Sky and Telescope - September 2017 - 71

Alf
lfa
a Plan
Plan
aneta
eta
tari
riu
ri
um
Mon
Mont
o erre
re
ey,, Mex
exic
e
xic
ico
ico

w ww.obser
www.observa-dome.com
www.ob
serva
va dom
dome.c
e.com
om
As the country's oldest dome
manufacturer, Observa-DOME
has developed unmatched
expertise. No matter what the
use, the climate, the installation, the design, or your location, Observa-DOME meets
the challenge.

p p Corner gussets and slightly angled legs
provide stability. Angle aluminum edging keeps
the lid from sliding off.
p At night the interior LED provides a soft glow
visible from a fair distance, yet is not too bright
when the box is opened.

TON Y M ORRIS (2)

see the seat from quite a distance. But
the light level is so low that no other
astronomer has ever complained when I
have lifted the lid to find some item."
The holes in the lid serve a second,
valuable function: They provide markers
for where to put your feet when standing
on the stool. This is especially useful at
star parties when children need to stand
tall to reach the eyepiece. The holes are
drilled near the outer edge to serve as a
warning of where the footing ends. Tony
says, "My stool is far more stable than a
step ladder, and the dim red light shining
through the holes in the lid lets a child
know exactly where his/her feet are."
Overall, Tony is very happy with his
combination project. He reports just
one glitch: "If I were to build another
astronomy stool I would definitely build
it to the same basic design, but I would
make the box's sides 2 inches longer so
my star atlas would fit inside it!"
For more information, contact Tony
at pandt@vic.chariot.net.au.
¢ Contributing Editor JERRY OLTION is a
fan of not tripping over equipment in the
dark. Reach him at j.oltion@gmail.com.

371 Commerce Park Drive, Jackson, MS 39213
Phone (601) 982-3333 ‡ (800) 647-5364 ‡ Fax (601) 982-3335 ‡ mail@observa-dome.com

Get more of a great thing
A Jumbo version of S&T 's Pocket Sky Atlas
We wanted a clear and detailed atlas,
easy to consult at the telescope.
pe
e.

62

48

Sky

ċĔE\ęLQFKHVSDJHV
 VSLUDOERXQGZLWKVWLIIDQG
 GHZUHVLVWDQWFRYHU

Pocket Sky Atlas - Jumbo Edition
by Roger W. Sinnott

12

RU
7128

& Te
lesco
pe
B164 's Po

B168

54
73

56
59

-3
-3
30
0°°

L I B +4
R A 0°

lesc

58
8

π1

ρ

H YNoD

7086
vdB

145

46

B364

74

V107
0

yA
tlas

C E P vddBB 14400
HE
US

FZ

y At
las -

nt14 h

B362

- Ju
mbo
Edit
t
61
1

69
69
94
4
46
6
B1
14
48
4
8-9
89

6939

Ju
70m
08bo Ed
ition

Le Ge

il 3

CN
N

33

47

N 97
0 IC 13
69
π
7062 51
50
7039 7048 63 59
er52
5ica
RU
2 Ne
60
68
IC 50 (c)
7000bula
76
7044
55

R AAm
rth

1

cket
Sk

21 h

IC
I 13
1 96

cket
Sk

M39
7082
V133
71
9 5694
LD
W
75

77

2

opee's
's Po

7243

15 h

σ

& Te

71

Σ 28
28
84

4
40
0

+50°

Coco
π2
Nebu on
la
IC 51
7209
46

So, starting with our famous Pocket Sky Atlas
tla
tl
a s,
as
ZHPDJQLðHGLWVFKDUWVDQGDGGHGVL[
DGGLWLRQDOFORVHXSðHOGVLQFOXGLQJì6WHDP
P
IURPWKH7HDSRWúDQGì7KH6FRUSLRQâV7DLOú
ú

Sky
22 h

β

V11

51

ω2

W

ω1

ψ

20

Seash
Blin
elllll Ga
Plane king
G lax
M8
U(c)
83
y 26
ta
3
6826 ry
Z
115
ο2
16 θ
IC
5253
σ
70
ο 1 30
3
Pelic5070
CEN
LU P
Sh2- h
R
RT
an
US
T AU
TA
112 O
A U RUIC 505419
Ne
c¹
1Σ 40
cc²
U S 68 9 bula
τ²
6
ν
61
T
7063
B346
North
5161
φ1
2
Coal ern
Piazz
IC
Men
Me
C 42
φ2
6914
esa
cken
6811
nkke
96
i's Fly
V1
V10
nt
n
1
t
00
02
2
ing
y
υ
ESO 68
Star V367
AX(c
PK 80
θ6910 Cr
383-8
667
)
-6.1
RW
419
δ
z
A
AF
Egg
ψ
+30°k
Nebu
IC 13
11
la
υ
γ Sa
M29
- 40
-4
40
vdB
dr
53
53
λ
0°°
36
6
67
δ GG
7
133
Y
IC 13
GG
X
14
Berk
18
ζ
RR
V973
RS(c
T
86
γ
χ
) Cres
57
5
P
78
7
IC
86
86
47
49
Nebucent
6992 η
κ
ε
540
54
408
Base
6995
Sh2- 96
ω
6819
0
6888dla
l6
104 8
β
19
ν
IC 44
IC
444
44
54
5
Ced 22
44
Veil ο
48
4
4
35 68
83
8
φ83
3
17
Nebu
27
25 4
55
55
564
e
53
643
3
30
43
la 56
μ
0
Biur
ε
IIC
OΣ
C4
44
2
g
40
4
52
6871
394512
06
06
λ 32
Sh26960
d PK
τ1
8 15
C YG
58
58
72-17
101
h46
88
469
Th4
8
82
υ1
690
2
90
η
39
τ 2N Uι
ESO .1
ESO
υ2
S
27
274
π31
4-1
44-1
27V4
-1
0-149
41IC
IC 44
7
vdB
6940
440
R
40
μ
02
128
2
4
α
17
ν1
ESSO
ES
O 22
22
21
ν2
1-2
1-26
8
+20°
--2
26
26
Σ 25
ω Ce χ
30
ζ
κ
IC
76
5
54
n
4
46
R
496
60
513
5
51
1 9 (c
0
54
ρ
-5 52
)
η
33
6
66
FI
21
59
59
-50
92
27
27
28
6834
0°°
23
σ
59
946
94
46
V744
VU
44
19
PK
L
RCW
RC
PEC
64+5
W 10
15
Hog
Ho
og
Foot SU
gg
5.1
φ
3
g 18
.1
ζ
18 U b
68 530
LA
prin
307
07
24
6885 8253
t Ne
c
528
DE
bula 9
K
29
M SV86
LPH
=M
RC
Albi
CW
21 h
W1
INU
1-9
58
58
10
reo
82
02
0
92
57
2
22
16
2
2
74
74
2 574
49
9
S
Sh
22
Sh2- 2-90
60
606
17
067
67
T
88
6813 β
58
58
Crr 2
C
82
23
23
29
ε
10
99
9
V7
V71
κ N
9
6905
716
16 Du
ORM
13 Q
mbb
Stock
ell Ne
A
ζ
6800
56
5662
1
62 v
688666
bula
θ
Crr 29
6823
M27
V
6830
92
92
CIR
12 RV
V
RC
CIN
ι1
60
60
64
6820
V3
08
X
PK 32
PK
β Pis
α
87
87
38
R
81 XX
81
322
US
22-2
P sm
V41
V4
X
2
2--2
vdB
smi
41
miiss
12
2.1
2
ι2
2
.1
1
20
20
12
S
26
6
γ
V7
V20
560
56
76
7
606
60
6
06
0h
ESSO
Ru 10
SO 137
α
h4
h
08
08
137
13
4
48
8
81
R
7-3
7
13
-34
-34
-3
56
34
617
61
51
51
513
17
17 TTrr
13
38
38
22
22
δ
LLyn
60
yn
yng
02
0
25
25
ga
g
a2
β
Rigi
Rig
vd
dB
gilill K
BH
B
Crr 2
H 65
60
Keen
16
16 h
27
65a
7
nt
n
5a
V7
2
t
5
53
7
73
Sa 172
Sa
3
316
31
37
37
16
1
J
1
17
6
θ
72
72
V7
V7
76
P xim
Pro
66
66
Tr 21
a
21
Ceeen
C
n
nttau
au
urri
u
ri
5 81
52
15
15 h
59
5
9

(c)

ξ

72

57

7027

58
82
8
24
24

50
5
0

α

Dene

b

Sh2-

Ceed
d 12
122
22

14
4h

m

-02
2 30
230
C
Call toll free: 888-253-0230
oor order online at shopatsky.com

s k y a n d t e l e s c o p e .c o m

* SEPTEMBER 2017

71


http://www.obsessiontelescopes.com http://www.observa-dome.com http://www.shopatsky.com http://www.skyandtelescope.com

Sky and Telescope - September 2017

Table of Contents for the Digital Edition of Sky and Telescope - September 2017

Contents
Sky and Telescope - September 2017 - Cover1
Sky and Telescope - September 2017 - Cover2
Sky and Telescope - September 2017 - 1
Sky and Telescope - September 2017 - Contents
Sky and Telescope - September 2017 - 3
Sky and Telescope - September 2017 - 4
Sky and Telescope - September 2017 - 5
Sky and Telescope - September 2017 - 6
Sky and Telescope - September 2017 - 7
Sky and Telescope - September 2017 - 8
Sky and Telescope - September 2017 - 9
Sky and Telescope - September 2017 - 10
Sky and Telescope - September 2017 - 11
Sky and Telescope - September 2017 - 12
Sky and Telescope - September 2017 - 13
Sky and Telescope - September 2017 - 14
Sky and Telescope - September 2017 - 15
Sky and Telescope - September 2017 - 16
Sky and Telescope - September 2017 - 17
Sky and Telescope - September 2017 - 18
Sky and Telescope - September 2017 - 19
Sky and Telescope - September 2017 - 20
Sky and Telescope - September 2017 - 21
Sky and Telescope - September 2017 - 22
Sky and Telescope - September 2017 - 23
Sky and Telescope - September 2017 - 24
Sky and Telescope - September 2017 - 25
Sky and Telescope - September 2017 - 26
Sky and Telescope - September 2017 - 27
Sky and Telescope - September 2017 - 28
Sky and Telescope - September 2017 - 29
Sky and Telescope - September 2017 - 30
Sky and Telescope - September 2017 - 31
Sky and Telescope - September 2017 - 32
Sky and Telescope - September 2017 - 33
Sky and Telescope - September 2017 - 34
Sky and Telescope - September 2017 - 35
Sky and Telescope - September 2017 - 36
Sky and Telescope - September 2017 - 37
Sky and Telescope - September 2017 - 38
Sky and Telescope - September 2017 - 39
Sky and Telescope - September 2017 - 40
Sky and Telescope - September 2017 - 41
Sky and Telescope - September 2017 - 42
Sky and Telescope - September 2017 - 43
Sky and Telescope - September 2017 - 44
Sky and Telescope - September 2017 - 45
Sky and Telescope - September 2017 - 46
Sky and Telescope - September 2017 - 47
Sky and Telescope - September 2017 - 48
Sky and Telescope - September 2017 - 49
Sky and Telescope - September 2017 - 50
Sky and Telescope - September 2017 - 51
Sky and Telescope - September 2017 - 52
Sky and Telescope - September 2017 - 53
Sky and Telescope - September 2017 - 54
Sky and Telescope - September 2017 - 55
Sky and Telescope - September 2017 - 56
Sky and Telescope - September 2017 - 57
Sky and Telescope - September 2017 - 58
Sky and Telescope - September 2017 - 59
Sky and Telescope - September 2017 - 60
Sky and Telescope - September 2017 - 61
Sky and Telescope - September 2017 - 62
Sky and Telescope - September 2017 - 63
Sky and Telescope - September 2017 - 64
Sky and Telescope - September 2017 - 65
Sky and Telescope - September 2017 - 66
Sky and Telescope - September 2017 - 67
Sky and Telescope - September 2017 - 68
Sky and Telescope - September 2017 - 69
Sky and Telescope - September 2017 - 70
Sky and Telescope - September 2017 - 71
Sky and Telescope - September 2017 - 72
Sky and Telescope - September 2017 - 73
Sky and Telescope - September 2017 - 74
Sky and Telescope - September 2017 - 75
Sky and Telescope - September 2017 - 76
Sky and Telescope - September 2017 - 77
Sky and Telescope - September 2017 - 78
Sky and Telescope - September 2017 - 79
Sky and Telescope - September 2017 - 80
Sky and Telescope - September 2017 - 81
Sky and Telescope - September 2017 - 82
Sky and Telescope - September 2017 - 83
Sky and Telescope - September 2017 - 84
Sky and Telescope - September 2017 - Cover3
Sky and Telescope - September 2017 - Cover4
https://www.nxtbook.com/nxtbooks/aas/st_202406
https://www.nxtbook.com/nxtbooks/aas/st_202405
https://www.nxtbook.com/nxtbooks/aas/st_202404_qr
https://www.nxtbook.com/nxtbooks/aas/st_202404
https://www.nxtbook.com/nxtbooks/aas/st_202403
https://www.nxtbook.com/nxtbooks/aas/st_202402
https://www.nxtbook.com/nxtbooks/aas/st_202401_aus
https://www.nxtbook.com/nxtbooks/aas/st_202401
https://www.nxtbook.com/nxtbooks/aas/st_202312_aus
https://www.nxtbook.com/nxtbooks/aas/st_202312
https://www.nxtbook.com/nxtbooks/aas/st_202311
https://www.nxtbook.com/nxtbooks/aas/st_202310
https://www.nxtbook.com/nxtbooks/aas/st_202309
https://www.nxtbook.com/nxtbooks/aas/st_202308
https://www.nxtbook.com/nxtbooks/aas/st_202307
https://www.nxtbook.com/nxtbooks/aas/st_202306
https://www.nxtbook.com/nxtbooks/aas/st_202305
https://www.nxtbook.com/nxtbooks/aas/st_202304
https://www.nxtbook.com/nxtbooks/aas/st_202304_qr
https://www.nxtbook.com/nxtbooks/aas/st_202303
https://www.nxtbook.com/nxtbooks/aas/st_202302
https://www.nxtbook.com/nxtbooks/aas/st_202301
https://www.nxtbook.com/nxtbooks/aas/st_202212
https://www.nxtbook.com/nxtbooks/aas/st_202211
https://www.nxtbook.com/nxtbooks/aas/st_202210
https://www.nxtbook.com/nxtbooks/aas/st_202209
https://www.nxtbook.com/nxtbooks/aas/st_202208
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