OBSERVED MINIMA TIMINGS
OF ECLIPSING BINARIES
NUMBER 11
Prepared by:
Marvin E. Baldwin
Chairman, AAVSO
Eclipsing Binary
Committee
Gerard Samolyk
AAVSO Eclipsing
Binary Committee
October 2006
Funds for publication were provided by
The Harold S. Martin Fund.
ISBN 1-878174-64-9
COPYRIGHT 2006
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 514 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 10.
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.
Most 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.
With the exception of Z Dra and GU Ori the linear elements in the 1985 General Catalog of Variable Stars
(34) were used to compute the O-C values. For Z Dra the linear elements from SAC 68 (36) were used.
For GU Ori the linear elements from JAAVSO Vol. 14 No. 1 (24) were used.
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
32
33
34
35
36
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.
Baldwin, M.E. Robinson, L.J. 1965, Inf. Bull. Var. Stars, No. 92
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. Samolyk, G. Wedemayer G.J. 1977, J. Amer. Assoc. Var. Star Obs., 6,9
Baldwin, M. E. 1978, J. Amer. Assoc. Var. Star Obs., 7, 28.
Samolyk, G. 1985, J. Amer. Assoc. Var. Star Obs., 14,1,12
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.
Baldwin, M. E., and Samolyk, G. 2004, Observed Minima Timings of Eclipsing Binaries No. 9,
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.
Kurpinskw-Winiarska M. et. al. 1996, SAC 68
vi
TABLE 1
WZ
CZ
OO
V342
V346
SV
TZ
UU
AK
RZ
AB
IR
PV
DK
EG
W
RV
WW
BR
CG
V387
V477
TT
TY
FZ
Z
YY
Z
SZ
CC
VX
Y
SS
EW
RW
FZ
GU
U
DI
IU
RV
V505
RW
HU
V
X
W
XZ
RU
VV
1 2
And
Aqr
Aql
X
Aql
Aql
Cam
CMa
CMa
CMi
Cas
X
Cas
Cas
Cas
Cep
Cep
Crv
Crv
Cyg
Cyg
Cyg
Cyg
Cyg
Del
Del
Del
Dra
Eri
Her
Her X X
Her
Lac
Leo
X
Lib
Lyr
Mon
Ori
Ori
Peg
Peg
Per
Psc
Sgr
Tau
Tau
Tri
Tri
UMa
UMa
UMi
Vir
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 32 33
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
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
WZ
CZ
OO
V342
V346
SV
TZ
UU
AK
RZ
AB
IR
PV
DK
EG
W
RV
WW
BR
CG
V387
V477
TT
TY
FZ
Z
YY
Z
SZ
CC
VX
Y
SS
EW
RW
FZ
GU
U
DI
IU
RV
V505
RW
HU
V
X
W
XZ
RU
VV
And
Aqr
Aql
Aql
Aql
Cam
CMa
CMa
CMi
Cas
Cas
Cas
Cas
Cep
Cep
Crv
Crv
Cyg
Cyg
Cyg
Cyg
Cyg
Del
Del
Del
Dra
Eri
Her
Her
Her
Lac
Leo
Lib
Lyr
Mon
Ori
Ori
Peg
Peg
Per
Psc
Sgr
Tau
Tau
Tri
Tri
UMa
UMa
UMi
Vir
Earliest
Minimum
Earliest
Listing
Latest
Listing
Epoch
2400000 +
Period
(Days)
1966
1976
1960
1965
1965
1964
1976
1976
1967
1961
1965
1975
1976
1976
1966
1971
1975
1970
1968
1976
1976
1966
1968
1965
1968
1965
1968
1965
1959
1976
1966
1963
1965
1968
1968
2000
1976
1968
1976
1977
1977
1964
1965
1964
1975
1960
1966
1967
1972
1977
2002
1999
2004
1997
2003
2002
1976
1996
1998
2004
2003
2001
1998
2000
2004
2003
2001
1995
2003
2003
2002
2000
1996
2002
2003
2002
2004
1988
2004
1997
2002
1999
2000
1999
2002
2000
2003
2002
2003
1977
2000
2000
2001
2000
2003
2003
2004
2003
2003
1997
2005
2005
2006
2005
2005
2005
2005
2005
2006
2006
2006
2006
2006
2006
2006
2006
2005
2005
2005
2005
2005
2005
2005
2005
2006
2006
2006
2006
2005
2006
2005
2006
2006
2006
2005
2006
2006
2005
2005
2006
2006
2004
2006
2005
2005
2006
2006
2005
2006
2006
40872.290
43371.469
38613.2222
39318.581
41918.384
42594.61518
27124.871
44598.412
43101.672
43200.3063
42714.4627
42364.054
40227.4044
33590.5630
42594.3825
39647.766
41029.384
40377.886
41539.4654
39425.1221
27985.461
44189.2639
45232.419
42959.4450
31324.329
43499.736
41581.624
13086.3345
41864.30517
39668.342
45258.466
45436.451
41155.660
26499.697
33680.4481
44024.4583
43069.903
36511.66823
45196.488
45611.436
24381.480
44461.5907
45684.204
41275.3219
24474.305
42502.721
45765.7385
46168.426
41596.3365
31221.218
0.6956576
0.8627540
0.50678848
3.390882
1.106363
0.59306995
1.911446
2.1664842
0.5658975
1.195247
1.3668738
0.6806854
1.75046986
0.9859064
0.54462183
0.38808083
0.7472521
3.3177690
1.33256415
0.63114100
0.6405964
2.3469906
2.871119
1.19112689
0.7832126
1.3574560
0.32149415
3.9928077
0.81809828
1.7340058
1.0744942
1.6861020
1.4379983
1.948723
1.90609412
0.3999866
0.470681
0.374781439
0.7118168
0.8570251
0.55399145
1.18287156
2.7688356
2.0562997
0.5852057
0.9715352
0.33363749
1.22232
0.52492618
0.44613577
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 for Z Dra and GU Ori (see the introduction).
TABLE 3
M.
D.
R.
J.
S.
N.
G.
J.
S.
M.
S.
A.
S.
H.
H.
P.
T.
R.
C.
Baldwin
Beard
Berg
Bialozynski (CCD)
Brady (CCD)
Butterworth (CCD)
Chaple
Coloma (CCD)
Cook (CCD)
Csukas
Dvorak (CCD)
Filho
Foglia
Gerner
Gerner (CCD)
Guilbault
Hager
Hays
Haza (CCD)
36 Observers
13
5
1
13
3
4
24
2
46
1
31
1
3
1
3
1
1
32
2
C.
R.
J.
S.
V.
B.
I.
C.
R.
R.
G.
G.
G.
T.
M.
C.
J.
G.
D.
Hesseltine (CCD)
8
Hill
25
A. Howell (CCD)
10
Jamieson (CCD)
2
Jani
1
Manske (CCD)
2
Megson
2
Norris (CCD)
1
Papini (CCD)
4
Poklar (CCD)
9
Samolyk
63
Samolyk (CCD)
113
Sarty
1
Shoup (CCD)
1
Simonsen
2
Stephan
43
Virtanen
1
Wedemayer
2
Williams
37
514
This table lists the observers and the number of minima contributed by each. CCD stands for Charge-Coupled
Device.
JD(min)
HEL.
2400000 +
52585.801
52963.5442
52981.6312
53301.638
53331.5508
53591.7294
53621.642
53686.338
53694.688
53724.6016
CYCLE
O-C
16838
17381
17407
17867
17910
18284
18327
18420
18432
18475
0.028
0.0295
0.0294
0.034
0.0332
0.0358
0.035
0.035
0.037
0.0374
N
19
60
75
25
32
73
17
15
21
106
OBSERVER
R.
G.
S.
S.
S.
J.
S.
V.
C.
G.
Hill
Samolyk (CCD)
Dvorak (CCD)
Cook (CCD)
Dvorak (CCD)
Bialozynski (CCD)
Cook (CCD)
Jani
Stephan
Samolyk (CCD)
STANDARD
ERROR
0.0003
0.0001
0.0002
0.0002
0.0001
JD(min)
HEL.
2400000 +
51454.598
51849.735
52189.6557
52262.5606
52931.619
52963.5403
53238.7568
53314.6791
53634.7595
53653.742
53673.5830
CYCLE
9369
9827
10221
10305.5
11081
11118
11437
11525
11896
11918
11941
O-C
-0.013
-0.018
-0.0219
-0.0197
-0.027
-0.0277
-0.0297
-0.0297
-0.0311
-0.029
-0.0315
N
OBSERVER
14
16
66
51
14
44
41
48
60
18
80
G.
R.
G.
S.
D.
G.
G.
G.
J.
C.
G.
Samolyk
Hill
Samolyk (CCD)
Dvorak (CCD)
Williams
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Bialozynski (CCD)
Stephan
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0008
0.0002
0.0001
0.0002
0.0001
0.0002
JD(min)
HEL.
2400000 +
53106.8942
53176.821
53239.670
53239.681
53258.4244
53258.6779
53274.641
53292.638
53565.792
53574.6631
53581.762
53585.814
53616.726
53641.5597
53643.580
54000.3714
CYCLE
O-C
N
OBSERVER
28599
28737
28861
28861
28898
28898.5
28930
28965.5
29504.5
29522
29536
29544
29605
29654
29658
30362
0.0283
0.018
0.025
0.036
0.0287
0.0288
0.028
0.034
0.029
0.0314
0.035
0.033
0.031
0.0319
0.025
0.0374
60
16
13
10
44
55
16
13
17
52
15
17
14
68
14
65
S.
D.
R.
D.
R.
R.
D.
C.
C.
G.
C.
C.
D.
G.
R.
R.
Dvorak (CCD)
Williams
Hays
Williams
Papini (CCD)
Poklar (CCD)
Williams
Stephan
Stephan
Samolyk (CCD)
Stephan
Stephan
Williams
Samolyk (CCD)
Hays
Papini (CCD)
STANDARD
ERROR
0.0001
0.0001
0.0001
0.0001
0.0001
0.0002
JD(min)
HEL.
CYCLE
2400000 +
50627.023 1) 3335
50644.010 2) 3340
50667.739
3347
50684.704
3352
50718.600
3362
51447.6153
3577
52125.779
3777
52810.7194
3979
53539.7550
4194
53621.1314 3) 4218
O-C
-0.149
-0.117
-0.124
-0.113
-0.126
-0.1506
-0.163
-0.1811
-0.1851
-0.1899
N
OBSERVER
29
28
24
29
25
D.
D.
D.
D.
D.
J.
G.
G.
G.
G.
29
59
125
150
Beard
Beard
Beard
Beard
Beard
A. Howell (CCD)
Samolyk
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
1) Observations combined from 50623 to 50633
2) Observations combined from 50640 to 50650
3) Observations combined from 53617 to 53624
STANDARD
ERROR
0.0017
0.0001
0.0002
0.0004
JD(min)
HEL.
2400000 +
52822.686
52833.749
53239.7867
53258.5941
53259.697
53279.618
53561.738
53581.6521
53643.605
CYCLE
9856
9866
10233
10250
10251
10269
10524
10542
10598
O-C
-0.012
-0.012
-0.0099
-0.0106
-0.014
-0.008
-0.010
-0.0106
-0.014
N
OBSERVER
12
13
60
43
14
26
14
70
15
R.
D.
G.
G.
D.
S.
D.
G.
R.
Hays
Williams
Samolyk (CCD)
Samolyk (CCD)
Williams
Cook (CCD)
Williams
Samolyk (CCD)
Hays
STANDARD
ERROR
0.0002
0.0004
0.0001
JD(min)
HEL.
2400000 +
52547.562 :
52586.699
52723.707
52930.685
53003.639
53306.694
53334.570
53373.704
53443.694
53481.647
CYCLE
O-C
N
OBSERVER
16782
16848
17079
17428
17551
18062
18109
18175
18293
18357
0.047
0.041
0.050
0.047
0.053
0.049
0.051
0.042
0.050
0.047
16
18
17
18
18
17
22
16
16
25
G.
C.
C.
C.
G.
S.
S.
C.
C.
S.
Chaple
Stephan
Stephan
Stephan
Samolyk
Cook (CCD)
Cook (CCD)
Stephan
Stephan
Cook (CCD)
JD(min)
HEL.
2400000 +
43096.844
43165.638
43165.662
43876.710
44608.763
44654.624
45021.623
45298.818
45732.665
45753.699
46445.673
46835.599
53049.6222
53393.6791
CYCLE
8356
8392
8392
8764
9147
9171
9363
9508
9735
9746
10108
10312
13563
13743
O-C
-0.070
-0.088
-0.064
-0.074
-0.105
-0.118
-0.117
-0.082
-0.133
-0.125
-0.094
-0.103
-0.1909
-0.1943
N
OBSERVER
STANDARD
ERROR
8
9
10
10
10
12
15
16
10
22
16
18
48
58
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
G.
0.0003
0.0005
Wedemayer
Samolyk
Wedemayer
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
50107.703
50122.845 :
50159.697
50523.653
51264.5838
52683.6267
52696.6252
53413.7302
CYCLE
2543
2550
2567
2735
3077
3732
3738
4069
O-C
-0.078
-0.102
-0.080
-0.093
-0.1001
-0.1043
-0.1047
-0.1060
N
OBSERVER
STANDARD
ERROR
18
13
11
16
21
73
43
71
M.
R.
R.
G.
G.
G.
S.
G.
0.0001
0.0003
0.0002
0.0001
Baldwin
Hill
Hill
Samolyk
Samolyk (CCD)
Samolyk (CCD)
Jamieson (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
50873.690
51488.833
51611.627
51989.6430
52316.740
52986.7539
53763.7275
53763.7282
CYCLE
13734
14821
15038
15706
16284
17468
18841
18841
O-C
-0.018
-0.006
-0.012
-0.0151
-0.007
-0.0156
-0.0193
-0.0186
N
OBSERVER
21
18
17
49
25
60
90
88
R.
G.
M.
G.
G.
C.
R.
G.
Hill
Samolyk
Baldwin
Samolyk (CCD)
Samolyk
Hesseltine (CCD)
Poklar (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0001
0.0002
0.0002
JD(min)
HEL.
2400000 +
53254.780
53259.560
53314.546
53357.567
53406.571
53406.583
53621.725
53645.630
53682.6791
53792.640
53792.642
CYCLE
O-C
N
OBSERVER
8412
8416
8462
8498
8539
8539
8719
8739
8770
8862
8862
0.056
0.055
0.060
0.052
0.051
0.063
0.060
0.060
0.0566
0.055
0.057
26
20
16
24
21
16
25
23
60
17
22
C.
G.
G.
G.
G.
G.
S.
G.
J.
H.
G.
Stephan
Chaple
Samolyk
Chaple
Chaple
Samolyk
Cook (CCD)
Samolyk
Bialozynski (CCD)
Gerner
Samolyk
STANDARD
ERROR
0.0005
JD(min)
HEL.
2400000 +
52930.551
52986.5932
53001.631
53284.575
53288.676
53288.680
53299.610
53407.590
53616.729
53623.567
53627.664
53638.596
53653.633
53709.676
53761.615
53787.590
CYCLE
O-C
N
OBSERVER
7474
7515
7526
7733
7736
7736
7744
7823
7976
7981
7984
7992
8003
8044
8082
8101
0.074
0.0739
0.076
0.077
0.078
0.082
0.077
0.074
0.081
0.085
0.081
0.078
0.079
0.080
0.078
0.083
12
37
14
28
14
11
24
25
14
16
32
27
16
15
16
25
M.
G.
D.
G.
D.
C.
S.
G.
D.
G.
S.
G.
R.
R.
R.
G.
Baldwin
Samolyk (CCD)
Williams
Chaple
Williams
Stephan
Cook (CCD)
Chaple
Williams
Chaple
Cook (CCD)
Chaple
Hays
Hays
Hays
Chaple
STANDARD
ERROR
0.0001
JD(min)
HEL.
2400000 +
52168.660
52511.725
52603.6184
53176.7543
53274.7733
53315.6179
53329.5719
53345.5658
53903.7244
CYCLE
O-C
N
OBSERVER
STANDARD
ERROR
14404
14908
15043
15885
16029
16089
16109.5
16133
16953
0.013
0.013
0.0139
0.0127
0.0130
0.0165
0.0164
0.0142
0.0108
11
18
47
30
40
27
38
27
97
G.
M.
S.
G.
G.
S.
S.
S.
G.
0.0001
0.0002
0.0001
0.0006
0.0005
0.0005
0.0002
Samolyk
Simonsen
Dvorak (CCD)
Samolyk (CCD)
Samolyk (CCD)
Brady (CCD)
Brady (CCD)
Brady (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
51141.560
51162.563
52186.5840
52235.5971
52951.5389
52986.5467
53035.5602
53266.6207
53581.7064
53910.7931
CYCLE
6235
6247
6832
6860
7269
7289
7317
7449
7629
7817
O-C
-0.024
-0.027
-0.0305
-0.0305
-0.0309
-0.0325
-0.0322
-0.0337
-0.0326
-0.0342
N
16
20
47
76
64
59
52
41
110
61
OBSERVER
STANDARD
ERROR
G.
G.
S.
S.
G.
J.
J.
G.
C.
G.
0.0002
0.0002
0.0001
0.0004
0.0002
0.0004
0.0001
0.0002
Samolyk
Samolyk
Dvorak (CCD)
Dvorak (CCD)
Samolyk (CCD)
Bialozynski (CCD)
Bialozynski (CCD)
Samolyk (CCD)
Hesseltine (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
51698.744
51775.648
51777.618
51842.682
52468.7340
52618.5919
52618.5921
52899.5755
53588.7213
53931.8155
CYCLE
O-C
N
OBSERVER
STANDARD
ERROR
18367
18445
18447
18513
19148
19300
19300
19585
20284
20632
0.038
0.041
0.040
0.034
0.0353
0.0354
0.0356
0.0357
0.0329
0.0317
22
10
13
11
37
30
42
49
83
50
G.
G.
G.
R.
G.
G.
S.
G.
G.
G.
0.0002
0.0002
0.0002
0.0002
0.0001
0.0001
Samolyk
Samolyk
Samolyk
Hill
Samolyk (CCD)
Samolyk (CCD)
Jamieson (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
53289.674
53307.650
53319.631
53553.822
53558.7233
53565.798
53570.703
53861.5342
CYCLE
O-C
N
OBSERVER
19638
19671
19693
20123
20132
20145
20154
20688
0.008
0.011
0.011
0.014
0.0141
0.009
0.012
0.0153
18
26
20
12
86
20
30
C.
S.
S.
D.
G.
C.
S.
J.
Stephan
Cook (CCD)
Cook (CCD)
Williams
Samolyk (CCD)
Stephan
Cook (CCD)
Coloma (CCD)
STANDARD
ERROR
0.0001
0.0001
JD(min)
HEL.
2400000 +
52627.9188
52713.6862
52734.645
52762.9716
52780.6298
53119.6186
53406.8000
53435.7141
53494.7003
53834.6582
CYCLE
O-C
33447
33668
33722
33795
33840.5
34714
35454
35528.5
35680.5
36556.5
0.0133
0.0148
0.017
0.0140
0.0145
0.0147
0.0163
0.0183
0.0162
0.0153
N
30
33
14
165
20
49
40
75
50
62
OBSERVER
S.
G.
C.
N.
R.
G.
S.
G.
J.
G.
Dvorak (CCD)
Samolyk (CCD)
Stephan
Butterworth (CCD)
Poklar (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Bialozynski (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0003
0.0001
0.0004
0.0002
0.0001
0.0003
0.0006
0.0002
JD(min)
HEL.
2400000 +
52029.6317
52048.6898
52370.7491
52734.660
52780.6206
52796.679 :
52817.9834
53479.673
53513.672
CYCLE
14721
14746.5
15177.5
15664.5
15726
15747.5
15776
16661.5
16707
O-C
-0.0505
-0.0473
-0.0536
-0.055
-0.0499
-0.057
-0.0497
-0.052
-0.053
N
OBSERVER
46
59
79
18
39
G. Samolyk (CCD)
G. Samolyk (CCD)
G. Samolyk (CCD)
C. Stephan
G. Samolyk (CCD)
G. Samolyk (CCD)
N Butterworth (CCD)
S. Cook (CCD)
S. Cook (CCD)
141
28
15
STANDARD
ERROR
0.0006
0.0011
0.0010
0.0007
0.005
0.0002
JD(min)
HEL.
2400000 +
49929.758
49992.789
50284.759
50984.819 :
51097.621
51097.628
51369.6802
52507.698
53270.789
53645.7052
CYCLE
O-C
N
OBSERVER
2879
2898
2986
3197
3231
3231
3313
3656
3886
3999
0.015
0.008
0.015
0.026
0.023
0.030
0.0255
0.049
0.053
0.0485
14
17
17
19
20
24
M.
R.
G.
R.
D.
G.
J.
M.
R.
G.
17
26
66
Baldwin
Hill
Samolyk
Hill
Williams
Samolyk
A. Howell (CCD)
Simonsen
Hill
Samolyk (CCD)
STANDARD
ERROR
0.0008
0.0001
JD(min)
HEL.
2400000 +
52883.580
52899.5754
52931.5563
52975.533
53264.695
53284.685
53288.6835
53288.684
53340.652
53589.8430
CYCLE
8513
8525
8549
8582
8799
8814
8817
8817
8856
9043
O-C
-0.004
0.0006
0.0000
0.002
-0.002
-0.001
0.0000
0.000
-0.002
0.0000
N
OBSERVER
13
46
18
12
16
14
51
10
19
67
C.
G.
B.
R.
S.
R.
G.
C.
S.
G.
Stephan
Samolyk (CCD)
Manske (CCD)
Hays
Cook (CCD)
Hays
Samolyk (CCD)
Stephan
Cook (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0002
0.0009
0.0001
0.0001
JD(min)
HEL.
2400000 +
52833.761
52883.630
52931.5884
52931.592
52986.4968
53232.6435
53275.562
53302.700
53321.636
53335.5224
53581.6689
53591.768
53624.5844
CYCLE
O-C
21245
21324
21400
21400
21487
21877
21945
21988
22018
22040
22430
22446
22498
0.048
0.057
0.0489
0.052
0.0480
0.0497
0.051
0.050
0.051
0.0527
0.0542
0.055
0.0521
N
11
14
22
13
58
44
14
22
26
104
82
13
38
OBSERVER
D.
C.
S.
D.
S.
H.
G.
S.
S.
S.
G.
C.
H.
Williams
Stephan
Dvorak (CCD)
Williams
Dvorak (CCD)
Gerner (CCD)
Chaple
Cook (CCD)
Cook (CCD)
Dvorak (CCD)
Samolyk (CCD)
Stephan
Gerner (CCD)
STANDARD
ERROR
0.0001
0.0001
0.0003
0.0001
0.0001
0.0002
JD(min)
HEL.
2400000 +
52469.7080
52562.5943
53175.6467
53253.800
53257.6423
53289.672
53341.5615
53348.608
53565.773
CYCLE
O-C
38221
38366
39323
39445
39451
39501
39582
39593
39932
0.0120
0.0118
0.0135
0.014
0.0127
0.013
0.0138
0.014
0.017
N
112
61
32
29
26
15
51
23
15
OBSERVER
C.
G.
G.
C.
S.
C.
G.
S.
C.
Hesseltine (CCD)
Samolyk (CCD)
Samolyk (CCD)
Stephan
Cook (CCD)
Stephan
Samolyk (CCD)
Cook (CCD)
Stephan
STANDARD
ERROR
0.0001
0.0003
0.0004
0.0001
JD(min)
HEL.
2400000 +
51734.833
51814.6242
51814.626
52525.7596
52950.5638
53255.6708
53269.753
53302.610
53553.7383
CYCLE
3215
3249
3249
3552
3733
3863
3869
3883
3990
O-C
-0.006
-0.0122
-0.010
-0.0149
-0.0160
-0.0178
-0.018
-0.018
-0.0181
N
OBSERVER
12
D.
J.
R.
G.
G.
J.
S.
S.
J.
9
66
66
75
19
18
71
Williams
A. Howell (CCD)
Berg
Samolyk (CCD)
Samolyk (CCD)
Bialozynski (CCD)
Cook (CCD)
Cook (CCD)
Bialozynski (CCD)
STANDARD
ERROR
0.0001
0.0002
0.0001
0.0004
0.0003
JD(min)
HEL.
2400000 +
50305.643
50661.655
51132.528
51370.813
51419.621
52556.584
52881.0034
52909.712
53265.732
53268.605
53644.7278
CYCLE
1767
1891
2055
2138
2155
2551
2664
2674
2798
2799
2930
O-C
-0.043
-0.050
-0.041
-0.058
-0.059
-0.060
-0.0766
-0.079
-0.078
-0.076
-0.0699
N
OBSERVER
13
10
9
10
M.
M.
M.
D.
J.
C.
N.
R.
S.
D.
C.
18
14
14
11
109
Baldwin
Baldwin
Baldwin
Williams
A. Howell (CCD)
Stephan
Butterworth (CCD)
Hill
Cook (CCD)
Williams
Hesseltine (CCD)
STANDARD
ERROR
0.0031
0.0003
0.0002
JD(min)
HEL.
2400000 +
52557.5896
52908.9715
52931.604
53249.648
53262.733
53274.653
53286.563
53311.579
53617.6938
53617.697
53623.6486
53685.595
CYCLE
O-C
N
OBSERVER
8058
8353
8372
8639
8650
8660
8670
8691
8948
8948
8953
9005
0.0441
0.0436
0.045
0.058
0.040
0.049
0.048
0.050
0.0454
0.049
0.0446
0.052
56
G. Samolyk (CCD)
N Butterworth (CCD)
D. Williams
R. Hays
R. Hill
D. Williams
G. Chaple
G. Chaple
G. Samolyk (CCD)
D. Williams
S. Cook (CCD)
R. Hays
12
13
23
14
22
20
44
16
34
13
STANDARD
ERROR
0.0002
0.0001
0.0001
JD(min)
HEL.
2400000 +
52931.554
52931.556
53168.8700
53246.4074
53256.5893
53256.594
53259.726
53263.6384
53314.5480
53617.656
53617.656
53621.573
53624.7029
53653.685
53931.7226
CYCLE
27588
27588
27891
27990
28003
28003
28007
28012
28077
28464
28464
28469
28473
28510
28865
O-C
-0.044
-0.042
-0.0416
-0.0423
-0.0421
-0.037
-0.038
-0.0420
-0.0412
-0.036
-0.036
-0.036
-0.0385
-0.035
-0.0381
N
OBSERVER
10
10
66
60
34
11
14
38
44
11
14
12
62
19
48
D.
M.
S.
R.
G.
R.
D.
S.
G.
D.
R.
G.
H.
C.
G.
Williams
Baldwin
Dvorak (CCD)
Papini (CCD)
Samolyk (CCD)
Hays
Williams
Cook (CCD)
Samolyk (CCD)
Williams
Hays
Chaple
Gerner (CCD)
Stephan
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0006
0.0002
0.0001
0.0001
0.0001
JD(min)
HEL.
2400000 +
52556.537
52758.793
52792.728
52796.800
53050.6368
53149.731
53274.6128
53445.6484
53540.671
53722.5643
53844.7331
CYCLE
1998
2147
2172
2175
2362
2435
2527
2653
2723
2857
2947
O-C
-0.021
-0.022
-0.023
-0.024
-0.0273
-0.026
-0.0282
-0.0295
-0.027
-0.0305
-0.0309
N
OBSERVER
18
23
12
17
52
20
65
75
14
65
93
G.
R.
R.
R.
G.
R.
G.
J.
D.
G.
R.
Chaple
Hill
Hill
Hill
Samolyk (CCD)
Hill
Samolyk (CCD)
Bialozynski (CCD)
Williams
Samolyk (CCD)
Poklar (CCD)
STANDARD
ERROR
0.0001
0.0001
0.0001
0.0001
0.0001
JD(min)
HEL.
2400000 +
53288.7832
53365.6212
53366.5858
53373.667
53391.666
53414.649
53725.6993
53758.655
53761.5449
53776.665
CYCLE
O-C
36414.5
36653.5
36656.5
36678.5
36734.5
36806
37773.5
37876
37885
37932
0.1105
0.1114
0.1115
0.120
0.115
0.111
0.1160
0.119
0.1150
0.125
N
39
25
110
15
16
32
46
16
54
16
OBSERVER
G.
C.
S.
C.
C.
S.
R.
C.
G.
C.
Samolyk (CCD)
Norris (CCD)
Dvorak (CCD)
Stephan
Stephan
Cook (CCD)
Poklar (CCD)
Stephan
Samolyk (CCD)
Stephan
STANDARD
ERROR
0.0003
0.0015
0.0001
0.0002
0.0004
JD(min)
HEL.
2400000 +
47332.603 4)
48486.524
49480.748
49500.702
50578.750
50634.647 5)
51732.6854 6)
52810.7401
53884.8099
53932.7240
CYCLE
8577
8866
9115
9120
9390
9404
9679
9949
10218
10230
O-C
-0.043
-0.044
-0.029
-0.039
-0.049
-0.051
-0.0348
-0.0382
-0.0337
-0.0333
N
40
9
25
16
25
13
120
52
110
81
OBSERVER
STANDARD
ERROR
G.
A.
G.
G.
G.
S.
G.
G.
G.
G.
0.0007
0.0008
0.0003
0.0002
Samolyk
Filho
Samolyk
Samolyk
Samolyk
Cook (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
4) Observations combined From 47276 to 47391
5) Observations combined from 50602 to 50666
6) Observations combined from 51720 to 51748
JD(min)
HEL.
2400000 +
53109.858
53200.671
53259.577
53263.670
53268.577
53272.6644
53528.730
53560.639
53673.538
CYCLE
13746
13857
13929
13934
13940
13945
14258
14297
14435
O-C
-0.026
-0.022
-0.019
-0.017
-0.018
-0.0213
-0.020
-0.017
-0.016
N
OBSERVER
13
13
20
10
13
49
13
11
11
R.
R.
G.
R.
D.
S.
R.
D.
R.
Hays
Hays
Chaple
Hill
Williams
Cook (CCD)
Hays
Williams
Hays
JD(min)
HEL.
2400000 +
50578.789
50963.745
52059.6706
52104.754
52529.5934
52874.6654
53545.7433
53552.679
53798.9162
CYCLE
O-C
N
OBSERVER
6292
6514
7146
7172
7417
7616
8003
8007
8149
0.083
0.089
0.1232
0.122
0.1304
0.1352
0.1529
0.153
0.1609
21
22
68
17
39
88
65
28
65
G.
G.
G.
G.
G.
C.
J.
S.
G.
Samolyk
Samolyk
Samolyk (CCD)
Samolyk
Samolyk (CCD)
Hesseltine (CCD)
Bialozynski (CCD)
Cook (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0001
0.0001
0.0001
0.0001
JD(min)
HEL.
2400000 +
52529.6117
52975.5307
53238.782
53281.7641
53351.606
53640.651
53682.553
53711.5656
53725.539
CYCLE
O-C
N
OBSERVER
6767
7182
7427
7467
7532
7801
7840
7867
7880
0.0434
0.0474
0.048
0.0499
0.050
0.056
0.052
0.0537
0.059
55
32
14
56
32
13
13
71
13
G.
G.
R.
G.
S.
R.
R.
G.
R.
Samolyk (CCD)
Samolyk (CCD)
Hays
Samolyk (CCD)
Cook (CCD)
Hays
Hays
Samolyk (CCD)
Hays
STANDARD
ERROR
0.0003
0.0002
0.0001
0.0002
JD(min)
HEL.
2400000 +
51231.595
51273.749
51951.566
51988.660
51993.719
53335.8450
53367.8805
53792.7707
CYCLE
3437
3462
3864
3886
3889
4685
4704
4956
O-C
0.011
0.013
0.017
0.017
0.017
0.0061
0.0057
-0.0018
N
11
16
14
16
14
175
92
116
OBSERVER
STANDARD
ERROR
M.
M.
G.
R.
D.
S.
S.
G.
0.0001
0.0001
0.0001
Baldwin
Baldwin
Samolyk
Hill
Williams
Dvorak (CCD)
Dvorak (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
51720.6931
52042.808
52042.8089
52045.6844
52426.7623
52810.7147
53529.730
53890.676
CYCLE
O-C
7347
7571
7571
7573
7838
8105
8605
8856
0.0596
0.063
0.0638
0.0633
0.0716
0.0785
0.095
0.1031
N
18
112
94
59
12
108
OBSERVER
J.
D.
G.
J.
G.
G.
S.
G.
A. Howell (CCD)
Williams
Samolyk (CCD)
A. Howell (CCD)
Samolyk (CCD)
Samolyk (CCD)
Cook (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0003
0.0003
0.0004
0.0002
0.0004
0.0002
JD(min)
HEL.
2400000 +
51363.6975
51439.697
51706.676
51706.677
51784.6192
52045.743
53148.722
53263.690
53267.595
53567.698
53910.6686
CYCLE
O-C
12759
12798
12935
12935
12975
13109
13675
13734
13736
13890
14066
0.2437
0.243
0.247
0.248
0.2413
0.236
0.238
0.231
0.239
0.239
0.2339
N
16
24
24
12
17
11
12
22
70
OBSERVER
J.
M.
P.
T.
J.
R.
R.
R.
D.
S.
G.
A. Howell (CCD)
Baldwin
Guilbault
Hager
A. Howell (CCD)
Hill
Hill
Hill
Williams
Cook (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0009
0.0002
0.0001
JD(min)
HEL.
2400000 +
52287.696
52310.570
52310.571
52310.572 :
52329.635
52371.5629
52695.598
53061.5638
53101.596
53406.569
53465.653
CYCLE
9762
9774
9774
9774
9784
9806
9976
10168
10189
10349
10380
O-C
-0.043
-0.042
-0.041
-0.040
-0.038
-0.0441
-0.045
-0.0493
-0.045
-0.047
-0.052
N
OBSERVER
21
18
15
11
11
42
16
56
12
16
13
G.
C.
R.
M.
D.
S.
R.
G.
R.
R.
R.
Samolyk
Stephan
Hays
Baldwin
Williams
Dvorak (CCD)
Hays
Samolyk (CCD)
Hays
Hays
Hays
STANDARD
ERROR
0.0001
0.0001
JD(min)
HEL.
2400000 +
51554.550
52220.7196
52291.5176
52299.5172
52575.9068
52965.8942
53363.6802
53381.681
53745.6679
CYCLE
18826
20491.5
20668.5
20688.5
21379.5
22354.5
23349
23394
24304
O-C
-0.056
-0.0641
-0.0637
-0.0639
-0.0650
-0.0645
-0.0652
-0.064
-0.0647
N
OBSERVER
12
66
33
29
17
23
53
10
73
S.
S.
S.
S.
S.
S.
G.
S.
R.
Cook (CCD)
Dvorak (CCD)
Dvorak (CCD)
Dvorak (CCD)
Dvorak (CCD)
Dvorak (CCD)
Samolyk (CCD)
Cook (CCD)
Poklar (CCD)
STANDARD
ERROR
0.0002
0.0002
0.0003
0.0006
0.0005
0.0004
0.0002
JD(min)
HEL.
2400000 +
52694.608
53035.6009
53314.9481
53323.8904
53368.6039
53413.7883
53435.6774
53735.7347
53763.7384
CYCLE
20448.5
21173
21766.5
21785.5
21880.5
21976.5
22023
22660.5
22720
O-C
-0.015
-0.0309
-0.0329
-0.0335
-0.0347
-0.0357
-0.0333
-0.0351
-0.0369
N
OBSERVER
STANDARD
ERROR
19
92
40
76
14
67
89
63
86
C.
G.
G.
G.
S.
G.
G.
R.
G.
0.0004
0.0005
0.0005
0.0004
0.0004
0.0005
0.0004
0.0003
Stephan
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
Samolyk (CCD)
Poklar (CCD)
Samolyk (CCD)
JD(min)
HEL.
2400000 +
52568.721
52585.5777
52968.5993
52998.584
53197.7758
53314.7069
53315.6414
53709.5302
CYCLE
42844
42889
43911
43991
44522.5
44834.5
44837
45888
O-C
-0.083
-0.0917
-0.0967
-0.095
-0.0990
-0.0998
-0.1022
-0.1087
N
OBSERVER
6
50
52
16
33
70
37
65
G.
J.
J.
G.
B.
G.
S.
G.
Sarty
A. Howell (CCD)
Bialozynski (CCD)
Samolyk
Manske (CCD)
Samolyk (CCD)
Dvorak (CCD)
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0003
0.0002
0.0002
0.0003
0.0002
JD(min)
HEL.
2400000 +
52986.5913
52993.711
53001.542
53267.7599
53285.557
53290.540
53292.679
53645.7354
53728.3061
CYCLE
10944
10954
10965
11339
11364
11371
11374
11870
11986
O-C
-0.0198
-0.018
-0.017
-0.0188
-0.017
-0.017
-0.013
-0.0180
-0.0181
N
OBSERVER
47
15
13
28
15
15
12
52
66
S.
G.
D.
G.
G.
G.
C.
G.
J.
Dvorak (CCD)
Samolyk
Williams
Samolyk (CCD)
Chaple
Chaple
Stephan
Samolyk (CCD)
Coloma (CCD)
STANDARD
ERROR
0.0001
0.0001
0.0001
0.0001
JD(min)
HEL.
2400000 +
43420.756
43469.581
43798.694
43876.660
44236.619
46028.744
50369.649
52586.7698 7)
52591.9106
52611.6230
53312.671
53456.6554
53834.6009
CYCLE
-2556
-2499
-2115
-2024
-1604
487
5552
8139
8145
8168
8986
9154
9595
O-C
-0.124
-0.149
-0.134
-0.157
-0.149
-0.063
0.010
0.0065
0.0052
0.0060
0.007
0.0116
0.0091
N
OBSERVER
7
9
11
11
11
17
12
35
G.
G.
G.
G.
G.
G.
S.
S.
T.
J.
S.
C.
C.
76
27
85
59
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Samolyk
Cook (CCD)
Dvorak (CCD)
Shoup (CCD)
A. Howell (CCD)
Cook (CCD)
Hesseltine (CCD)
Hesseltine (CCD)
7) Observations combined from 52586 and 52611
STANDARD
ERROR
0.0002
0.0003
0.0001
0.0005
0.0003
JD(min)
HEL.
2400000 +
51870.509
52204.5542
52220.6211
52645.5301
53061.5762
53238.8520
53303.6691
53683.711
53693.686
53945.7430
CYCLE
49620
50223
50252
51019
51770
52090
52207
52893
52911
53366
O-C
-0.027
-0.0384
-0.0372
-0.0397
-0.0412
-0.0426
-0.0425
-0.039
-0.036
-0.0447
N
OBSERVER
10
52
33
45
40
47
38
16
17
40
G.
G.
S.
S.
G.
G.
J.
C.
C.
G.
Samolyk
Samolyk (CCD)
Dvorak (CCD)
Dvorak (CCD)
Samolyk (CCD)
Samolyk (CCD)
Bialozynski (CCD)
Stephan
Stephan
Samolyk (CCD)
STANDARD
ERROR
0.0005
0.0002
0.0002
0.0004
0.0002
0.0004
0.0003
JD(min)
HEL.
2400000 +
51777.648
52133.682
52146.694
52489.724
52495.646
52883.612
53239.656
53265.676
CYCLE
6185
6486
6497
6787
6792
7120
7421
7443
O-C
-0.003
-0.014
-0.013
-0.016
-0.008
-0.024
-0.025
-0.028
N
OBSERVER
14
14
18
18
14
16
19
18
G.
D.
G.
G.
G.
C.
G.
G.
Samolyk
Williams
Samolyk
Samolyk
Samolyk
Stephan
Samolyk
Samolyk
JD(min)
HEL.
2400000 +
51930.5387
52265.562
52287.709
52312.628
52636.572
53314.9196
53353.6804
53414.5923
53699.773
53741.3048
53774.531
53785.604
53785.6047
CYCLE
2256
2377
2385
2394
2511
2756
2770
2792
2895
2910
2922
2926
2926
O-C
-0.1584
-0.164
-0.168
-0.168
-0.178
-0.1953
-0.1982
-0.2007
-0.210
-0.2108
-0.211
-0.213
-0.2123
N
OBSERVER
75
17
22
27
20
82
40
63
22
20
20
22
80
G.
C.
G.
G.
G.
G.
S.
J.
R.
R.
G.
R.
G.
Samolyk (CCD)
Stephan
Samolyk
Samolyk
Chaple
Samolyk (CCD)
Cook (CCD)
Bialozynski (CCD)
Hays
Papini (CCD)
Chaple
Hays
Samolyk (CCD)
STANDARD
ERROR
0.0001
0.0003
0.0003
0.0003
0.0001
JD(min)
HEL.
2400000 +
51867.344
51902.289
51912.582
51951.633
52268.307
52609.657
52615.819
52975.679
53672.768
CYCLE
O-C
N
OBSERVER
5151
5168
5173
5192
5346
5512
5515
5690
6029
0.022
0.010
0.022
0.003
0.007
0.011
0.004
0.012
0.015
9
12
22
22
10
20
19
24
25
S.
S.
G.
G.
S.
G.
G.
G.
G.
Foglia
Foglia
Samolyk
Samolyk
Foglia
Samolyk
Samolyk
Samolyk
Samolyk
JD(min)
HEL.
2400000 +
52900.674
52986.6965
53001.334
53315.5830
53315.592
53339.5759
53374.689
53384.635
53683.677
53714.6914
CYCLE
48575
48722
48747
49284
49284
49325
49385
49402
49913
49966
O-C
0.002
-0.0006
0.007
0.0003
0.009
-0.0003
0.001
-0.002
0.000
-0.0016
N
OBSERVER
14
46
8
50
24
79
19
16
17
40
M.
G.
M.
G.
G.
S.
C.
S.
C.
G.
Baldwin
Samolyk (CCD)
Csukas
Samolyk (CCD)
Chaple
Dvorak (CCD)
Stephan
Cook (CCD)
Stephan
Samolyk (CCD)
STANDARD
ERROR
0.0002
0.0001
0.0001
0.0003
JD(min)
HEL.
2400000 +
52675.615
53288.647
53289.618
53323.622
53324.591
53330.419
53357.6232
53359.5663
53392.597
53393.5696
53696.686
53767.603
CYCLE
10471
11102
11103
11138
11139
11145
11173
11175
11209
11210
11522
11595
O-C
-0.051
-0.058
-0.058
-0.058
-0.061
-0.062
-0.0606
-0.0606
-0.062
-0.0610
-0.064
-0.069
N
OBSERVER
11
12
12
24
24
35
R.
D.
R.
G.
G.
I.
C.
C.
S.
G.
R.
R.
36
52
14
14
Hays
Williams
Hays
Samolyk
Chaple
Megson
Haza (CCD)
Haza (CCD)
Cook (CCD)
Samolyk (CCD)
Hays
Hays
STANDARD
ERROR
0.0001
0.0001
0.0001
JD(min)
HEL.
2400000 +
53304.8951
53411.652
53414.491
53417.331
53451.696
53463.717
53472.712
53645.8709
53753.6362
53847.723
CYCLE
22597
22917
22925.5
22934
23037
23073
23100
23619
23942
24224
O-C
-0.0498
-0.057
-0.054
-0.050
-0.049
-0.039
-0.053
-0.0515
-0.0511
-0.050
N
OBSERVER
88
11
11
35
27
15
24
30
46
16
S.
S.
S.
I.
S.
D.
S.
G.
R.
C.
Dvorak (CCD)
Cook (CCD)
Cook (CCD)
Megson
Cook (CCD)
Williams
Cook (CCD)
Samolyk (CCD)
Poklar (CCD)
Stephan
STANDARD
ERROR
0.0001
0.0003
0.0006
JD(min)
HEL.
2400000 +
52723.662
52756.662
53002.349
53080.579
53394.7053
53421.595
53432.5961
53460.710
53471.713 :
CYCLE
5363
5390
5591
5655
5912
5934
5943
5966
5975
O-C
-0.066
-0.069
-0.068
-0.067
-0.0765
-0.078
-0.0777
-0.077
-0.075
N
18
13
14
18
191
19
62
26
15
OBSERVER
C.
D.
J.
G.
S.
G.
G.
S.
R.
Stephan
Williams
Virtanen
Chaple
Dvorak (CCD)
Chaple
Samolyk (CCD)
Cook (CCD)
Hill
STANDARD
ERROR
0.0001
0.0002
JD(min)
HEL.
2400000 +
52723.712
52920.5572
53195.6176
53430.782
53463.865
53544.693
53616.614
53691.670
53765.6883
CYCLE
21198
21573
22097
22545
22608
22762
22899
23042
23183
O-C
-0.010
-0.0118
-0.0127
-0.015
-0.003
-0.013
-0.007
-0.016
-0.0118
N
OBSERVER
15
50
32
15
13
39
20
14
86
C.
G.
G.
S.
D.
S.
G.
C.
R.
Stephan
Samolyk (CCD)
Samolyk (CCD)
Cook (CCD)
Williams
Cook (CCD)
Chaple
Stephan
Poklar (CCD)
STANDARD
ERROR
0.0002
0.0003
0.0002
JD(min)
HEL.
2400000 +
50572.792
50921.674
50991.709
51679.6436
52042.7965
52398.8091
52779.816
53077.8242
53148.750
53500.760
53882.6510
53890.6806
CYCLE
O-C
N
OBSERVER
43376
44158
44315
45857
46671
47469
48323
48991
49150
49939
50795
50813
-0.011
-0.007
-0.016
-0.0224
-0.0240
-0.0278
-0.021
-0.0313
-0.041
-0.032
-0.0334
-0.0343
18
15
11
31
43
36
26
42
17
16
65
50
G.
G.
R.
G.
G.
G.
R.
G.
R.
R.
G.
C.
Samolyk
Samolyk
Hill
Samolyk (CCD)
Samolyk (CCD)
Samolyk (CCD)
Hill
Samolyk (CCD)
Hill
Hill
Samolyk (CCD)
Hesseltine (CCD)
STANDARD
ERROR
0.0003
0.0002
0.0002
0.0002
0.0003
0.0002