33 Doubles in Ursa Majoris

In this table you can see all the relevant data about the 33 doubles. Click on the name of a star in order to read the observations. Our time "window" for observing this set of doubles is from 1st March, 2003 to 30th April, 2003  Click here for a Road-Map of this observing project!.
Data given in red font are targets for measuring in this project.

New!: Rafa Barberá has programmed a new DI calculator for knowing in advance the difficulty to split a double star named pLADIC for the Palm computing platform. Just click here to get all the details!
New: If you are a Skymap user, only click here for downloading a file containing all the doubles for this project!

 
Name
Distance*
Mv1*
Mv2*
PA*
RA(J2000)
Dec(J2000)
Struve 1258
10.1"
7.69
7.81
331°
08h 43m 25s
+48° 51' 41"
42812
n/a
Struve 1275
1.8"
8.72
8.97 
197°
08h 51m 26s
+57° 31' 38"
43485
69.83
Struve 1306 (13)
3.9"
4.80
8.73 
355°
09h 10m 23s
+67° 08' 02"
45038
90.50
Struve 1315
24.8"
7.37
7.78 
27°
09h 12m 46s
+61° 40' 33"
45206
n/a
Struve 1318
2.6"
7.54
9.17 
231°
09h 13m 39s
+46° 59' 25"
45274
83.63
Struve 1321
17.3"
7.64
7.70 
92°
09h 14m 23s
+52° 41' 12"
45343
n/a
Struve 1341
20.6"
9.06
9.17
89°
09h 22m 39s
+50° 36' 14"
45983
n/a
Otto Struve 200
1.3"
6.55
8.68 
335°
09h 24m 55s
+51° 34' 26"
46168
92.31
Struve 1346 (21)
5.8"
7.36
8.44
314°
09h 25m 37s
+54° 00' 57"
46239
50.42
Struve 1351 (23)
22.8"
3.65
9.19 
269°
09h 31m 31s
+63° 03' 43"
46733
n/a
Struve 1350
10.3"
8.21
8.26 
69°
09h 34m 19s
+66° 47' 42"
46964
n/a
Struve 1376
5.2"
8.22
8.29
310°
09h 45m 01s
+43° 13' 43"
47834
32.90
Struve 1402
31.8"
7.81
8.85 
106°
10h 04m 56s
+55° 29' 16"
49382
n/a
Struve 1415
16.7"
6.66
7.36
168°
10h 17m 50s
+71° 03' 38"
50433
n/a
Struve 1427
9.2"
7.56
7.89
214°
10h 22m 00s
+43° 54' 19"
50766
15.69
Struve 1428
2.8"
7.39
7.79
88°
10h 25m 59s
+52° 37' 18"
51062
60.76
Struve 1460
3.8"
7.97
8.08
162°
10h 40m 35s
+42° 09' 11"
52253
41.92
Struve 1483
2.4"
8.79
8.81 
62°
10h 54m 30s
+47° 29' 35"
53336
59.48
Struve 1510
5.1"
7.36
8.86 
330°
11h 08m 00s
+52° 49' 18"
54407
58.78
Struve 1512
9.9"
8.56
8.75 
51°
11h 09m 13s
+62° 29' 51"
54514
7.93
Xi (Struve 1523)
1.7"
4.33
4.80 
273°
11h 18m 22s
+31° 30' 38"
-----
72.64
Struve 1543 (57)
(1910)
98.0"
7.90
10.20
184°
11h 28m 35s
+39° 18' 29"
56002
n/a
Struve 1544
12.2"
7.31
8.24 
91°
11h 31m 18s
+59° 42' 03"
56202
n/a
Struve 1553
6.0"
7.16
7.68 
166°
11h 36m 35s
+56° 08' 07"
56622
38.53
Struve 1559
1.8"
6.84
8.10 
322°
11h 38m 49s
+64° 20' 49"
56816
86.96
Struve 1561
9.5"
6.29
8.22 
250°
11h 38m 44s
+45° 06' 30"
56809
 36.18
Struve 1576
5.4"
8.59
9.07 
242°
11h 52m 52s
+30° 49' 38"
1576
38.79
Struve 1600
7.8"
7.09
7.69
93°
12h 05m 34s
+51° 55' 52"
58980
21.47
Struve 1603
22.0"
7.79
8.45 
84°
12h 08m 07s
+55° 27' 50"
59176
n/a
Struve 1695
3.7"
5.84
7.75 
281°
12h 56m 17s
+54° 05' 58"
63143
68.26
Mizar (Struve 1744)
14.4"
2.23
3.85
153°
13h 23m 56s
+54° 55' 18"
65378
n/a
Struve 1770
1.7"
6.95
8.26
123°
13h 37m 43s
+50° 42' 53"
66475
87.86
Struve 1820
2.6"
8.33
8.68
117°
14h 13m 01s
+55° 19' 31"
69442
65.56

Notes:
For understanding DIs and how they are calculated, please read this article!
n/a: Not applicable: Difficulty Indexes are calculated only for those doubles that have separations between 1.0 and 10.0 seconds of arc and shine with a difference of magnitude between 0 and 5. For an explanation about how to interpret and use DIs, click on the DI link in the column header above.



(c) 1998-2003 The Spirit of 33
www.s33.org