Saturday, November 25, 2023

20 november 2022, Camelopardalis Struves

Used the 6-inch refractor, weather cold but dry, transparent sky but the seeing was choppy early, improved after 10pm.

STF 419 AB 152; 150x: Near equal white stars, close split with low power, improved with 150x.  Split with 60mm 90x.  -89% PRO, it is not binary.
03h 42m 45.19s +69° 50' 44.3" P.A. 73.00 sep 2.9 mag 7.76,7.81 Sp A5IV dist. 310.56 pc (1013.05 l.y.)

STF 418 AB: 152; 125x: Dim pair, wide, forms a string of three, one of which brightens with averted vision (FOX 133 BC).  -84% PRO, it is not binary (nor is BC)
03h 46m 20.22s +75° 22' 30.7" P.A. 64.00 sep 24.2 mag 9.75,10.38 Sp G

STF 421 AB: 152; 150x: B appears with averted vision, can just barely hold it direct, wide.  -4% PRO, 2,290 AU WS, 2.8+1.1 Msol, but the RVD 4.3 > EV 1.7, it is not binary.
03h 46m 13.88s +71° 37' 05.3" P.A. 236.00 sep 12.5 mag 7.07,10.69 Sp G9III dist. 182.82 pc (596.36 l.y.)

STF 428 AB: 152; 125x: Dim unequal stars, wide, with third with averted vision (BU 1380).  -86% PRO, it is not binary.  
03h 47m 46.60s +70° 32' 57.7" P.A. 145.00 sep 25.3 mag 8.91,11.13 Sp A2 dist. 344.83 pc (1124.84 l.y.)

STF 455 AB: 152; 125x: Faint, unequal, wide.  -34% PRO, it is not binary (nor is AC).
03h 57m 07.09s +69° 30' 56.4" P.A. 166.00 sep 12.1 mag 8.56,9.16 Sp G5 dist. 229.36 pc (748.17 l.y.)

STF 373 AB: 152; 125x: Triangle of equal magnitude stars, one with a faint wide companion.  -37% PRO, it is not binary.
03h 22m 04.87s +62° 44' 29.2" P.A. 120.00 sep 20.0 mag 7.73,10.01 Sp F8 dist. 123.15 pc (401.72 l.y.)

STF 374 AB: 152; 125x: 1 Dm, well split.  -8% PRO, 1,389 AU WS, 1.8+1.4 Msol, RVD 1.2 < EV 2.0, there is some chance it is binary and an orbit should be tried.
03h 24m 14.96s +67° 27' 18.6" P.A. 297.00 sep 11.2 mag 7.80,8.99 Sp F8 dist. 142.05 pc (463.37 l.y.)

STF 362 AB: 152; 125x: Near equal white stars, in a rich field (open cluster Stock 23, aka Pazmino's Cluster).  -64% PRO, it is not binary.  
03h 16m 17.37s +60° 02' 07.1" P.A. 142.00 sep 7.1 mag 8.31,8.60 Sp B3V

STF 378 AB: 152; 125x: Unequal wide pair.  -42% PRO, it is not binary.
03h 24m 27.21s +58° 25' 52.0" P.A. 314.00 sep 18.7 mag 9.55,10.64 Sp F

STF 384 AB: 152; 200x: Very fine, 1 Dm very close split, seen with 125x, best with high.  26% PRO, 1,410 AU WS, 4.8+3.4 Msol, it is possibly binary and needs an orbit tried.
03h 28m 29.05s +59° 54' 24.0" P.A. 273.00 sep 2.0 mag 8.13,8.85 Sp F8 dist. 757.58 pc (2471.23 l.y.)

STF 385 AB: 152; 125x: Could not resolve faint B, too close to the bright primary.  48% PRO, 2,302 AU WS, 11.7+4.6 Msol, it is likely binary and needs an orbit.
03h 29m 04.14s +59° 56' 25.2" P.A. 162.00 sep 2.3 mag 4.23,7.80 Sp B9Ia dist. 595.24 pc (1941.67 l.y.)

STF 400 AB: 152; 200x: Beautiful, close split with a large Dm.  -41% PRO, it is not binary, though there is a SOC grade 3 orbit 267-year period.
03h 35m 01.04s +60° 02' 29.0" P.A. 269.00 sep 1.6 mag 6.79,7.97 Sp F3V dist. 53.36 pc (174.06 l.y.)

STF 445 AB: 152; 150x: Close split, large Dm, in an arc of three stars of similar magnitude.  -48% PRO, it is not binary.
03h 50m 39.22s +60° 07' 22.8" P.A. 259.00 sep 3.1 mag 8.97,9.90 Sp B5 dist. 1149.43 pc (3749.44 l.y.)

STF 397 AB: 152; 125x: Faint, well split, unequal.  12% PRO, 2,395 AU WS, 2.5+1.7 Msol, it is possibly binary and an orbit should be tried.
03h 33m 59.02s +60° 24' 31.9" P.A. 42.00 sep 5.2 mag 9.33,10.46 Sp A0 dist. 12500 pc (40775 l.y.)

STF 402 AB: 152; 125x: A is light orange, B flashes with averted vision, then can be held direct.  Well split.  -92% PRO, it is not binary.
03h 36m 03.81s +63° 17' 17.2" P.A. 165.00 sep 12.0 mag 7.58,10.49 Sp K4III dist. 1818.18 pc (5930.9 l.y.)

STF 389 AB: 152; 150x: Very light-yellow A and very light-blue B, about 1 Dm, split with 125x but better seen 150x.  Also hairline split with 60mm 90x.  -40% PRO, it is not binary.
03h 30m 10.93s +59° 21' 57.8" P.A. 72.00 sep 2.6 mag 6.42,7.89 Sp A2V dist. 95.15 pc (310.38 l.y.)

STF 396 AB: 152; 125x: Wide unequal pair, also split with 60mm 40x.  70% PRO, 1,925 AU WS, 2.1+1.5 Msol, and the RVD 1.1 < EV 1.8.  It is likely binary and needs an orbit.
03h 33m 32.19s +58° 45' 55.3" P.A. 245.00 sep 20.5 mag 6.43,7.68 Sp A4III dist. 21.34 pc (69.61 l.y.)

STF398 AB: 152; 125x: Very faint pair, averted vision only, near equal, well split. 10.3/10.3 9.6 very faint av only well split.  Gaia puts the magnitudes at 11.33/11.35.  -67% PRO, they are not binary.
03h 34m 15.03s +58° 17' 28.6" P.A. 332.00 sep 9.6 mag 10.30,10.30

STF 390 AB: 152; 125x: Bright white A and faint B, >3 Dm, well split.  -79% PRO, it is not binary.
03h 30m 00.23s +55° 27' 06.6" P.A. 159.00 sep 14.6 mag 5.06,10.02 Sp A1V dist. 60.9 pc (198.66 l.y.)

STF 461 AB: 152; 200x: Notched elongation, very small scale, with high power only. 65% PRO, 298 AU WS, 2.5+1.5 Msol, it is likely binary and needs an orbti.
03h 55m 24.47s +56° 30' 16.4" P.A. 121.00 sep 1.0 mag 8.58,10.33 Sp G0II

STF 472 BC: 152; 125x: Very faint near equal pair, well split, widely split another similar magnitude star (AB).  21% PRO, 2,824 AU WS, 1.9+1.7 Msol, and the RVD 0.6 < EV 1.5.  It is likely binary and needs an orbit.
04h 06m 20.49s +72° 02' 17.7" P.A. 16.00 sep 6.9 mag 10.49,10.79 Sp G0

STF 474 AB: 152l 125x: Wide near equal.  -89% PRO, it is not binary.
04h 12m 33.44s +76° 14' 12.5" P.A. 151.00 sep 24.3 mag 9.54,9.84 Sp G5

STF 480 AB: 152; 125x: Excellent near equal close pair, split even with low power.  -35% PRO, it is not binary.  
04h 04m 29.36s +55° 44' 26.2" P.A. 327.00 sep 3.4 mag 9.33,9.53 Sp K0III dist. 378.79 pc (1235.61 l.y.)

STF 484 AG: 152; 125x: 3 Dm pairing withing the cluster NGC 1502, very wide.  -10% PRO, it is not binary.  There are many other stars in the cluster, almost all of non-overlapping parallax ranges, or with weighted separations too far apart to support binarity.
04h 07m 51.38s +62° 19' 48.4" P.A. 260.00 sep 59.9 mag 6.91,9.63 Sp B0III dist. 159.24 pc (519.44 l.y.)

STF 485 AE: 152; 125x: Bright white stars near equal wide in center of open cluster NGC 1502.  -66% PRO, it is not binary.
04h 07m 51.38s +62° 19' 48.4" P.A. 305.00 sep 18.0 mag 6.91,6.94 Sp B0II+B0II dist. 159.24 pc (519.44 l.y.)

STF 486 AB: 152; 125x: Very faint, unequal, seen first with averted vision then can hold, wide.  -89% PRO, it is not binary.
04h 19m 48.83s +79° 28' 57.7" P.A. 355.00 sep 8.2 mag 10.12,11.60 Sp A2

STF 490 AB: 152; 125x: Near equal, nice wide split, white.  -52% PRO, it is not binary.
04h 10m 27.73s +60° 09' 23.8" P.A. 58.00 sep 4.7 mag 9.33,9.59 Sp F0

STF 496 AB: 152; 125x: Faint, wide, slightly unequal, one of three faint stars in a triangle.  -90% PRO, it is not binary.
04h 16m 29.93s +70° 30' 28.8" P.A. 58.00 sep 30.8 mag 11.33,10.89 Sp F6V+K2V

STF 498 AB: 152; 200x: Very difficult at this aperture, high power needed to separate two faint stars, with seeing only.  -89% PRO, it is not binary.
04h 12m 45.23s +53° 46' 19.3" P.A. 159.00 sep 1.4 mag 10.13,10.75 Sp A0 dist. 202.43 pc (660.33 l.y.)

STF 503 AB: 152; 150x: Faint unequal pair, seen directly but brightens with averted vision.  -38% PRO, it is not binary.
04h 17m 04.19s +64° 08' 18.5" P.A. 228.00 sep 4.9 mag 10.49,10.58

STF 504 AB: 152; 125x: Unequal, fairly close separation. 39% PRO, 4,648 AU WS, 3.4+2.4 Msol, the RVD 1.5 = EV 1.5, so there's a chance it's binary and needs an orbit tried.
04h 18m 18.53s +67° 33' 49.4" P.A. 267.00 sep 7.0 mag 9.30,10.52 Sp K0

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