Sky & Telescope - January 2025 - 56

JANUARY 2025 OBSERVING
Suburban Stargazer
125
118
103
+24°
121
AG 313
1746
τ
+22°
ζ
106
+20°
ΟΣ 95
1647
119
120
+18°
122
Σ730
+16°
116
15
ORION
5h 30m
5h 20m
5h 10m
11
ρ
5h 00m
ο1
4h 50m
4h 40m
pTAURUS TARGETS Numerous 4th-, 5th-, and 6th-magnitude stars lie along the route to four modest star clusters in eastern Taurus. Observers
whose telescopes are equipped with red-dot finders can, with care, follow the star-hop described in the text by using a low-power, wide-field eyepiece.
Those using a conventional optical finder will have no difficulty finding their way, even under suburban skies.
degrees east of NGC 1807/1817. This
eye-catching asterism turns out to be
a very loose cluster called Collinder 65
(Cr 65). I've dubbed it the Geese.
The honking high-flyers are seemingly
winging their way westward in
a ragged arrow formation outlined by
5th- and 6th-magnitude stars scattered
across four degrees of sky. The flock is
led by seven Flamsteed stars labelled 110,
111, 113, 115, 116, 119, and 120 Tauri.
Trailing them are three more Flamsteeds:
117, 122, and 126 Tauri. Between
117 and 122 Tauri is HD 36408, a
6.1-magnitude star that, like HD 33554
mentioned earlier, isn't blessed with a
Flamsteed number. Numerous dimmer
stars fill out the field.
56 JANUARY 2025 * SKY & TELESCOPE
The Geese are freighted with double
stars. Near the front of the Flamsteed
flock is 5.1-magnitude 111 Tauri, which
sports an 8.8-magnitude companion
106.7″ westward. This wide pairing
is called S 478. HD 36408, the nonFlamsteed
star noted above, is Σ730
- a superb binary featuring 6.1- and
6.4-magnitude stars 9.7″ apart. Just over
½° west-southwest of 4.3-magnitude
119 Tauri (the brightest " bird " here) is a
double named H 3275, which comprises
7.7- and 8.2-magnitude components
separated by 56.1″. About 40′ south of
6th-magnitude 110 Tauri is Σ697, which
consists of 7.3- and 8.1-magnitude stars
25.4″ apart. My 8-inch resolved all of
these dim doubles at 41×.
Some of the Geese exhibit appealingly
warm hues. For example, 119 Tauri is a
stoplight-red variable star listed as CE
Tauri. Nearly ¼° west of CE is 8.7-magnitude
DV Tauri, which yields a golden
glow. Approximately 1
/3° south-southwest
of CE is 6.8-magnitude HD 36320,
another distinctly red star. Less than 3′
east-southeast of HD 36320 is 9.2-magnitude
HD 244538, whose redness is
real but didn't become strongly evident
to my eye until I applied high power.
Delightfully obvious at any magnification
was the beautifully deep orange
sheen of 5.8-magnitude 117 Tauri.
Done with the Geese, I returned
to NGC 1807 and charged northward
73/4°, following a string of four 5th117
115
113
111
S 478
110
Σ697
1817
α
1807
Aldebaran
σ2
σ1
H 3275
104
Σ670
97
AG 311
TAURUS
M1
Crab Nebula
114
105
ι
109
Jupiter
2
1
3
4
5
6
7
8
9
10
IC 2087
Star magnitudes

Sky & Telescope - January 2025

Table of Contents for the Digital Edition of Sky & Telescope - January 2025

Contents
Sky & Telescope - January 2025 - Cover1
Sky & Telescope - January 2025 - Cover2
Sky & Telescope - January 2025 - 1
Sky & Telescope - January 2025 - Contents
Sky & Telescope - January 2025 - 3
Sky & Telescope - January 2025 - 4
Sky & Telescope - January 2025 - 5
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Sky & Telescope - January 2025 - 84
Sky & Telescope - January 2025 - Cover3
Sky & Telescope - January 2025 - Cover4
Sky & Telescope - January 2025 - SGA1
Sky & Telescope - January 2025 - SGA2
Sky & Telescope - January 2025 - SGA3
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Sky & Telescope - January 2025 - SGA9
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