+66°00'
Zone 46, Master Map
Zone Master, Normal View, 10 deg FOV
Draco
+60°00'
+62°00'
c
e
+64°00'
Ursa Major
+58°00'
d
M40
f
13h 00m
+56°00'
ε
δ Megrez
Alioth
12h 48m
12h 36m
12h 24m
12h 12m
12h 00m
Zone 46, Map 1
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 4256
+65°00'
Ursa Major
NGC 4125
STF 1667
Bur 1432
STF 1640 rej
+64°00'
Stein 739
NGC 4081
Draco
Milburn 209
NGC 4041
+61°00'
NGC 4036
+62°00'
+63°00'
NGC 4545
Stein 736
+59°00'
Stein 743
STF 1660
12h 32m
W innecke 4 M40
NGC 4290
12h 24m
12h 16m
12h 08m
+60°00'
h2598
12h 00m
Zone 46, Map 1
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 4256
+65°00'
Ursa Major
NGC 4125
+64°00'
Stein 739
NGC 4081
Draco
STF 1640 rej
NGC 4545
+63°00'
Bur 1432
+62°00'
Milburn 209
NGC 4041
+61°00'
NGC 4036
Stein 735
NGC 3945
+60°00'
h2598
Stein 736
+59°00'
Stein 743
NGC 3958
12h 00m
12h 08m
12h 16m
W innecke 4
M40
NGC 4290
12h 24m
12h 32m
Zone 46, Map 2
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Stein 736
+60°00'
h2598
W innecke 4
M40
NGC 4290
Delta UMa δ
Ball 29 Megrez
+57°00'
STF 1660
+58°00'
+59°00'
Stein 743
A 1358
+56°00'
STF 1630
Milburn 67
Espin 73
+54°00'
h2605
Stein 2285
NGC 3998
+55°00'
STF 1603
OS 249
Espin 726
STF 1608
12h 32m
12h 24m
12h 16m
12h 08m
OS 243
12h 00m
Zone 46, Map 2
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 3945
+60°00'
h2598
Stein 736
+59°00'
Stein 743
A 1358
M40
NGC 4290
+57°00'
W innecke 4
+58°00'
NGC 3958
δ Megrez
Delta UMa Ball 29
STF 1603
+55°00'
NGC 3990
MCG +09-20-046
+56°00'
STF 1630 Milburn 67
NGC 3982
h2605
Stein 2285
+54°00'
Espin 73
OS 249
M109 OS 243
NGC 3992
12h 00m
STF 1608
12h 08m
12h 16m
12h 24m
12h 32m
Zone 46, Map 3
Normal Image
+65°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 1640 rej
Bur 1432
+64°00'
STF 1667
+62°00'
+63°00'
NGC 4545
NGC 5007
+59°00'
+60°00'
+61°00'
NGC 4605
h2628
STF 1660
STF 1691
13h 04m
12h 56m
12h 48m
Stein 2289
12h 40m
12h 32m
12h 24m
Zone 46, Map 3
Mirror Image
+65°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 4256
+64°00'
STF 1667
STF 1640 rej
Bur 1432
+62°00'
+63°00'
NGC 4545
+59°00'
+60°00'
+61°00'
NGC 4605
h2628
STF 1660
STF 1691
12h 24m
12h 32m
Stein 2289
12h 40m
12h 48m
12h 56m
13h 04m
Zone 46, Map 4
Normal Image
+59°00'
+60°00'
+61°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+58°00'
h2628
STF 1660
STF 1691
+57°00'
Stein 2289
STF 1662
Stein 2285
STF 1695
Espin 726
13h 04m
12h 56m
12h 48m
12h 40m
12h 32m
+55°00'
Alioth
+54°00'
ε
+56°00'
78 UMa
Zone 46, Map 4
Mirror Image
+59°00'
+60°00'
+61°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+58°00'
h2628
STF 1660
STF 1691
+57°00'
Stein 2289
STF 1662
Alioth
Stein 2285
STF 1695
Espin 726
12h 32m
12h 40m
12h 48m
12h 56m
+54°00'
+55°00'
ε
+56°00'
78 UMa
13h 04m
Zone 46
Index
15 Double Stars; 6 Galaxies
A
NGC 4041.................................................. 5
NGC 4081.................................................. 6
NGC 4290................................................ 12
NGC 4545................................................ 14
NGC 4605................................................ 14
A 1358........................................................ 7
B
Bur 1432 .................................................... 4
D
S
Delta UMa ................................................. 9
Stein 739 .................................................... 2
STF 1603 ................................................... 8
STF 1630 ................................................. 11
STF 1640 rej.............................................. 3
STF 1662 ................................................. 15
STF 1667 ................................................. 13
STF 1691 ................................................. 16
H
h2598 .......................................................... 2
h2605 .......................................................... 8
h2628 ........................................................ 16
M
Milburn 209 ............................................... 4
W
N
Winnecke 4 .............................................. 10
NGC 4036.................................................. 6
-1-
Zone 46
Zone 46, Map 1
Double Stars
Easy
Stein 739
Rating: 5 E
Position: 1204+6430
A
B
Magnitude
10.56
10.82
Separation PA
—
—
9.9 +
242 +!!
Year
—
1991
Spectra
Colors
bW
bW
Notes:
1893: 9.4 @ 49. 7 measurements. The stars have different proper motions.
Observations:
C8 at 104x. Moderately rich field.
Distance (LY): 108
Total luminosity (Suns): 0.14
h2598
Rating: 5 E
Position: 1208+6030
A
B
Magnitude
10.36
12.94
Separation PA
—
—
31.1 24 =
Notes:
1906: 33.5 @ 24. 6 measurements.
There are two more very faint comes.
Observations:
C8 at 104x.
-2-
Year
—
1991
Spectra
K0 III
Colors
Y
W
Zone 46
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 480 miles.
Distance (LY): 9,900
Total luminosity (Suns): 554
STF 1640 rej
Other name(s): HD 108040; SAO 15796
Rating: 4 E
Position: 1224+6348
A
B
Magnitude
8.57
10.80
Separation PA
—
—
36.4 +
244 +
Year
—
1991
Notes:
1894: 30.3 @ 238. 5 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 25.2 inches.
Separation: AB = 122 miles.
Distance (LY): 2,150
Total luminosity (Suns): 217
-3-
Spectra
K0
Colors
Y
W
Zone 46
Bur 1432
Other name(s): HD 108150; SAO 15801
Rating: 5 E
Position: 1225+6348
A
B
Magnitude
6.32
12.33
Separation PA
—
—
52.3
245
Year
—
1905
Spectra
G8 III
Colors
yW
?
Notes:
1 measurement.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 43.5 inches.
Separation: AB = 42.4 miles.
Distance (LY): 520
Total luminosity (Suns): 64
Moderate
Milburn 209
Other name(s): Espin 2640 (C); ADS 8411; SAO 15707
Rating: 4 M
Position: 1205+6258
A
B
C
Magnitude
9.86
11.50
13.50
Separation
—
6.3 =
34.7
PA
—
36 +
78
Notes:
AB 1907: 6.3 @ 31. 6 measurements.
AC 1 measurement.
Observations:
C11 at 115x. A nice Y star lies 2 min east.
-4-
Year
—
1993
1921
Spectra
G5
Colors
W
B?
?
Zone 46
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 21.5 inches.
Separation: AB = 3,643 feet; AC = 3.84 miles.
Distance (LY): 71
Total luminosity (Suns): 0.057
Deep Sky Objects
Moderate
NGC 4041
Other Names: UGC 7014, H I 252
Rating: 5 M
Position: 1202+6208
Type : Gal
Surface brightness: 13.2
Class: SA(rs)bc:
Dimensions: 3'
Magnitude : 11.7
Notes:
This galaxy produced supernova 1994W (type II).
Observations:
C8 at 65x. It is small, faint and round. It has a bright nucleus, but no other details.
Model (where the Sun is a baseball):
Its diameter would be 25 million miles.
Distance (LY): 88,000,000
Radial velocity (km/sec): +1,234
Luminosity (suns): 12,700,000,000
-5-
Zone 46
NGC 4081
Other Names: UGC 7062
Rating: 5 M
Position: 1205+6427
Type : Gal
Surface brightness: 12.8
Class: Sa?
Dimensions: 1.8' x 0.8'
Magnitude : 12.9
PA: 135
Observations:
C8 at 104x. Sharp nucleus but no halo. It was stellar.
Distance: 35,000,000 light years
Radial velocity (km/sec): +1,444
Luminosity: 700,000,000 Suns
Difficult
NGC 4036
Other Names: UGC 7005, H I 253
Rating: 5 D
Position: 1201+6154
Type : Gal
Surface brightness: 12.7
Class: S0Dimensions: 3' x 1'
Magnitude : 11.6
PA: 85
Observations:
C8 at 65x. Small and faint, with an E-W axis.
Model (where the Sun is a baseball):
Its diameter would be 27 million miles (43.5 million km).
Distance (LY): 95,000,000
Radial velocity (km/sec): +1,506
Luminosity (suns): 16,200,000,000
-6-
Zone 46
Zone 46, Map 2
Double Stars
Easy
A 1358
Other name(s): HD 238069; SAO 28243
Rating: 4 E
Position: 1206+5659
A
B
C
Magnitude
9.17
10.00
11.50
Separation
—
0.5 35.0 +
PA
—
42 -?
172 =
Year
—
1992
1952
Notes:
AB 1906: 0.8 @ 226. 12 measurements. Quadrant reversa?
AC 1948: 34.5 @ 172. 2 measurements.
Observations:
C8 at 104x. Very, very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.8 inches.
Separation: AB = 1,373 feet; AC = 18.9 miles.
Distance (LY): 346
Total luminosity (Suns): 1.234
-7-
Spectra
G5
Colors
W
No
rO
Zone 46
STF 1603
Other name(s): ADS 8434; HD 105421; SAO 28253
Rating: 3 E
Position: 1208+5528
A
B
Magnitude
7.79
8.45
Separation PA
—
—
22.0 84 +
Year
—
1998
Spectra
F8 V
F8 V
Colors
W
W
Notes:
1832: 22.4 @ 81. 59 measurements. The stars share a large common proper motion.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.60 inches; B = 15.4 inches.
Separation: AB = 5.76 miles.
Distance (LY): 168
Total luminosity (Suns): 2.7
h2605
Other name(s):
Rating: 5 E
Position: 1215+5501
A
B
Magnitude
11.78
12.94
Separation PA
—
—
17.7
320
Notes:
1 measurement.
Observations:
C8 at 104x.
-8-
Year
—
1908
Spectra
Colors
W
?
Zone 46
Delta UMa
Rating: 4 E
Other name(s): 69 UMa; Megrez; Ball 29; HD 106591; SAO 28315
Position: 1215+5702
A
B
C
Magnitude
3.32
10.32
11.05
Separation
—
182.9 176.6 -
PA
—
72 126 +
Year
—
1987
1987
Spectra
A2 V
Colors
bW
W
W
Notes:
AB 1878: 192.4 @ 73. 5 measurements.
AC 1879: 188.6 @ 124. 3 measurements.
This star is a member of the Ursa Major moving stream.
The primary rotates at 177 kps.
From James Kaler's Star Notes:
This rather ordinary class A (A3) hydrogen-fusing dwarf glows whitely with a
temperature of 8,630 Kelvin, about half again hotter than our Sun. We calculate a radius
double that of the Sun.
Like the middle stars of the Dipper, Megrez is part of the sprawling Ursa Major
cluster, all five moving through space together at about the same distance, Megrez just a
half light year farther than the average of the five.
From Megrez, the Dipper's handle stars Alioth and Mizar (as well as Alcor) would be
almost aligned, Alioth appearing almost as bright as Venus in our sky. Yet for all its
seeming ordinariness, Megrez still tells a tale of how sensitive the stars are to surface
temperature and mass. Though Megrez carries only twice the mass of the Sun, it is over
20 times more luminous, the result of higher internal gravitational compression and
temperature.
Comparison to the Dipper's brightest star, Alioth, tells a similar story. Though Alioth
has only half again the mass of Megrez, it radiates almost five times the luminosity. The
comparisons vividly show the effect of the "mass-luminosity" relation that is derived
from the masses of double stars. In the middle of the stellar temperature range, the
luminosity is sensitive to greater than the third power of the mass. Though Megrez has
exactly the same spectral class as Denebola, it is 60 percent more luminous, the result of
slightly higher mass and greater age (age slowly brightening these stars). Actual age
measurement agrees, by showing Megrez (and the other central Dipper stars) to be about
50 million years old (roughly half way through its hydrogen-fusing lifetime), whereas
Denebola is around 20 million years old. Megrez has been searched for a surrounding
dusty disk of the kind found around several stars of its class (from which planets might
presumably have formed), including Denebola and the Dipper's Merak, but nothing has
been found.
-9-
Zone 46
Megrez's only claim to any sort of distinction is that it has been accused of having
faded over the centuries, as Tycho Brahe called it second magnitude. Several stars are
steeped in such lore, which is most likely false, as the evidence is so thin.
Observations:
C8 at 104x.
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 23.1 miles; AC = 22.3 miles.
Distance (LY): 81
Total luminosity (Suns): 25
Winnecke 4
Other name(s): HD 238107; SAO 28353; M40
Rating: 4 E
Position: 1222+5805
A
B
Magnitude
9.74
10.18
Separation PA
—
—
52.4 +
78 -
Year
—
1991
Spectra
G0
F8
Colors
R
B
Notes:
1863: 49.2 @ 88. 13 measurements.
Messier added it to his catalog on October 24, 1764 while searching for a nebula
mistakenly reported by Hevelius in 1660. (Hevelius may have made the same mistake as
Messier of seeing this faint pair as a nebula. In fact, he described it as a "nebulous star."
However, Mallas and Kreimer assert that Hevelius actually observed 74 UMa, a 5th mag
star more than a degree away.)
Much has been made about this being one of Messier's mistakes, but his own
description is plain on the subject: "Two stars very close to each other and very small...
they are difficult to distinguish with an ordinary telescope of 6 feet [f.l.]."
The object was viewed again at Pulkovo Observatory in 1863, when the separation
was 49" and the PA was 88.
The stars have different proper motions.
Observations:
C8 at 104x. (3/11/89; s5, t3) Faint and disappointing.
- 10 -
Zone 46
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.7 inches; B = 16.9 inches.
Separation: AB = 41.7 miles.
Distance (LY): 510
Total luminosity (Suns): 5
Moderate
STF 1630
Other name(s): ADS 8507; SAO 28334
Rating: 5 M
Position: 1219+5622
A
B
Magnitude
9.03
9.71
Separation PA
—
—
2.4 +
169 +
Year
—
1998
Notes:
1832: 2.3 @ 167. 16 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.0 inches.
Separation: AB = 1.71 miles.
Distance (LY): 458
Total luminosity (Suns): 7
- 11 -
Spectra
G0
Colors
Y
W
Zone 46
Deep Sky Objects
Moderate
NGC 4290
Other Names: UGC 7402, H II 805
Rating: 5 M
Position: 1221+5800
Type : Gal
Surface brightness: 13.2
Class: SBb
Dimensions: 2' x 1'
Magnitude : 12.7
PA: 90
Observations:
C8 at 65x. You must get 70 UMa out of the field first! The axis runs E-W, and the
nucleus is obvious.
C11 at 98x. It is a small fuzz ball with a much brighter center. It lies about 20 min W
of M40.
Model (where the Sun is a baseball):
Its diameter would be 34 million miles (55 million km).
Distance (LY): 130,000,000
Luminosity (suns): 11,100,000,000
- 12 -
Zone 46
Zone 46, Map 3
Double Stars
Difficult
STF 1667
Other name(s): ADS 8620; SAO 15860
Rating: 5 D
Position: 1240+6440
A
B
C
Magnitude
9.62
10.04
11.94
Separation
—
1.2 +
44.3
PA
—
41 +
261
Year
—
1991
1906
Notes:
AB 1832: 1.1 @ 39. 13 measurements.
AC 1 measurement.
Observations:
C11 at 634x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.3 inches.
Separation: AB = 1.81 miles; AC = 67.1 miles.
Distance (LY): 970
Total luminosity (Suns): 32
- 13 -
Spectra
F5
Colors
W
W
?
Zone 46
Deep Sky Objects
Easy
NGC 4605
Other Names: UGC 7831, H I 254
Rating: 2 E
Position: 1240+6137
Type : Gal
Surface brightness: 13.1
Class: Sc
Dimensions: 4' x 1'
Magnitude : 10.9
PA: 125
Observations:
C8 at 65x. Bright and long (with an SE-NW axis); it shows some mottling at medium
powers. It lies 34 min N of an acute 6m-7m quadrilateral that runs E and W.
C11 at 115x. Large bright spindle that gradually brightens to the center.
Distance: 12,000,000 light years
Radial velocity (km/sec): +275
Luminosity: 500,000,000 Suns
Difficult
NGC 4545
Other Names: UGC 7747
Rating: 5 D
Position: 1235+6331
Type : Gal
Surface brightness: 13.7
Class: SB(s)cd: II
Dimensions: 2.7' x 1.5'
Notes:
This galaxy produced supernova 1940D.
Observations:
C11 at 115x. Very faint wisp with no details.
Radial velocity (km/sec): 2,860
- 14 -
Magnitude : 12.3
PA: 8
Zone 46
Zone 46, Map 4
Double Stars
Easy
STF 1662
Other name(s): ADS 8605; HD 109654; SAO 28438
Rating: 3 E
Position: 1236+5635
A
B
Magnitude
7.71
10.40
Separation PA
—
—
19.4 240 +
Year
—
1991
Spectra
K0 III
K
Colors
Y
B
Notes:
1831: 20.2 @ 230. 16 measurements. The stars have a small difference in proper
motion.
Observations:
C8 at 104x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 39.2 miles; AC = 26.6 miles.
Distance (LY): 880
Total luminosity (Suns): 54
- 15 -
Zone 46
STF 1691
Other name(s): ADS 8702; HD 238169; SAO 28561
Rating: 4 E
Position: 1255+5806
A
B
C
Magnitude
8.57
9.85
9.70
Separation
—
18.6 131.0
PA
—
275 86
Year
—
1991
1910
Spectra
F0 IV
G5
K2
Colors
O
B
?
Notes:
AB 1831: 19.1 @ 277. 15 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. However, the stars exhibit common proper
motion.
AC 1 measurement.
Observations:
C8 at 65x.
Distance (LY): 345
Total luminosity (Suns): 5
h2628
Other name(s): HD 112798; SAO 28586
Rating: 4 E
Position: 1258+5822
A
B
Magnitude
8.39
10.46
Separation PA
—
—
31.2 +
27 -
Notes:
1902: 30.8 @ 34. 12 measurements.
The stars show similar proper motions.
Observations:
C8 at 104x.
- 16 -
Year
—
1991
Spectra
F5
Colors
W
rO
Zone 46
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.4 inches.
Separation: AB = 19.7 miles.
Distance (LY): 405
Total luminosity (Suns): 7
- 17 -
Zone 46
Zone 46 Mini-Catalog
Double Stars
Star
Designation
Position
Rating
Map
STF 1603
1208+5528
3E
2
STF 1662
1236+5635
3E
4
A 1358
1206+5659
4E
2
Delta UMa
1215+5702
4E
2
Winnecke 4
1222+5805
4E
2
STF 1640 rej
1224+6348
4E
1
STF 1691
1255+5806
4E
4
h2628
1258+5822
4E
4
Stein 739
1204+6430
5E
1
h2598
1208+6030
5E
1
h2605
1215+5501
5E
2
Bur 1432
1225+6348
5E
1
Milburn 209
1205+6258
4M
1
STF 1630
1219+5622
5M
2
STF 1667
1240+6440
5D
3
Component
A
B
A
B
A
B
C
A
B
C
A
B
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
C
- 18 -
Specifications
Mag
Sep from A
7.79
—
8.45
22.0 7.71
—
10.40
19.4 9.17
—
10.00
0.5 11.50
35.0 +
3.32
—
10.32
182.9 11.05
176.6 9.74
—
10.18
52.4 +
8.57
—
10.80
36.4 +
8.57
—
9.85
18.6 9.70
131.0
8.39
—
10.46
31.2 +
10.56
—
10.82
9.9 +
10.36
—
12.94
31.1 11.78
—
12.94
17.7
6.32
—
12.33
52.3
9.86
—
11.50
6.3 =
13.50
34.7
9.03
—
9.71
2.4 +
9.62
—
10.04
1.2 +
11.94
44.3
PA from A
—
84 +
—
240 +
—
42 -?
35.0 +
—
72 176.6 —
78 —
244 +
—
275 131.0
—
27 —
242 +!!
—
24 =
—
320
—
245
—
36 +
34.7
—
169 +
—
41 +
44.3
Zone 46
Deep Sky Objects
Object
NGC 4605
NGC 4041
NGC 4081
NGC 4290
NGC 4036
NGC 4545
Position
1240+6137
1202+6208
1205+6427
1221+5800
1201+6154
1235+6331
Rating
2E
5M
5M
5M
5D
5D
Map
3
1
1
2
1
3
Type
Gal (Sc)
Gal (SA(rs)bc:)
Gal (Sa?)
Gal (SBb)
Gal (S0)
Gal (SB(s)cd: II)
- 19 -
Specifications
Surface
Mag
Br
10.9
13.1
11.7
13.2
12.9
12.8
12.7
13.2
11.6
12.7
12.3
13.7
Population