak (CCD)
Dvorak (CCD)
Stephan
Samolyk (CCD)
Samolyk (CCD)
Bialozynski (CCD)
Gerner (CCD)
Observations combined from 52045 to 52054
12
STANDARD
ERROR
0.0003
0.0003
0.0003
0.0002
0.0006
0.0002
JD(min)
HEL.
2400000 +
43190.640
43190.659
44238.711
44622.704
44622.716
45298.839
46122.605
49037.642
49416.7162
50096.642
50468.614
52662.6713
52708.6215
53035.7316
CYCLE
13864
13864
14822
15173
15173
15791
16544
19208.5
19555
20176.5
20516.5
22522
22564
22863
O-C
N
0.004
0.023
0.004
-0.004
0.008
0.027
-0.004
0.018
0.0140
0.007
0.012
0.0126
0.0140
0.0122
13
13
10
13
19
11
21
12
14
66
10
10
48
63
92
OBSERVER
G.
D.
G.
G.
G.
G.
S.
S.
G.
S.
S.
G.
G.
G.
Samolyk
Ruokonen
Samolyk
Hanson
Samolyk
Samolyk
Cook
Cook
Lubcke (CCD)
Cook (CCD)
Cook (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0008
0.0002
0.0001
0.0002
JD(min)
HEL.
2400000 +
43069.660
44101.657
45264.628
45876.719
47465.282
47688.778
50723.586
51486.557
52182.6213
52448.8090
52468.7365
52525.6747
52861.6140
CYCLE
-1211
-486
331
761
1877
2034
4166
4702
5191
5378
5392
5432
5668
O-C
N
0.006
0.002
0.014
0.022
0.015
0.029
0.042
0.044
0.0414
0.0440
0.0432
0.0434
0.0485
11
12
10
10
10
12
8
16
75
49
80
111
45
14
OBSERVER
STANDARD
ERROR
G.
G.
G.
G.
G.
G.
M.
G.
G.
G.
C.
C.
D.
0.0002
0.0006
0.0002
0.0002
0.0004
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Baldwin
Samolyk
Samolyk (CCD)
Samolyk (CCD)
Hesseltine (CCD)
Hesseltine (CCD)
Weier (CCD)
JD(min)
HEL.
2400000 +
52346.378
52352.358
52652.365
52664.314
52695.390
52799.384
52921.305
52959.549
52966.724
52982.261
52988.238
52996.607
53001.388
53044.407
CYCLE
7652
7657
7908
7918
7944
8031
8133
8165
8171
8184
8189
8196
8200
8236
O-C
N
0.042
0.045
0.045
0.042
0.042
0.049
0.055
0.051
0.054
0.053
0.054
0.056
0.056
0.046
23
13
24
10
14
9
24
25
23
9
7
18
13
16
15
OBSERVER
S.
S.
S.
S.
S.
A.
S.
G.
C.
S.
S.
G.
M.
S.
Kracenicki
Kracenicki
Foglia
Foglia
Foglia
Sajtz
Foglia
Chaple
Stephan
Foglia
Foglia
Samolyk
Csukas
Foglia
JD(min)
HEL.
2400000 +
43069.635
44133.748
44473.684
44473.689
44593.671
44623.651
46714.720
47161.781
48835.776
48885.768
49785.603
50442.628
50689.725
52860.7766
52919.326
52949.339
CYCLE
743
1488
1726
1726
1810
1831
3295
3608
4780
4815
5445
5905
6078
7598
7639
7660
O-C
N
0.003
0.015
0.009
0.014
0.017
0.002
0.005
0.001
0.000
0.001
-0.008
-0.013
-0.016
-0.0165
-0.028
-0.010
16
12
13
11
14
13
19
15
13
14
15
15
17
11
53
13
8
OBSERVER
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
S.
S.
S.
H.
S.
S.
Samolyk
Samolyk
Samolyk
Hanson
Samolyk
Hanson
Samolyk
Samolyk
Samolyk
Samolyk
Cook (CCD)
Cook (CCD)
Cook (CCD)
Gerner (CCD)
Foglia
Foglia
STANDARD
ERROR
0.0002
JD(min)
HEL.
2400000 +
43432.872
43701.739
43701.745
44191.589
44445.708
44957.658
46038.618
52522.6166
52616.5345
52616.5347
52708.6109
52951.6923
52975.6322
CYCLE
7959
8105
8105
8371
8509
8787
9374
12895
12946
12946
12996
13128
13141
O-C
N
0.012
0.018
0.024
0.026
0.016
0.026
0.018
0.0512
0.0520
0.0522
0.0527
0.0545
0.0548
16
11
12
13
15
8
19
55
58
28
42
53
50
17
OBSERVER
STANDARD
ERROR
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
0.0002
0.0002
0.0001
0.0009
0.0002
0.0003
Wedemayer
Samolyk
Wedemayer
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk (CCD)
Samolyk (CCD)
Lubcke (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
43028.746
43420.669
44562.557
45026.637
45521.711
47481.300
48154.642
49679.604
50370.624
52225.678
52524.7985
52885.7977
52888.748
CYCLE
O-C
N
5692
5958
6733
7048
7384
8714
9171
10206
10675
11934
12137
12382
12384
-0.012
-0.010
0.005
-0.031
-0.014
-0.026
-0.021
-0.011
-0.009
0.055
0.0781
0.0982
0.102
18
19
10
12
17
14
12
16
18
17
25
95
28
16
OBSERVER
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
B.
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk (CCD)
Samolyk (CCD)
Manske
STANDARD
ERROR
0.0007
0.0006
JD(min)
HEL.
2400000 +
43330.755
43330.775
43778.657
44238.778
48219.634
51486.5710
51490.638
51919.5400
52204.5686
52550.670
52979.5672
CYCLE
O-C
N
13030
13030
13360
13699
16632
19039
19042
19358
19568
19823
20139
-0.017
0.003
-0.015
-0.010
-0.036
-0.0546
-0.059
-0.0557
-0.0545
-0.058
-0.0587
19
11
14
14
14
17
56
17
66
54
14
70
OBSERVER
D.
G.
G.
G.
G.
G.
S.
G.
G.
S.
G.
Ruokonen
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk (CCD)
Cook (CCD)
Samolyk (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0011
0.0004
0.0005
0.001
0.0004
JD(min)
HEL.
2400000 +
50192.765 4)
50284.712
50320.769
50376.657
50687.634
50770.564
51053.603
51097.785
51839.636
52076.6952
52149.702
52463.3957
53201.6463
4)
CYCLE
O-C
N
26478
26580
26620
26682
27027
27119
27433
27482
28305
28568
28649
28997
29816
0.002
0.006
0.007
0.008
0.001
0.003
0.002
0.015
0.013
0.0036
-0.003
0.0030
0.0061
32
14
22
18
15
19
13
20
15
68
16
11
51
OBSERVER
S. Cook (CCD)
G. Samolyk
G. Samolyk
G. Samolyk
S. Cook (CCD)
G. Samolyk
S. Cook (CCD)
G. Samolyk
G. Samolyk
C. Hesseltine (CCD)
G. Samolyk
Bal-Mai (CCD)
G. Samolyk (CCD)
Observations combined from 50055 to 50330
20
STANDARD
ERROR
0.0006
0.0009
0.0002
JD(min)
HEL.
2400000 +
50370.616
50376.889
50642.7978
51088.6282
51452.6349
51576.6148
52146.8363
52223.6456
52239.5049
52415.6677
52542.5700
52603.5163
52860.6585
52899.6884
52923.6920
53097.7639
CYCLE
53492
53507
54144
55212
56084
56381
57747
57931
57969
58391
58695
58841
59457
59550.5
59608
60025
O-C
N
-0.020
-0.009
-0.0140
-0.0171
-0.0243
-0.0261
-0.0374
-0.0384
-0.0420
-0.0419
-0.0435
-0.0445
-0.0497
-0.0511
-0.0507
-0.0543
21
15
17
70
55
33
57
38
60
33
50
46
37
45
38
52
45
OBSERVER
STANDARD
ERROR
G.
G.
P.
G.
G.
G.
S.
G.
S.
N.
G.
S.
G.
G.
G.
G.
0.0002
0.0002
0.0003
0.0003
0.0003
0.0002
0.0002
0.0003
0.0003
0.0001
0.0002
0.0003
0.0003
0.0003
Samolyk
Samolyk
Kuebler (CCD)
Samolyk (CCD)
Lubcke (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Dvorak (CCD)
Simmons (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
52312.616
52398.663
52398.667
52435.709
52495.6196
52496.714
52545.723
52549.539 :
52581.669
52586.571
52587.658
52696.583
52875.759
52966.704
53168.781
53179.6651
CYCLE
O-C
N
17844
18002
18002
18070
18180
18182
18272
18279
18338
18347
18349
18549
18878
19045
19416
19436
0.002
-0.002
0.002
0.010
0.0122
0.017
0.010
0.014
0.011
0.012
0.010
0.010
0.006
-0.001
0.021
0.0127
22
17
14
14
20
52
26
15
12
20
21
19
22
11
22
7
44
OBSERVER
G.
D.
B.
C.
S.
C.
G.
G.
C.
C.
C.
G.
D.
C.
C.
G.
Samolyk
Weier
Manske
Stephan
Dvorak (CCD)
Stephan
Sarty
Chaple
Stephan
Stephan
Stephan
Chaple
Williams
Stephan
Stephan
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0001
JD(min)
HEL.
2400000 +
51734.694
51746.635
52086.717
52115.636
52210.555
52466.3964
52505.3692
52511.655
52562.5720
52812.7592
52861.7905
52875.624
52897.620
52914.5949
CYCLE
O-C
N
10713
10732
11273
11319
11470
11877
11939
11949
12030
12428
12506
12528
12563
12590
-0.031
-0.034
-0.033
-0.030
-0.033
-0.0381
-0.0395
-0.040
-0.0408
-0.0429
-0.0437
-0.040
-0.045
-0.0431
23
9
8
10
12
12
23
22
11
44
42
38
10
15
65
OBSERVER
D. Williams
M. Baldwin
M. Baldwin
C. Stephan
G. Samolyk
Bal-Mai (CCD)
Bal-Mai (CCD)
M. Simonsen
G. Samolyk (CCD)
N. Simmons (CCD)
S. Diesso (CCD)
D. Williams
C. Stephan
J. Bialozynski (CCD)
STANDARD
ERROR
0.0005
0.0005
0.0001
0.0002
0.0002
0.0001
JD(min)
HEL.
2400000 +
43219.900
43380.705
43690.730
43820.663
44046.768
44817.713
44915.611
45131.792
45553.700
45923.708
46387.546
49858.849 :
50284.8495
52146.6667
52500.3729
52533.5878
52886.7214
52889.6376
53189.7493
CYCLE
O-C
N
-1056
-780
-248
-25
363
1686
1854
2225
2949
3584
4380
10337
11068
14263
14870
14927
15533
15538
16053
-0.005
-0.031
-0.014
-0.028
-0.019
-0.015
-0.015
-0.023
-0.006
-0.027
-0.035
-0.007
0.0234
0.0438
0.0378
0.0375
0.0416
0.0442
0.0540
24
13
15
20
16
16
12
14
16
17
15
11
20
36
133
30
41
30
60
57
OBSERVER
STANDARD
ERROR
G. Samolyk
G. Samolyk
A. MacRobert
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
G. Lubcke (CCD)
S. Dvorak (CCD)
Bal-Mai (CCD)
G. Samolyk (CCD)
G. Samolyk (CCD)
C. Hesseltine (CCD)
G. Samolyk (CCD)
0.0010
0.0002
0.0004
0.0005
0.0007
0.0003
0.0004
JD(min)
HEL.
2400000 +
51813.588
51836.593
51836.5978
51863.5642
51871.4961
52073.7326
52169.6983
52506.758
52518.6584
52553.556
52603.523
52913.6202
CYCLE
O-C
N
11164
11193
11193
11227
11237
11492
11613
12038
12053
12097
12160
12551
-0.005
0.000
0.0048
0.0061
0.0070
0.0050
0.0066
0.002
0.0061
0.008
0.010
0.0080
25
16
15
64
36
60
31
29
53
19
19
49
OBSERVER
C.
M.
G.
S.
J.
S.
S.
M.
G.
G.
G.
G.
Stephan
Baldwin
Samolyk (CCD)
Dvorak (CCD)
A. Howell (CCD)
Dvorak (CCD)
Dvorak (CCD)
Simonsen
Samolyk (CCD)
Chaple
Chaple
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0005
0.0010
0.0001
0.0003
0.0007
0.0003
JD(min)
HEL.
2400000 +
52586.778
52609.614
52631.6400
52636.622
52639.679
52643.675
52644.648
52951.6910
52999.602
53010.5251
53038.659
53057.6251
CYCLE
34231
34302
34370.5
34386
34395.5
34408
34411
35366
35515
35549
35636.5
35695.5
O-C
N
0.088
0.098
0.1013
0.100
0.103
0.080
0.089
0.1049
0.113
0.1056
0.109
0.1067
17
16
20
15
23
23
17
46
17
54
15
28
26
OBSERVER
C.
C.
S.
G.
G.
C.
C.
G.
G.
S.
C.
G.
Stephan
Stephan
Dvorak (CCD)
Samolyk
Samolyk
Stephan
Stephan
Samolyk (CCD)
Samolyk
Dvorak (CCD)
Stephan
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0001
0.0001
0.0001
JD(min)
HEL.
2400000 +
50109.685
50129.727 :
50513.704
51536.6918
51579.672
51602.602
51874.816
51940.727
51983.707
52235.8738
52731.6050
CYCLE
O-C
N
11100
11107
11241
11598
11613
11621
11716
11739
11754
11842
12015
0.011
-0.005
-0.005
0.0003
-0.002
0.004
-0.004
0.000
-0.002
0.0010
0.0011
27
14
17
16
23
22
17
23
16
69
37
OBSERVER
C.
R.
R.
J.
G.
G.
R.
R.
R.
S.
G.
Stephan
Hill
Hill
A. Howell (CCD)
Samolyk
Samolyk
Hill
Hill
Hill
Dvorak (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0027
0.0001
0.0015
JD(min)
HEL.
2400000 +
52455.3817
52464.3807
52485.648
52521.647
52553.554
52553.557
52731.897
52763.808
52786.713
52786.719
52822.706
52885.707
52908.610
53164.6749
53168.769
CYCLE
O-C
N
12946
12957
12983
13027
13066
13066
13284
13323
13351
13351
13395
13472
13500
13813
13818
-0.0238
-0.0239
-0.027
-0.024
-0.023
-0.020
-0.026
-0.021
-0.022
-0.016
-0.026
-0.018
-0.022
-0.0218
-0.018
28
20
21
14
14
11
14
13
14
16
15
14
13
11
66
12
OBSERVER
Bal-Mai (CCD)
Bal-Mai (CCD)
R. Hays
R. Hays
R. Hays
D. Williams
R. Hays
D. Williams
R. Hays
R. Hill
R. Hays
R. Hays
M. Baldwin
J. Bialozynski (CCD)
C. Stephan
STANDARD
ERROR
0.0003
0.0002
0.0001
JD(min)
HEL.
2400000 +
43275.736
43701.674
43980.774
46210.802
46263.705
46273.757
46274.647
48835.754
49199.689
50600.641
52083.6764
52735.8036
52830.675
53077.8328
CYCLE
3596
4063
4369
6814
6872
6883
6884
9692
10091
11627
13253
13968
14072
14343
O-C
N
0.005
0.003
0.008
0.012
0.014
0.034
0.012
0.011
0.028
0.032
0.0323
0.0256
0.041
0.0265
16
11
15
15
11
14
11
18
18
12
67
65
26
51
29
OBSERVER
G.
G.
G.
P.
D.
D.
D.
G.
D.
S.
C.
G.
C.
G.
Samolyk
Samolyk
Samolyk
Atwood
Williams
Williams
Williams
Samolyk
Williams
Cook (CCD)
Hesseltine (CCD)
Samolyk (CCD)
Stephan
Samolyk (CCD)
STANDARD
ERROR
0.0007
0.0004
0.0003
JD(min)
HEL.
2400000 +
48654.852
49095.627
49423.659
49788.590
50131.654
50511.610
51586.612
51629.6647
51996.6492
52265.9077
52350.6489
52660.9115
53097.6031
CYCLE
O-C
N
17532
18177
18657
19191
19693
20249
21822
21885
22422
22816
22940
23394
24033
-0.001
-0.023
-0.026
-0.034
-0.040
-0.058
-0.054
-0.0560
-0.0606
-0.0642
-0.0653
-0.0691
-0.0741
30
11
6
10
13
7
10
22
50
68
122
31
46
OBSERVER
STANDARD
ERROR
G.
M.
M.
M.
S.
S.
C.
G.
J.
S.
G.
S.
G.
0.0001
0.0002
0.0002
0.0001
0.0003
0.0003
Samolyk
Baldwin
Baldwin
Baldwin
Cook (CCD)
Cook (CCD)
Stephan
Lubcke (CCD)
A. Howell (CCD)
Dvorak (CCD)
Lubcke (CCD)
Dvorak (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
43538.790
44307.801
44320.707
44660.637
44679.697
45352.813
46908.653
50520.690
51996.6190
52616.8590
52648.8249
52741.6487
52741.6489
53057.6109
CYCLE
O-C
N
20082
21333
21354
21907
21938
23033
25564
31440
33841
34850
34902
35053
35053
35567
-0.011
-0.007
-0.010
-0.016
-0.012
-0.007
-0.006
-0.024
-0.0214
-0.0270
-0.0262
-0.0241
-0.0239
-0.0245
31
10
10
15
15
18
9
7
13
44
36
39
104
67
36
OBSERVER
STANDARD
ERROR
G.
G.
P.
G.
P.
G.
R.
R.
G.
G.
S.
C.
G.
G.
0.0002
0.0002
0.0003
0.0002
0.0004
0.0004
Samolyk
Samolyk
Goodwin
Samolyk
Goodwin
Samolyk
Hill
Hill
Samolyk (CCD)
Samolyk (CCD)
Dvorak (CCD)
Hesseltine (CCD)
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
43050.878
43860.615
44138.667
44544.677
45945.767
45976.645
47730.848 5)
47794.803
48893.680
50367.539 :
50614.709
52975.6568
53189.6889
5)
CYCLE
-661
-294
-168
16
651
665
1460
1489
1987
2655
2767
3837
3934
O-C
N
0.010
-0.051
-0.022
-0.015
-0.074
-0.087
-0.079
-0.113
-0.090
-0.196
-0.158
-0.2012
-0.2029
25
16
19
26
13
10
36
16
21
11
17
95
87
OBSERVER
STANDARD
ERROR
G.
G.
G.
G.
D.
D.
G.
G.
G.
G.
G.
C.
G.
0.0001
0.0004
Samolyk
Samolyk
Samolyk
Hanson
Williams
Williams
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Hesseltine (CCD)
Samolyk (CCD)
Observations combined from 47688 to 47772
32
JD(min)
HEL.
2400000 +
50153.653
50165.716
50174.793 6)
50923.698
51231.726
51678.670
51681.688
51986.691
51986.705
51989.711 7)
52300.760
52741.6621
53049.6861
6)
7)
CYCLE
1575
1579
1582
1830
1932
2080
2081
2182
2182
2183
2286
2432
2534
O-C
N
-0.034
-0.050
-0.033
-0.060
-0.060
-0.059
-0.061
-0.066
-0.052
-0.066
-0.065
-0.0662
-0.0705
12
13
22
20
15
13
19
22
23
31
16
71
90
OBSERVER
STANDARD
ERROR
M.
M.
R.
M.
M.
M.
R.
R.
G.
R.
M.
G.
G.
0.0002
0.0003
Baldwin
Baldwin
Hill
Baldwin
Baldwin
Baldwin
Hill
Hill
Samolyk
Hill
Simonsen
Samolyk (CCD)
Samolyk (CCD)
Observations combined from 50159 to 50189
Observations combined from 51983 to 51995
33
JD(min)
HEL.
2400000 +
46104.686
48300.573
48308.624
48690.368 8)
49018.631
49021.544
49780.625
49791.627
49802.618
50095.679
50534.567
51611.638
53050.6549
53053.5858
8)
CYCLE
O-C
N
26509
29506
29517
30038
30486
30490
31526
31541
31556
31956
32555
34025
35989
35993
0.011
-0.001
-0.009
-0.001
0.013
-0.005
0.000
0.011
0.012
-0.007
-0.005
-0.001
-0.0050
-0.0049
9
12
15
15
14
10
17
14
11
11
10
22
73
76
OBSERVER
STANDARD
ERROR
S.
M.
M.
S.
M.
M.
M.
M.
M.
S.
M.
M.
G.
J.
0.0001
0.0003
Cook
Baldwin
Baldwin
Cook
Baldwin
Baldwin
Baldwin
Baldwin
Baldwin
Cook (CCD)
Baldwin
Baldwin
Samolyk (CCD)
Bialozynski (CCD)
Observations compined from 48689 to 48692
34
JD(min)
HEL.
2400000 +
52311.5463
52559.8713
52581.8875
52609.830
52643.698
52644.554
52662.5464
52671.639
53003.5965
53010.5824
53038.732
53039.5858
CYCLE
25236.5
25823
25875
25941
26021
26023
26065.5
26087
26871
26887.5
26954
26956
O-C
N
0.0300
0.0317
0.0311
0.029
0.025
0.035
0.0326
0.022
0.0350
0.0349
0.028
0.0354
35
44
20
18
18
17
38
18
46
20
17
55
35
OBSERVER
G.
G.
S.
G.
C.
C.
G.
C.
G.
S.
C.
J.
Lubcke (CCD)
Samolyk (CCD)
Dvorak (CCD)
Sarty
Stephan
Stephan
Samolyk (CCD)
Stephan
Samolyk (CCD)
Dvorak (CCD)
Stephan
Bialozynski (CCD)
STANDARD
ERROR
0.0003
0.0003
0.0003
0.0001
0.0003
0.0004
0.0003
JD(min)
HEL.
2400000 +
50006.613
50006.616
50742.533 :
50779.637
51085.751 :
51453.713
51549.582
51818.591
52189.648
52223.665
52254.578
52554.509 :
52993.595
CYCLE
3090
3090
3328
3340
3439
3558
3589
3676
3796
3807
3817
3914
4056
O-C
N
-0.131
-0.128
-0.159
-0.162
-0.178
-0.190
-0.180
-0.194
-0.203
-0.201
-0.210
-0.224
-0.233
16
10
5
10
14
16
15
12
17
15
16
22
15
36
OBSERVER
G.
M.
M.
M.
R.
R.
M.
D.
G.
G.
G.
G.
G.
Samolyk
Baldwin
Baldwin
Baldwin
Hill
Hill
Baldwin
Williams
Samolyk
Samolyk
Samolyk
Chaple
Samolyk
JD(min)
HEL.
2400000 +
42981.819
43741.783
43741.784
45193.727
46713.631
47062.705
47524.549
48219.614
52133.6706
52252.6074
52547.6294
CYCLE
1655
2147
2147
3087
4071
4297
4596
5046
7580
7657
7848
O-C
N
-0.001
0.011
0.012
0.015
0.016
0.007
0.010
-0.002
-0.0053
-0.0040
-0.0038
37
10
15
11
13
12
17
10
16
120
69
54
OBSERVER
STANDARD
ERROR
G.
G.
C.
G.
G.
G.
G.
G.
C.
G.
S.
0.0003
0.0002
0.0002
Samolyk
Samolyk
Hesseltine
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Hesseltine (CCD)
Samolyk (CCD)
Dvorak (CCD)
JD(min)
HEL.
2400000 +
50376.671
50726.648
51084.588
51156.505
51837.636
52133.766
52201.6134
52219.558
52240.5917
52478.3855
52496.6128
52501.3783
52565.5965
52602.6112
52806.7546
52870.6902
52920.6030
52986.5020
CYCLE
O-C
N
22043
23291
24568
24824
27253
28309
28551
28615
28690
29538
29603
29620
29849
29981
30709
30937
31115
31350
-0.022
-0.010
-0.027
-0.038
-0.049
-0.044
-0.0580
-0.060
-0.0582
-0.0612
-0.0612
-0.0629
-0.0611
-0.0619
-0.0648
-0.0652
-0.0673
-0.0672
38
10
13
13
8
21
23
51
15
65
24
30
18
44
45
58
46
52
31
OBSERVER
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
G. Samolyk
S. Dvorak (CCD)
G. Samolyk
S. Dvorak (CCD)
Bal-Mai (CCD)
G. Samolyk (CCD)
Bal-Mai (CCD)
S. Dvorak (CCD)
G. Samolyk (CCD)
C. Limbach (CCD)
R. Poklar (CCD)
R. Poklar (CCD)
G. Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0002
0.0004
0.0003
0.0005
0.0001
0.0002
0.0001
0.0001
0.0001
0.0003
JD(min)
HEL.
2400000 +
49660.587 9)
49660.770 9)
49663.110 10)
50808.602
50812.592
50814.588
51172.613
51174.596
51176.589
51496.739
51896.423 11)
51896.606 11)
52080.511 12)
52080.701 12)
52268.595 13)
52268.773 13)
52636.5789
52994.6051
53000.5842
9)
10)
11)
12)
13)
CYCLE
16358
16358.5
16365
19526
19537
19542.5
20530.5
20536
20541.5
21425
22528
22528.5
23036
23036.5
23555
23555.5
24570.5
25558.5
25575
O-C
N
-0.058
-0.056
-0.072
-0.053
-0.049
-0.046
-0.050
-0.060
-0.060
-0.070
-0.088
-0.086
-0.087
-0.079
-0.077
-0.080
-0.0871
-0.0894
-0.0895
Observations
Observations
Observations
Observations
Observations
combined
combined
combined
combined
combined
39
22
21
16
12
12
14
9
19
16
16
36
35
55
55
16
32
31
48
50
from
from
from
from
from
OBSERVER
STANDARD
ERROR
G.
G.
C.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
0.0002
0.0003
0.0002
49660
49660
51895
52079
52267
Samolyk
Samolyk
Hesseltine
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
to
to
to
to
to
49661
49666
51898
52082
52270
JD(min)
HEL.
2400000 +
49249.659
49942.697
49986.645
50030.579
50341.600
50635.721
50939.976
50973.780
51061.678
51105.627
51372.696
51798.6524
52934.5358
CYCLE
O-C
N
9501
9706
9719
9732
9824
9911
10001
10011
10037
10050
10129
10255
10591
-0.017
-0.006
-0.006
-0.020
-0.016
-0.009
-0.009
-0.012
-0.010
-0.009
-0.009
-0.0102
-0.0149
40
17
19
31
10
15
24
18
29
22
16
16
47
OBSERVER
STANDARD
ERROR
M.
D.
R.
R.
R.
R.
D.
A.
D.
D.
D.
J.
S.
0.0002
0.0007
Nall
Williams
Hays
Schmude
Schmude
Hays
Matsnev
Filho
Williams
Williams
Williams
A. Howell (CCD)
Dvorak (CCD)
JD(min)
HEL.
2400000 +
49901.745
49924.770
49925.673
49927.752
49928.665
49978.603
50280.669
50283.347 14)
51371.671
51427.610
51431.175 15)
14)
15)
CYCLE
O-C
N
OBSERVER
25044
25082.5
25084
25087.5
25089
25172.5
25677.5
25682
27501.5
27595
27601
0.080
0.076
0.082
0.067
0.083
0.077
0.082
0.068
0.076
0.089
0.065
14
14
10
12
14
10
14
14
8
10
52
M.
M.
M.
M.
M.
M.
M.
S.
M.
M.
M.
Baldwin
Baldwin
Baldwin
Baldwin
Baldwin
Baldwin
Baldwin
Cook (CCD)
Baldwin
Baldwin
Baldwin
Observations combined from 50282 to 50284
Observations combined from 51424 to 51438
41
JD(min)
HEL.
2400000 +
43275.799
43337.725
43337.746
43693.772
44046.707
44307.825
47706.744
48831.686
49480.813
50284.650
52028.7929
52397.7575
52521.6084
52728.7962
52763.6294
52796.6536
52860.6446
53097.7621
53141.6269
CYCLE
11228.5
11348.5
11348.5
12038.5
12722.5
13228.5
19815
21995
23253
24810.5
28190.5
28905.5
29145.5
29547
29614.5
29678.5
29802.5
30262
30347
O-C
N
0.253
0.259
0.280
0.261
0.248
0.267
0.511
0.560
0.551
0.708
0.7501
0.7703
0.7797
0.7910
0.7938
0.7936
0.7998
0.8125
0.8167
15
11
10
15
12
12
13
14
19
12
41
32
61
43
35
31
42
47
41
42
OBSERVER
STANDARD
ERROR
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
S.
G.
G.
C.
G.
G.
G.
G.
0.0008
0.0004
0.0003
0.0004
0.0002
0.0007
0.0003
0.0005
0.0005
Samolyk
Samolyk
Wedemayer
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Samolyk (CCD)
Hesseltine (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
51595.5953
51957.5866
51958.6659
51971.5975
52238.7815
52252.7867
52264.6372
52279.7205
52291.5714
52319.5831
52640.6372
53003.7088
53029.5645
CYCLE
28220
28556
28557
28569
28817
28830
28841
28855
28866
28892
29190
29527
29551
O-C
N
0.2281
0.2279
0.2299
0.2332
0.2331
0.2326
0.2322
0.2325
0.2325
0.2330
0.2352
0.2380
0.2371
87
33
26
39
27
73
31
27
23
53
61
46
50
43
OBSERVER
STANDARD
ERROR
C.
S.
G.
S.
S.
G.
S.
S.
S.
G.
C.
G.
G.
0.0001
0.0007
0.0003
0.0006
0.0006
0.0001
0.0003
0.0003
0.0002
0.0001
0.0002
0.0001
0.0002
Hesseltine (CCD)
Dvorak (CCD)
Lubcke (CCD)
Dvorak (CCD)
Dvorak (CCD)
Samolyk (CCD)
Dvorak (CCD)
Dvorak (CCD)
Dvorak (CCD)
Lubcke (CCD)
Hesseltine (CCD)
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
52497.824
52575.548
52605.666
52609.550
52610.523
52643.556
52644.528
52676.5842
52871.861
52875.747
52907.810
52909.754
52915.580
52950.562
53017.592
53018.5613
53051.593
CYCLE
O-C
N
10288
10368
10399
10403
10404
10438
10439
10472
10673
10677
10710
10712
10718
10754
10823
10824
10858
-0.051
-0.050
-0.050
-0.052
-0.050
-0.049
-0.049
-0.0534
-0.055
-0.055
-0.053
-0.052
-0.055
-0.049
-0.054
-0.0567
-0.057
44
12
12
15
17
11
10
12
100
12
11
15
16
7
14
17
51
16
OBSERVER
D.
C.
R.
C.
C.
C.
C.
S.
R.
D.
R.
R.
M.
R.
R.
G.
R.
Williams
Stephan
Hays
Stephan
Stephan
Stephan
Stephan
Dvorak (CCD)
Hays
Williams
Hays
Hill
Baldwin
Hays
Hays
Samolyk (CCD)
Hays
STANDARD
ERROR
0.0001
0.0001
JD(min)
HEL.
2400000 +
51554.657
51582.540
51814.665
51888.5257
51897.581
52246.5141
52261.600
52264.611 :
52270.6322
52564.561
52585.6641
52637.662
CYCLE
7326
7363
7671
7769
7781
8244
8264
8268
8276
8666
8694
8763
O-C
N
-0.012
-0.014
-0.019
-0.0172
-0.006
-0.0204
-0.008
-0.011
-0.0196
-0.021
-0.0203
-0.025
45
10
8
9
36
15
18
22
7
76
15
39
15
OBSERVER
M.
M.
R.
S.
C.
J.
C.
M.
J.
C.
S.
C.
Baldwin
Baldwin
Berg
Dvorak (CCD)
Stephan
Blackwell (CCD)
Stephan
Simonsen
A. Howell (CCD)
Stephan
Dvorak (CCD)
Stephan
STANDARD
ERROR
0.0002
0.0001
0.0001
JD(min)
HEL.
2400000 +
52404.434
52652.310
52664.310
52695.350
52723.709
52727.705
52734.713
52753.400
52755.408
52988.279
52996.798
53038.667
53044.328
53092.710
53168.771
CYCLE
19898
20641
20677
20770
20855
20867
20888
20944
20950
21648
21673.5
21799
21816
21961
22189
O-C
N
-0.023
-0.040
-0.051
-0.039
-0.039
-0.047
-0.045
-0.042
-0.036
-0.044
-0.033
-0.035
-0.046
-0.041
-0.050
8
11
9
13
16
18
18
14
11
6
12
14
9
14
7
46
OBSERVER
S.
S.
S.
S.
C.
C.
C.
J.
J.
S.
G.
C.
S.
S.
C.
Kracenicki
Foglia
Foglia
Foglia
Stephan
Stephan
Stephan
Virtanen
Virtanen
Foglia
Samolyk
Stephan
Foglia
Cook
Stephan
JD(min)
HEL.
2400000 +
50104.674
50110.808
50150.635
50159.799 :
50202.712 :
51262.625
51262.631
51265.692
51587.334
51602.657
51608.770
51657.783
52426.670
52763.628
52812.6386
53057.7000
CYCLE
1667
1669
1682
1685
1699
2045
2045
2046
2151
2156
2158
2174
2425
2535
2551
2631
O-C
N
0.108
0.116
0.121
0.095
0.123
0.155
0.161
0.159
0.161
0.168
0.154
0.156
0.170
0.172
0.1705
0.1728
9
16
13
13
6
12
12
11
20
17
14
14
20
15
34
68
47
OBSERVER
STANDARD
ERROR
R.
R.
S.
R.
R.
R.
D.
D.
S.
G.
D.
D.
G.
D.
G.
G.
0.0007
0.0002
Schmude
Hays
Cook (CCD)
Hill
Hill
Berg
Williams
Williams
Foglia
Samolyk
Williams
Williams
Samolyk
Williams
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
43262.724
44766.665
45463.710
45876.704
46924.670
50580.640
52405.6341
52763.710
52769.6807
52781.6170
52812.6502
53176.7008
CYCLE
575
1835
2419
2765
3643
6706
8235
8535
8540
8550
8576
8881
O-C
N
-0.003
0.004
-0.012
-0.003
-0.016
-0.037
-0.0543
-0.058
-0.0551
-0.0548
-0.0551
-0.0519
48
17
10
14
12
11
13
35
10
100
28
50
44
OBSERVER
G.
G.
G.
G.
G.
S.
S.
D.
C.
G.
C.
G.
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Cook (CCD)
Dvorak (CCD)
Williams
Hesseltine (CCD)
Samolyk (CCD)
Hesseltine (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0004
0.0004
0.0001
0.0003
JD(min)
HEL.
2400000 +
43612.682
44271.828
45442.842
50567.659
52038.7004
52323.8451
52387.5642
52616.9548
52739.7928
52750.7658
52783.6868
52811.6532
53050.7796
53119.6324
53154.6783
CYCLE
O-C
-3983
-2121
1187
15664
19819.5
20625
20805
21453
21800
21831
21924
22003
22678.5
22873
22972
0.007
0.011
0.003
0.006
0.0128
0.0130
0.0127
0.0132
0.0143
0.0134
0.0127
0.0133
0.0148
0.0152
0.0154
N
14
18
15
9
49
35
26
34
48
34
86
32
49
49
31
49
OBSERVER
STANDARD
ERROR
G.
G.
G.
S.
G.
S.
S.
G.
G.
S.
C.
R.
G.
G.
G.
0.0002
0.0001
0.0002
0.0004
0.0002
0.0003
0.0002
0.0002
0.0003
0.0002
0.0003
Samolyk
Hanson
Samolyk
Cook (CCD)
Samolyk (CCD)
Dvorak (CCD)
Dvorak (CCD)
Samolyk (CCD)
Samolyk (CCD)
Dvorak (CCD)
Hesseltine (CCD)
Poklar (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
51367.649
51435.754
51437.699
51439.646
51439.646
51476.6134
51727.631
51836.5941
51838.540
52085.661
52196.566
52198.521
52513.743
52517.638
52875.675
52951.5633
CYCLE
7903
7938
7939
7940
7940
7959
8088
8144
8145
8272
8329
8330
8492
8494
8678
8717
O-C
N
0.015
0.015
0.014
0.015
0.015
0.0110
0.012
0.0060
0.006
0.002
-0.008
0.001
-0.008
-0.004
-0.007
-0.0078
50
15
9
15
10
16
33
13
27
10
17
14
14
14
12
8
52
OBSERVER
J.
M.
M.
M.
D.
G.
J.
G.
M.
M.
J.
W.
R.
M.
D.
G.
McKenna
Baldwin
Baldwin
Baldwin
Williams
Samolyk (CCD)
McKenna
Samolyk (CCD)
Baldwin
Baldwin
McKenna
Anthony
Hill
Baldwin
Williams
Samolyk (CCD)
STANDARD
ERROR
0.0002
0.0001
0.0001