Sky & Telescope - September 2016 - 33

Stars for Finding Your Personal Dawes Limit
In order of separation for 2016.0

Star

2018.0
Sep.
PA

Mag1

Mag2

-6° 55′
-20° 35′
-24° 05′
-4° 50′
+25° 15′
+31° 20′
+27° 47′
+1° 58′
-1° 04′
-40° 35′
+0° 04′
+1° 51′
-24° 46′
+24° 28′
+23° 36′
-38° 28′
+6° 32′
+5° 14′
+24° 56′
+40° 35′
+79° 43′
+38° 11′
-35° 40′
-23° 09′
+23° 38′
+26° 55′
+6° 27′
-27° 59′
-16° 45′
+30° 35′
+16° 59′
+11° 49′
+37° 18′
-43° 25′

0.4
0.3
0.3
0.2
0.0
0.4
0.4
0.2
0.1
0.1
0.3
0.0
0.4
0.3
0.3
0.4
0.3
0.4
0.4
0.1
0.2
0.4
0.1
0.1
0.4
0.0
0.0
0.1
0.1
0.3
0.2
0.4
0.2
0.0

6.6
6.2
6.8
6.4
6.2
5.7
6.4
6.8
6.1
6.1
6.6
6.8
6.2
6.6
6.3
6.6
6.3
6.6
5.8
6.7
6.7
6.7
6.3
6.2
6.1
6.5
6.0
6.1
6.3
6.1
6.9
6.3
6.8
5.7

7.0
6.5
7.1
6.6
6.2
6.1
6.8
7.0
6.2
6.2
6.9
6.8
6.6
6.9
6.6
7.0
6.6
7.0
6.2
6.8
6.9
7.1
6.4
6.3
6.5
6.5
6.0
6.2
6.4
6.4
7.1
6.7
7.0
5.7

0.35″
0.39″
0.44″
0.47″
0.50″
0.57″
0.67″
0.69″
0.69″
0.70″
0.70″
0.73″
0.75″
0.75″
0.75″
0.80″
0.80″
0.84″
0.85″
0.87″
0.91″
1.0″
1.0″
1.0″
1.1″
1.2″
1.2″
1.3″
1.3″
1.5″
1.5″
1.5″
1.6″
1.7″

211°°
131°
157°
30°
258°
105°
150°
241°
144°
99°
279°
71°
113°
351°
4°
23°
204°
177°
127°
4°
15°
315°
315°
300°
330°
320°
222°
258°
65°
312°
146°
105°
221°
359°

0.28″
208°
0.31″
130°
0.43″
159°
0.48″
28°
0.51″
258°
0.58″
106°
0.65″
151°
0.70″
241°
0.52″
138°
(no change)
(no change)
0.69″
73°
0.60″
119°
0.76″
351°
0.75″
4°
(no change)
(no change)
0.83″
178°
0.85″
127°
0.87″
4°
0.92″
15°
1.0″
318°
1.0″
316°
(no change)
1.1″
332°
1.2″
319°
(no change)
1.3″
258°
1.3″
73°
(no change)
1.5″
145°
(no change)
(no change)
1.7″
359°

+35° 22′
-40° 32′
+05° 30′
+33° 43′
+54° 28′
+0° 52′
+48° 43′
-0° 52′
-18° 50′
-7° 58′
+52° 45′
+27° 43′
+55° 42′
+26° 56′
-13° 01′

0.1
0.3
0.4
0.2
0.0
0.2
0.4
0.1
0.4
0.2
0.1
0.0
0.0
0.0
0.0

6.6
6.9
6.3
6.5
5.7
6.9
6.3
6.9
6.8
6.7
6.9
6.3
6.3
6.2
5.9

6.7
7.2
6.7
6.7
5.7
7.1
6.7
7.0
7.2
6.9
7.0
6.3
6.3
6.2
5.9

1.9″
2.3″
2.4″
2.4″
2.5″
2.5″
2.6″
3.1″
4.0″
4.1″
4.2″
4.5″
4.6″
5.1″
5.2″

50°
40°
122°
340°
2°
205°
46°
158°
35°
4°
148°
115°
77°
218°
314°

(no change)
(no change)
(no change)
2.4″
341°
2.6″
0°
(no change)
(no change)
3.1″
158°
(no change)
(no change)
(no change)
(no change)
(no change)
(no change)
(no change)

RA (2000.0) Dec.

BU 1163
BU 341
BU 311
51 Aquarii
52 Arietis
72 Pegasi
STF 1555
STT 517
STF 2173
I 78
STF 2244
STF 186
BU 395
7 Tauri
STT 359
Lambda Scl
31 Tauri
STF 1126
16 Vul
STT 410
STF 2
STF 1338
HWE 28
24 Ophiuchi
36 And
STF 749
52 Orionis
Kappa1 Scl
53 Aquarii
57 Cancri
STT 358
Pi Aquilae
STF 644
HJ 5014

Cet
Vir
Eri
Aqr
Ari
Peg
Leo
Ori
Oph
Cen
Oph
Cet
Cet
Tau
Her
Scl
Tau
CMi
Vul
Cyg
Cep
Lyn
Cen
Oph
And
Tau
Ori
Scl
Aqr
Cnc
Her
Aql
Aur
Cra

1h

13h 03.8m
04h 26.9m
22h 24.1m
3h 05.4m
23h 34.0m
11h 36.3m
5h 13.5m
17h 30.4m
11h 33.6m
17h 57.7m
1h 55.9m
0 h 37.3m
3h 34.4m
18h 35.5m
0h 42.7m
3h 52.0m
7h 40.1m
20h 02.0m
20h 39.6m
0h 09.3m
9h 21.0m
13h 53.5m
16h 56.8m
0h 55.0m
5h 37.1m
5h 48.0m
0h 09.4m
22h 26.6m
8h 54.2m
18h 35.9m
19h 48.7m
5h 10.3m
18h 06.8m

STF 1333
HJ 3527
STF 2375
STF 3050
Mu Draconis
STF 2644
39 Boötis
WNC 2
54 Virginis
17 Hydrae
STF 1009
65 Piscium
STF 958
Phi2 Cancri
STF 1669

Lyn
Eri
Ser
And
Dra
Aql
Boo
Ori
Vir
Hya
Lyn
Psc
Lyn
Cnc
Crv

9h 18.4m
2h 43.3m
18h 45.5m
23h 59.5m
17h 05.3m
20h 12.6m
14h 49.7m
5h 23.9m
13h 13.4m
8h 55.5m
7h 05.7m
0 h 49.9m
6h 48.2m
8h 26.8m
12h 41.3m

24.3m

2016.0
Sep.
PA

ΔMag

Con

Notes

Has 3 distant 10th-mag stars.
Component C: mag 10, 4.7″

HDO 182
12´ east of Procyon
A mag. 5.9 star is 9´ SW.
Component C: mag 8.7, 69″

Component E: mag 8.6, 67″
BU 1117
STF 73
STF 795
BU 391
SHJ 345
Component C: mag 9.2, 55″
STF 2583

Stars are close 0.1″ pairs.
STF 2130
STF 1890

STF 1295
STF 61
Component C: mag 7.9, 96″
STF 1223
Two mag 10 stars are at 60″.

Stars are listed in order of their separation for 2016.0 (0h UT January 1, 2016). Interpolate for your date if the change by 2018.0 is signiﬁcant. Position angle (PA) tells the direction of the fainter star from the
brighter one, counting clockwise from north (0°) through east (90°), south (180°), and west (270°). Data are from the Washington Double Star Catalog (WDS) or, when a pair has a calculated orbit, the Sixth
Catalog of [binary star] Orbits. Both are maintained by the U.S. Naval Observatory and are available at usno.navy.mil. In double-star names, BU = S. W. Burnham, HJ = John Herschel, HWE = H. A. Howe,
I = R. T. A. Innes, STF = F. G. Wilhelm Struve (∑), STT = Otto Struve (O∑), WNC = A. Winnecke.

Sk yandTelescope.com September 2016

33
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Sky & Telescope - September 2016

Table of Contents for the Digital Edition of Sky & Telescope - September 2016
