Predicted above average seeing so I opened the 20-inch and observed from 10:30pm-12:30am. Seeing was pretty good, so I went for some movement pairs, but rather than improving through the night seeing became choppier. So, I switched back and forth with the 7-inch mask. Transparency was poor, and a haze slowly grew thicker as the night continued, with some dew.
B 430 AB: 508; 1270x: Single all powers. No Gaia parallax data. SOC grade 2 orbit, now at periastron 0.197", not in my reach.
19h 15m 32.40s -25° 15' 23.8" P.A. 104.00 sep 0.2 mag 5.50,5.70 Sp A8V+G8III dist. 91.49 pc (298.44 l.y.)
STFA 38 AD: 178; 140x: Zeta 2 Lyr. 1 Dm, wide, slight green tint. 83% PRO, 2119 AU WS, 2.5+1.8 Msol, RVD 1.2 < EV 1.9, and 0.05 PMV, it is possibly binary and needs an orbit. All the Burnham faint stars in this family have vastly differing parallax, they are not binary.
18h 44m 46.36s +37° 36' 18.4" P.A. 150.00 sep 43.7 mag 4.34,5.62 Sp F0IVv dist. 47.69 pc (155.56 l.y.)
BU 1127 AB: 178; 280x: Overlapping disks, 2 Dm. Currently 0.677", not quite resolvable (should have tried even higher magnification). No Gaia data for the secondary, an orbit should be tried.
18h 02m 30.89s +44° 14' 02.6" P.A. 39.00 sep 0.7 mag 7.31,9.20 Sp F5V dist. 81.3 pc (265.2 l.y.)
BU 1202 AB: 508; 1270x: Elongated most powers until I can get two photocenters at high power, white stars. It was 0.656" in 2013, difficult to say it would have closed below my Dawes limit so quickly, unless I observed the wrong star. An orbit can be tried. No Gaia data for the secondary.
18h 01m 32.36s +03° 31' 27.4" P.A. 344.00 sep 0.7 mag 8.67,9.69 Sp A0 dist. 246.91 pc (805.42 l.y.)
HU 235 AB: 178; 280x: Very fine close split, 3 Dm. 35% PRO, 121 AU WS, 1.8+1,0 Msol, 0.05 PMV, it is possibly binary and needs an orbit tried.
17h 57m 05.08s +45° 51' 21.4" P.A. 289.00 sep 1.8 mag 6.88,9.04 Sp F7IV dist. 70.03 pc (228.44 l.y.)
LDS6413 AB: 508; 140x: Superwide, need to pan the scope. B is 11-12 mag. -17% PRO, it is not binary.
18h 00m 38.89s +29° 34' 18.9" P.A. 105.00 sep 88.1 mag 7.08,13.10 Sp G2V+M dist. 28.36 pc (92.51 l.y.)
MLR 571 AB: 508; 1270x: Single all powers. No Gaia data for secondary. SOC grade 3 orbit, 71-year period, periastron in 2045 at 0.18"
17h 33m 31.60s +57° 33' 31.4" P.A. 330.00 sep 0.1 mag 7.23,6.87 Sp A5V+G5III dist. 250 pc (815.5 l.y.)
STF2161 AB: 178; 140x: 1 Dm, very slight green tint to each star, well separated. -41% PRO, it is not binary.
17h 23m 40.97s +37° 08' 45.3" P.A. 321.00 sep 4.0 mag 4.50,5.40 Sp B9.5III dist. 120.63 pc (393.5 l.y.)
STF2245 BA: 178; 140x: White, unequal stars, good split. -74% PRO, it is not binary.
17h 56m 24.24s +18° 19' 38.1" P.A. 112.00 sep 2.7 mag 7.43,7.55 Sp A0III dist. 240.96 pc (786.01 l.y.)
STF2264 AB: 178; 140x: 95 Her. Bright well separated, unequal, both light yellow, the fainter star a slightly richer yellow. 95% PRO, 842 AU WS, 3.6+3.6 Msol, RVD 0.6 < EV 3.9, PMV 0.08, it is likely binary and needs an orbit.
18h 01m 30.41s +21° 35' 44.8" P.A. 255.00 sep 6.4 mag 4.85,5.20 Sp A5IIIn dist. 127.88 pc (417.14 l.y.)
STF2282 AB: 178; 140x: Unequal, well split. Missed opportunity, BC is a 0.2" pair, need to reobserve.
18h 06m 30.47s +40° 21' 39.6" P.A. 83.00 sep 2.7 mag 7.93,9.43 Sp A1V dist. 512.82 pc (1672.82 l.y.)
STF2384 AB: 508; 560x: Fine white pair, 1 Dm, good split at high powers, suspected double at lower powers. No Gaia data for the secondary. SOC grade 3 orbit 133-year period, it is widening toward >0.8" periastron in the 2070s.
18h 38m 23.66s +67° 07' 35.6" P.A. 307.00 sep 0.4 mag 8.31,8.95 Sp G5 dist. 53.82 pc (175.56 l.y.)
STF3127 AB: 178; 280x: Light blue-green stars, split low to high, large Dm. -94% PRO, it is not binary. It's odd that such disparate stars appear the same odd color
17h 15m 01.92s +24° 50' 22.5" P.A. 291.00 sep 13.8 mag 3.12,8.30 Sp A3IV dist. 23.04 pc (75.16 l.y.)
STF3129 AB: 178; 140x: Easy wide 3 Dm pair. -14% PRO, it is not binary.
18h 01m 07.16s +45° 21' 03.3" P.A. 168.00 sep 30.8 mag 7.59,10.64 Sp B9 dist. 132.28 pc (431.5 l.y.)
STT 331 AB: 178; 280x: Lovely close split, >1 Dm. 8% PRO, 520 AU WS, 3.6+2.9 Msol, 0.05 PMV, it is possible to be binary and an orbit can be tried.
17h 32m 02.86s +02° 49' 25.4" P.A. 353.00 sep 1.0 mag 7.74,8.82 Sp B5V dist. 476.19 pc (1553.33 l.y.)
STT 341 AB: 508; 560x: Excellent close split, light dull yellow stars, 1 Dm, near a pretty arc of similar magnitude stars. No Gaia parallax data. SOC grade 2 orbit 20-year period, it is widening to periastron in 2029, moving from ESE to SE PA.
18h 05m 49.72s +21° 26' 45.6" P.A. 89.00 sep 0.3 mag 7.39,8.82 Sp G0V+G5V dist. 39.45 pc (128.69 l.y.)
STT 344 AB: 178; 390x: Very fine split, large delta, faint B. -46% PRO, it is not binary.
18h 07m 06.29s +49° 42' 37.6" P.A. 140.00 sep 2.3 mag 6.47,10.31 Sp A2V dist. 221.24 pc (721.68 l.y.)
STT 400 AB: 508; 560x: 1 Dm light orange stars, easy split, suspected low powers, split 280x, nicer view higher powers. No Gaia parallax for the secondary. SOC grade 2 orbit, 85.61-year period, it is at periastron now and will rapidly close through the 2040s.
20h 10m 13.32s +43° 56' 44.2" P.A. 329.00 sep 0.7 mag 7.60,9.83 Sp G3V dist. 51.33 pc (167.44 l.y.)
No comments:
Post a Comment