Friday, February 9, 2024

6 february 2024

After more weeks of storms, we had a clear night finally.  Seeing was to be average and transparency poor.  Because of various chores I wasn't free until 9:30pm, and had resigned myself to watching YouTube videos.  But as the computer was turning on, I shamed myself into going outside to observe.  After all, getting a telescope was my way of not wasting my time in the evenings, to be in the world.  So I bundled up and in 10 minutes, after taking the scope's tarp off, I was observing with the 6-inch refractor.  It was dewy, and transparency really was poor, but seeing was ok in the 6-inch and I was even seeing airy disks and nice round diffraction rings with higher powers.  After aligning on Sirius then Dubhe, I proceeded to cover Struves in Ursa Major.  Then a C-shaped cloud, looking a lot like Barnard's Loop, covered that part of the sky, so I swung down to Canis Minor, until the whole sky was cloudy.  So much time has passed between sessions, Gemini is past meridian by the time I started.  I hope there will be a gap in the weather soon so I can go to a dark site.

STF1402 AB: 152; 125x: Wide, 1 Dm, red A.  There is a with a wide third another 1 Dm from B (GIR 2 AC).  -97% PRO, it is not binary.
10h 04m 54.93s +55° 29' 16.5" P.A. 105.00 sep 33.1 mag 7.91,8.92 Sp K5 dist. 520.83 pc (1698.95 l.y.)

STF1425 AB: 152; 150x: Close, faint, unequal white pair, half a delta magnitude, split with 125x but better seen 150x. -4% PRO, 1,395 AU WS, 1.7+1.5 Msol, and RVD 0.6 < EV 2.0.  It might be binary, an orbit should be tried.
10h 21m 34.14s +46° 09' 07.6" P.A. 358.00 sep 4.8 mag 9.89,10.74 Sp F5 dist. 144.51 pc (471.39 l.y.)

STF1427 AB: 152; 125x: Easy near equal, well separated.  PRO 0%, 1,322 AU WS, 1.8+1.6 Msol, RVD 0.4 < EV 2.1, so it might be binary and an orbit should be tried.
10h 22m 00.53s +43° 54' 19.3" P.A. 214.00 sep 9.3 mag 8.18,8.54 Sp F5V dist. 105.04 pc (342.64 l.y.)

STF1428 AB: 152; 150x: Close but not difficult unequal stars, best seen 150-200x.  86% PRO, 226 AU WS, 1.3+1.4 Msol, it is likely binary and an orbit should be tried.
10h 25m 59.00s +52° 37' 18.3" P.A. 88.00 sep 2.8 mag 8.02,8.44 Sp F6V dist. 87.11 pc (284.15 l.y.)

STF1430 AB: 152; 125x: Very faint and wide B seen with averted vision only.  -24% PRO, it is not binary.
10h 25m 41.11s +40° 54' 39.4" P.A. 272.00 sep 21.2 mag 8.20,12.10 Sp G5III dist. 510.2 pc (1664.27 l.y.)

STF1436 AB: 152; 125x: Faint wide B needs averted vision to see, then can hold direct.  81% PRO, 1,300 AU WS, 1.5+1.0, and RVD 1.5 < EV 1.8, it is likely binary and needs an orbit.
10h 30m 22.86s +56° 21' 20.0" P.A. 254.00 sep 10.5 mag 8.78,10.39 Sp F5 dist. 118.48 pc (386.48 l.y.)

STF1460 AB: 152; 125x: Fairly close, but still easy with low power, white, unequal stars.  -14% PRO, 489 AU WS, 1.5+1.5 Msol, it is not likely binary.
10h 40m 35.04s +42° 09' 11.6" P.A. 161.00 sep 3.9 mag 8.72,8.90 Sp F2 dist. 185.87 pc (606.31 l.y.)

STF1461 AB: 152; 125x: Well separated >1 Dm, with STF1463 double in field.  -10% PRO, it is not likley binary.
10h 41m 59.31s +46° 38' 59.7" P.A. 137.00 sep 9.1 mag 8.61,10.31 Sp A5V dist. 423.73 pc (1382.21 l.y.)

STF1463 AB: 152; 125x: 1 Dm, well separated.  In the same field as STF1461 and looks similar to it, a little more closely separated.  These two form an equal triangle with a star of similar magnitude, but which is not itself double. -85 PRO, it is not binary.
10h 42m 54.25s +46° 41' 25.2" P.A. 258.00 sep 7.9 mag 9.30,10.42 Sp G5

STF1462 AB: 152; 125x: B is faint but easily seen with low power, well separated, white.  6% PRO, 904 AU WS, 1.9+1.0 Msol, RVD 2.5 > EV 2.4.  Hard to say it's binary and not just comoving, an orbit should be tried.
10h 42m 52.23s +50° 47' 57.3" P.A. 174.00 sep 8.1 mag 7.41,10.10 Sp A8IV dist. 129.2 pc (421.45 l.y.)

STF1465 AB: 152; 150x: Close near equal light orange stars, can split at 125x but better seen 150x.  23% PRO, 1,884 AU WS, 3.4+3.1 Msol, it is possibly binary and needs an orbit.
10h 43m 13.35s +44° 37' 41.6" P.A. 11.00 sep 2.2 mag 9.79,10.10 Sp K2

STF1467 AB: 152; 125x: Close pair, significant delta magnitude, white.  25% PRO, 1,425 AU WS, 2.8+1.5 Msol, it's possibly binary and needs an orbit.
10h 45m 15.60s +44° 58' 11.2" P.A. 288.00 sep 3.9 mag 8.58,10.76 Sp K0III dist. 239.23 pc (780.37 l.y.)

STF1475 AB: 152; 125x: Very wide, faint B seen with averted vision only.  -93% PRO, it is not binary.
10h 49m 25.90s +41° 23' 24.2" P.A. 186.00 sep 26.6 mag 7.89,11.30 Sp G0 dist. 96.34 pc (314.26 l.y.)

STF1483 AB: 152; 150x: Faint near equal light orange stars.  -31% PRO it is not binary. 
10h 54m 30.84s +47° 29' 35.8" P.A. 243.00 sep 2.3 mag 9.52,9.61 Sp G5 dist. 52.85 pc (172.4 l.y.)

STF1484 AB: 152; 125x: Wide B seen with averted vision.  -93% PRO, it is not binary.  BC is not binary either, -41% PRO.
10h 54m 36.71s +45° 27' 57.3" P.A. 4.00 sep 18.3 mag 10.10,12.60 Sp K0

STF1485 AB: 152; 125x: Wide, faint, needs averted vision. -80% PRO, it is not binary.
10h 54m 37.97s +43° 34' 58.9" P.A. 218.00 sep 18.6 mag 8.74,11.50 Sp K0 dist. 531.91 pc (1735.09 l.y.)

STF1486 AB: 152; 125x: Wide near equal stars.  -81% PRO, it is not binary.
10h 55m 01.14s +52° 07' 18.2" P.A. 100.00 sep 31.6 mag 8.45,9.69 Sp K5 dist. 420.17 pc (1370.59 l.y.)

STF1488 AB: 152; 125x: Wide, faint B, need averted vision to see better.  -30% PRO, it is not binary.
10h 56m 47.77s +52° 11' 00.9" P.A. 214.00 sep 20.0 mag 8.17,11.20 Sp A3 dist. 109.29 pc (356.5 l.y.)

STF1494 AB: 152; 125x: Wide pair, B is faint seen with averted vision then can hold direct.  1% PRO, 520 AU WS, 0.9+0.6 Msol, RVD 1.3 < EV 2.3, it is possibly binary and an orbit should be tried.
10h 58m 25.63s +37° 01' 43.8" P.A. 331.00 sep 10.7 mag 8.85,10.62 Sp G5 dist. 53.73 pc (175.27 l.y.)

STF1525 AB: 152; 150x: Excellent near equal pair, faint, medium power is best since high power blurs the image.  Good close split, with seeing.  65% PRO, 521 AU WS, 1.6+1.5 Msol, RVD 0.1 < EV 3.2, it is probably binary and needs an orbit.
11h 19m 29.37s +47° 28' 12.6" P.A. 173.00 sep 2.3 mag 9.90,9.93 Sp F5 dist. 325.73 pc (1062.53 l.y.)

STF1579 AB-C: 152; 125x: 2 Dm close companion, still split with low power.  -54% PRO, it is not binary (nor is AB-D, only AB is binary).
11h 55m 05.74s +46° 28' 36.6" P.A. 44.00 sep 3.7 mag 6.68,8.32 Sp A3Vn dist. 211.86 pc (691.09 l.y.)

STF1541 AB: 152; 125x: Faint B 2 Dm, well split.  -14% PRO, it si not binary.
11h 27m 39.46s +46° 17' 33.4" P.A. 27.00 sep 7.8 mag 7.97,10.13 Sp F8 dist. 89.29 pc (291.26 l.y.)

STF1542 AB: 152; 150x: Very pretty white and 2 Dm B, close but comfortably split with both 125x and 150x.  -9% PRO, it is not binary.
11h 27m 56.02s +44° 33' 57.0" P.A. 267.00 sep 3.9 mag 6.93,9.65 Sp F2V dist. 88.89 pc (289.96 l.y.)

STF1586 AB: 152; 200x: Excellent!  Split with seeing, a very good close split nearly 2 Dm, faint.  82% PRO, 285 AU WS, 1.8+1.2 Msol, it is very likely binary and an orbit should be tried.
11h 56m 53.86s +40° 21' 21.5" P.A. 255.00 sep 1.5 mag 8.83,10.37 Sp F8 dist. 147.49 pc (481.11 l.y.)

STF1515 AB: 152; 125x: = HJ  494, near equal, wide.  Parallax data missing for the companion.
11h 13m 03.64s +40° 11' 03.9" P.A. 140.00 sep 31.2 mag 10.70,10.85 Sp F8+G0

STF1543 AB: 152; 125x: Yellow-white, 2 Dm, well split.  12% PRO, 362 AU WS, 2.3+1.1 Msol, it could be binary and an orbit should be tried.
11h 29m 04.12s +39° 20' 13.1" P.A. 354.00 sep 5.5 mag 5.35,10.67 Sp A2V dist. 65.23 pc (212.78 l.y.)

STF1569 AB: 152; 150x: Excellent, faint unequal pair, dark yellow.  Close split at 125x & 150x. -7% PRO, it is not binary.  
11h 44m 18.43s +39° 00' 24.5" P.A. 321.00 sep 3.7 mag 8.83,10.59 Sp F0 dist. 307.69 pc (1003.68 l.y.)

STF1533 A-BC: 152; 125x: Easy wide pair, near equal.  -81% PRO, it is not binary.  
11h 22m 07.07s +37° 05' 15.1" P.A. 173.00 sep 23.1 mag 9.25,9.43 Sp G0 dist. 374.53 pc (1221.72 l.y.)

STF1524 AB: 152; 125x: Very unequal, well split. Alula Borealis.  87% PRO, 926 AU WS, 5.4+1.3 Msol, it is likely binary and needs an orbit tried.
11h 18m 28.74s +33° 05' 39.5" P.A. 147.00 sep 7.0 mag 3.64,10.10 Sp K3IIIBaO dist. 122.4 pc (399.27 l.y.)

STF1182 AB: 152; 125x: Unequal, well split.  60% PRO, 1,336 AU WS, 2.9+2.2 Msol, it is likely binary and needs an orbit.
08h 05m 24.43s +05° 49' 38.9" P.A. 75.00 sep 4.9 mag 7.48,8.76 Sp B9 dist. 328.95 pc (1073.03 l.y.)

STF1185 AB: 152; 125x: Faint, slightly unequal, close split.  24% PRO, 348 AU WS, 1.1+0.9 Msol, RVD 0.5 < EV 3.2, it is probably binary and needs an orbit.
08h 07m 07.38s +01° 20' 46.5" P.A. 94.00 sep 3.8 mag 9.59,10.26 Sp K0

STF1198 AB: 152; 125x: Near equal, wide.  -90% PRO, it is not binary.
08h 11m 15.97s +01° 16' 05.5" P.A. 338.00 sep 33.4 mag 8.72,8.77 Sp G0

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