Sky & Telescope - January 2022 - 45

Evenings with the Stars by Fred Schaaf
Pleiades
The Noble
Hyades
κ
The nearest open cluster is
a naked-eye delight.
L
ast month I called the Pleiades
the loveliest of all naked-eye star
clusters. But a friend of mine asked,
" What about the Hyades? " I thought
about my lifelong love of that collection
of stars and quickly came to this
personal judgement: The Pleiades are
the loveliest naked-eye star cluster, but
the Hyades are the noblest.
The most prominent members of the
Hyades outline the face of Taurus, the
celestial Bull. Depending on the time
of night (and your latitude) these stars
appear as a glittering V or arrowhead.
The southeastern arm of the V would
be shorter without the presence of
magnitude +0.9 Aldebaran, but the star
isn't actually a member of the Hyades.
In fact, at a distance of 65 light-years,
Aldebaran is considerably closer than
the cluster, which is roughly 150 lightyears
away. Nonetheless, the Hyades is
the nearest true star cluster and three
times closer than the Pleiades.
The Hyades also appears bigger and
brighter than the Pleiades. This can
be considered as both a good and a
bad thing. Why bad? The stars of the
Pleiades are close enough to Earth to
appear reasonably bright, yet far enough
away to crowd together in a marvelously
compact grouping. The key stars of
the Pleiades can fit into the low-power
field of a small, wide-field telescope. By
contrast, you need binoculars capable
of showing a 5½° field to contain the
expansive Hyades.
But when it comes to naked-eye
observing, the number of stars easily
visible in the Hyades is much greater
than in the Pleiades. The five brightest
Hyads shine between magnitudes
3.4 and 3.8, and another 11 cluster
pTAURUS TWOSOME Riding high on January evenings is the constellation Taurus, the Bull,
which features two superb open clusters: the Pleiades and the Hyades. Of the two, the Hyades is
arguably the more " noble " naked-eye sight.
members are brighter than magnitude
5.0. That's 16 stars that you should be
able to see without optical aid even
from a small city or a moderately lightpolluted
suburb. A total of 26 Hyades
stars are brighter than magnitude 6.5,
the traditional naked-eye limit for
really dark skies. More than 130 Hyads
are brighter than 9th magnitude and
hence within reach of binoculars under
clear, dark skies.
Not all the stars of the Hyades
are crowded inside the V pattern. The
brightest Hyad farthest from the main
flock is Kappa1 (κ1) Tauri, a 4.2-magnitude
star lying north of the ecliptic
and the V. A scant 5.6′ from Kappa1 is
5.3-magnitude Kappa2, also known
as 67 Tauri. The Kappa pair are one of
several naked-eye doubles in the cluster.
The brightest duo includes the yellow,
3.8-magnitude star Theta1 (θ1) Tauri,
which shines 5.6′ from the orange,
3.4-magnitude Theta2. This pair is the
next stop down from Aldebaran in
the southeastern arm of the V. In the
other branch of the V, the Delta1 (δ1)
and Delta2 pair are much farther apart
(18′) and shine at magnitude 3.8 and
4.8, respectively. About 1° southeast of
Aldebaran you'll find Sigma (σ) Tauri,
comprised of blue-white stars of magnitudes
4.7 and 5.1, separated by a little
more than 7′. How many of these pairs
can you split without optics?
When I view the cluster, my eye
is drawn to an extra line of Hyads
extending south-southwest of the V,
transforming it into a Z or N. I was
gratified to see Stephen James O'Meara
also mentioned this configuration in his
book The Caldwell Objects (the Hyades
cluster is listed as Caldwell 41).
The middle-aged Hyades are much
older than the young, blue Pleiades
- indeed, many Hyads have already
evolved into red (and orange) giants.
In about 50 million years the receding
Hyades will be a ½°-wide telescopic
cluster positioned a few degrees east of
where Betelgeuse is now.
¢ FRED SCHAAF was delighted that
asteroid 7065 Fredschaaf was passing
through the Hyades just a few months
after it was named for him.
sk yand tele scope .o r g * JANUARY 2022 45
Aldebaran
σ
Hyades
δ2
θ
δ1
AKIRA FUJII
https://skyandtelescope.org/

Sky & Telescope - January 2022

Table of Contents for the Digital Edition of Sky & Telescope - January 2022

Contents
Sky & Telescope - January 2022 - Cover1
Sky & Telescope - January 2022 - Cover2
Sky & Telescope - January 2022 - 1
Sky & Telescope - January 2022 - Contents
Sky & Telescope - January 2022 - 3
Sky & Telescope - January 2022 - 4
Sky & Telescope - January 2022 - 5
Sky & Telescope - January 2022 - 6
Sky & Telescope - January 2022 - 7
Sky & Telescope - January 2022 - 8
Sky & Telescope - January 2022 - 9
Sky & Telescope - January 2022 - 10
Sky & Telescope - January 2022 - 11
Sky & Telescope - January 2022 - 12
Sky & Telescope - January 2022 - 13
Sky & Telescope - January 2022 - 14
Sky & Telescope - January 2022 - 15
Sky & Telescope - January 2022 - 16
Sky & Telescope - January 2022 - 17
Sky & Telescope - January 2022 - 18
Sky & Telescope - January 2022 - 19
Sky & Telescope - January 2022 - 20
Sky & Telescope - January 2022 - 21
Sky & Telescope - January 2022 - 22
Sky & Telescope - January 2022 - 23
Sky & Telescope - January 2022 - 24
Sky & Telescope - January 2022 - 25
Sky & Telescope - January 2022 - 26
Sky & Telescope - January 2022 - 27
Sky & Telescope - January 2022 - 28
Sky & Telescope - January 2022 - 29
Sky & Telescope - January 2022 - 30
Sky & Telescope - January 2022 - 31
Sky & Telescope - January 2022 - 32
Sky & Telescope - January 2022 - 33
Sky & Telescope - January 2022 - 34
Sky & Telescope - January 2022 - 35
Sky & Telescope - January 2022 - 36
Sky & Telescope - January 2022 - 37
Sky & Telescope - January 2022 - 38
Sky & Telescope - January 2022 - 39
Sky & Telescope - January 2022 - 40
Sky & Telescope - January 2022 - 41
Sky & Telescope - January 2022 - 42
Sky & Telescope - January 2022 - 43
Sky & Telescope - January 2022 - 44
Sky & Telescope - January 2022 - 45
Sky & Telescope - January 2022 - 46
Sky & Telescope - January 2022 - 47
Sky & Telescope - January 2022 - 48
Sky & Telescope - January 2022 - 49
Sky & Telescope - January 2022 - 50
Sky & Telescope - January 2022 - 51
Sky & Telescope - January 2022 - 52
Sky & Telescope - January 2022 - 53
Sky & Telescope - January 2022 - 54
Sky & Telescope - January 2022 - 55
Sky & Telescope - January 2022 - 56
Sky & Telescope - January 2022 - 57
Sky & Telescope - January 2022 - 58
Sky & Telescope - January 2022 - 59
Sky & Telescope - January 2022 - 60
Sky & Telescope - January 2022 - 61
Sky & Telescope - January 2022 - 62
Sky & Telescope - January 2022 - 63
Sky & Telescope - January 2022 - 64
Sky & Telescope - January 2022 - 65
Sky & Telescope - January 2022 - 66
Sky & Telescope - January 2022 - 67
Sky & Telescope - January 2022 - 68
Sky & Telescope - January 2022 - 69
Sky & Telescope - January 2022 - 70
Sky & Telescope - January 2022 - 71
Sky & Telescope - January 2022 - 72
Sky & Telescope - January 2022 - 73
Sky & Telescope - January 2022 - 74
Sky & Telescope - January 2022 - 75
Sky & Telescope - January 2022 - 76
Sky & Telescope - January 2022 - 77
Sky & Telescope - January 2022 - 78
Sky & Telescope - January 2022 - 79
Sky & Telescope - January 2022 - 80
Sky & Telescope - January 2022 - 81
Sky & Telescope - January 2022 - 82
Sky & Telescope - January 2022 - 83
Sky & Telescope - January 2022 - 84
Sky & Telescope - January 2022 - Cover3
Sky & Telescope - January 2022 - Cover4
Sky & Telescope - January 2022 - SA1
Sky & Telescope - January 2022 - SA2
Sky & Telescope - January 2022 - SA3
Sky & Telescope - January 2022 - SA4
Sky & Telescope - January 2022 - SA5
Sky & Telescope - January 2022 - SA6
Sky & Telescope - January 2022 - SA7
Sky & Telescope - January 2022 - SA8
Sky & Telescope - January 2022 - SA9
https://www.nxtbook.com/nxtbooks/aas/st_202207
https://www.nxtbook.com/nxtbooks/aas/st_202206
https://www.nxtbook.com/nxtbooks/aas/st_202205
https://www.nxtbook.com/nxtbooks/aas/st_202204
https://www.nxtbook.com/nxtbooks/aas/st_202203
https://www.nxtbook.com/nxtbooks/aas/st_202202
https://www.nxtbook.com/nxtbooks/aas/st_202201
https://www.nxtbook.com/nxtbooks/aas/st_202112
https://www.nxtbook.com/nxtbooks/aas/st_202111
https://www.nxtbook.com/nxtbooks/aas/st_202110
https://www.nxtbook.com/nxtbooks/aas/st_202109
https://www.nxtbook.com/nxtbooks/aas/st_202108
https://www.nxtbook.com/nxtbooks/aas/st_202107
https://www.nxtbook.com/nxtbooks/aas/st_202106
https://www.nxtbook.com/nxtbooks/aas/st_202105
https://www.nxtbook.com/nxtbooks/aas/st_202104
https://www.nxtbook.com/nxtbooks/aas/st_202103
https://www.nxtbook.com/nxtbooks/aas/st_202102
https://www.nxtbook.com/nxtbooks/aas/st_202101
https://www.nxtbook.com/nxtbooks/aas/skywatch_2021
https://www.nxtbook.com/nxtbooks/aas/st_202012
https://www.nxtbook.com/nxtbooks/aas/st_202011
https://www.nxtbook.com/nxtbooks/aas/st_202010
https://www.nxtbook.com/nxtbooks/aas/st_202009
https://www.nxtbook.com/nxtbooks/aas/st_202008
https://www.nxtbook.com/nxtbooks/aas/st_202007
https://www.nxtbook.com/nxtbooks/aas/st_202006
https://www.nxtbook.com/nxtbooks/aas/st_202005
https://www.nxtbook.com/nxtbooks/aas/st_202004
https://www.nxtbook.com/nxtbooks/aas/st_202003
https://www.nxtbook.com/nxtbooks/aas/st_202002
https://www.nxtbook.com/nxtbooks/aas/st_202001
https://www.nxtbook.com/nxtbooks/aas/st_201912
https://www.nxtbook.com/nxtbooks/aas/st_201911
https://www.nxtbook.com/nxtbooks/aas/st_201910
https://www.nxtbook.com/nxtbooks/aas/st_201909
https://www.nxtbook.com/nxtbooks/aas/st_201908
https://www.nxtbook.com/nxtbooks/aas/st_201907
https://www.nxtbook.com/nxtbooks/aas/st_201906
https://www.nxtbook.com/nxtbooks/aas/st_201905
https://www.nxtbook.com/nxtbooks/aas/st_201904
https://www.nxtbook.com/nxtbooks/aas/st_201903
https://www.nxtbook.com/nxtbooks/aas/st_201902
https://www.nxtbook.com/nxtbooks/aas/st_201901
https://www.nxtbook.com/nxtbooks/aas/st_201812
https://www.nxtbook.com/nxtbooks/aas/st_201811
https://www.nxtbook.com/nxtbooks/aas/st_201810
https://www.nxtbook.com/nxtbooks/aas/st_201809
https://www.nxtbook.com/nxtbooks/aas/st_201808
https://www.nxtbook.com/nxtbooks/aas/st_201807
https://www.nxtbook.com/nxtbooks/aas/st_201806
https://www.nxtbook.com/nxtbooks/aas/st_201805
https://www.nxtbook.com/nxtbooks/aas/st_201804
https://www.nxtbook.com/nxtbooks/aas/st_201803
https://www.nxtbook.com/nxtbooks/aas/st_201802
https://www.nxtbook.com/nxtbooks/aas/st_201801
https://www.nxtbook.com/nxtbooks/aas/st_201712
https://www.nxtbook.com/nxtbooks/aas/st_201711
https://www.nxtbook.com/nxtbooks/aas/st_201710
https://www.nxtbook.com/nxtbooks/aas/st_201709
https://www.nxtbook.com/nxtbooks/aas/st_201708
https://www.nxtbook.com/nxtbooks/aas/st_201707
https://www.nxtbook.com/nxtbooks/aas/st_201706
https://www.nxtbook.com/nxtbooks/aas/st_201705
https://www.nxtbook.com/nxtbooks/aas/st_201704
https://www.nxtbook.com/nxtbooks/aas/st_201703
https://www.nxtbook.com/nxtbooks/aas/st_201702
https://www.nxtbook.com/nxtbooks/aas/st_201701
https://www.nxtbook.com/nxtbooks/aas/st_201612
https://www.nxtbook.com/nxtbooks/aas/st_201611
https://www.nxtbook.com/nxtbooks/aas/st_201610
https://www.nxtbook.com/nxtbooks/aas/st_201609
https://www.nxtbook.com/nxtbooks/aas/st_201608
https://www.nxtbook.com/nxtbooks/aas/st_201607
https://www.nxtbook.com/nxtbooks/aas/st_201606
https://www.nxtbook.com/nxtbooks/aas/st_201605
https://www.nxtbook.com/nxtbooks/aas/st_201604
https://www.nxtbook.com/nxtbooks/aas/st_201603
https://www.nxtbook.com/nxtbooks/aas/st_201602
https://www.nxtbook.com/nxtbooks/aas/st_201601
https://www.nxtbook.com/nxtbooks/aas/st_201512
https://www.nxtbook.com/nxtbooks/aas/st_201511
https://www.nxtbook.com/nxtbooks/aas/st_201510
https://www.nxtbook.com/nxtbooks/aas/st_201509
https://www.nxtbook.com/nxtbooks/aas/st_201508
https://www.nxtbook.com/nxtbooks/aas/st_201507
https://www.nxtbook.com/nxtbooks/aas/st_201506
https://www.nxtbook.com/nxtbooks/aas/st_201505
https://www.nxtbook.com/nxtbooks/aas/st_201504
https://www.nxtbook.com/nxtbooks/aas/st_201503
https://www.nxtbook.com/nxtbooks/aas/st_201502
https://www.nxtbook.com/nxtbooks/aas/st_201501
https://www.nxtbook.com/nxtbooks/aas/st_201412
https://www.nxtbook.com/nxtbooks/aas/st_201411
https://www.nxtbook.com/nxtbooks/aas/st_201410
https://www.nxtbook.com/nxtbooks/aas/st_201409
https://www.nxtbook.com/nxtbooks/aas/st_201408
https://www.nxtbook.com/nxtbooks/aas/st_201407
https://www.nxtbook.com/nxtbooks/aas/st_201406
https://www.nxtbook.com/nxtbooks/aas/st_mars
https://www.nxtbook.com/nxtbooks/aas/st_201405
https://www.nxtbook.com/nxtbooks/aas/st_201404
https://www.nxtbook.com/nxtbooks/aas/st_201403
https://www.nxtbook.com/nxtbooks/aas/st_201402
https://www.nxtbook.com/nxtbooks/aas/st_201401
https://www.nxtbook.com/nxtbooks/aas/st_201312
https://www.nxtbook.com/nxtbooks/aas/st_201311
https://www.nxtbook.com/nxtbooks/aas/st_201310
https://www.nxtbook.com/nxtbooks/aas/st_201309
https://www.nxtbook.com/nxtbooks/aas/st_201308
https://www.nxtbook.com/nxtbooks/aas/st_201307
https://www.nxtbook.com/nxtbooks/aas/st_201306
https://www.nxtbook.com/nxtbooks/aas/st_201305
https://www.nxtbook.com/nxtbooks/aas/st_201304
https://www.nxtbook.com/nxtbooks/aas/st_201303
https://www.nxtbook.com/nxtbooks/aas/st_201302
https://www.nxtbook.com/nxtbooks/aas/st_201301
https://www.nxtbook.com/nxtbooks/aas/st_201212
https://www.nxtbook.com/nxtbooks/aas/st_201211
https://www.nxtbook.com/nxtbooks/aas/st_201210
https://www.nxtbook.com/nxtbooks/aas/st_201209
https://www.nxtbook.com/nxtbooks/aas/st_201208
https://www.nxtbook.com/nxtbooks/aas/st_201207
https://www.nxtbook.com/nxtbooks/aas/st_201206
https://www.nxtbook.com/nxtbooks/aas/st_201205
https://www.nxtbook.com/nxtbooks/aas/st_201204
https://www.nxtbook.com/nxtbooks/aas/st_201203
https://www.nxtbook.com/nxtbooks/aas/st_201202
https://www.nxtbook.com/nxtbooks/aas/st_201201
https://www.nxtbook.com/nxtbooks/aas/st_201112
https://www.nxtbook.com/nxtbooks/aas/st_201111
https://www.nxtbook.com/nxtbooks/aas/st_201110
https://www.nxtbook.com/nxtbooks/aas/st_201109
https://www.nxtbook.com/nxtbooks/aas/st_201108
https://www.nxtbook.com/nxtbooks/aas/st_201107
https://www.nxtbook.com/nxtbooks/aas/st_201106
https://www.nxtbook.com/nxtbooks/aas/st_201105
https://www.nxtbook.com/nxtbooks/aas/st_201104
https://www.nxtbook.com/nxtbooks/aas/st_201103
https://www.nxtbook.com/nxtbooks/aas/st_201102
https://www.nxtbook.com/nxtbooks/aas/st_201101
https://www.nxtbook.com/nxtbooks/aas/st_201012
https://www.nxtbook.com/nxtbooks/aas/st_201011
https://www.nxtbook.com/nxtbooks/aas/st_201010
https://www.nxtbook.com/nxtbooks/aas/st_201009
https://www.nxtbook.com/nxtbooks/aas/st_201008
https://www.nxtbook.com/nxtbooks/aas/st_201007
https://www.nxtbook.com/nxtbooks/aas/st_201006
https://www.nxtbook.com/nxtbooks/aas/st_201005
https://www.nxtbook.com/nxtbooks/aas/st_201004
https://www.nxtbook.com/nxtbooks/aas/st_201003
https://www.nxtbook.com/nxtbooks/aas/st_201002
https://www.nxtbook.com/nxtbooks/aas/st_201001
https://www.nxtbookmedia.com