2 august 2026

Another night out with the 20-inch, and again seeing wasn't what it could have been, so I masked down to 7-inches for most of it.  I observed for around an hour before turning in, tired.  Tonight, seeing is supposed to be excellent, so hope for better luck.

STF 2271 AB: 178; 200x: White A and dull red B, well separated, 1 Dm.  -41% PRO, it is not binary.

18h 00m 18.74s +52° 51' 15.4" P.A. 267.00 sep 3.5 mag 8.17,9.24 Sp G0 dist. 60.42 pc (197.09 l.y.)

STF 2280 AB: 178; 140x: Bright white near equal, wide.  95% PRO, 905 AU WS, 2.0+2.0 Msol, it is likely binary and needs an orbit.

18h 07m 49.56s +26° 06' 04.4" P.A. 183.00 sep 14.4 mag 5.81,5.84 Sp A3V dist. 49.6 pc (161.8 l.y.)

STF 2285 AB: 178; 140x: Faint, well separated, 1 Dm.  93% PRO, 1963 AU WS, 3.0+2.2 Msol, it is possibly binary and needs an orbit.

18h 09m 15.12s +13° 29' 06.2" P.A. 333.00 sep 3.6 mag 8.75,9.82 Sp A0 dist. 1408.45 pc (4594.36 l.y.)

STF 2289 AB: 178; 200x: Very pretty, nearly 1 Dm, closely split white stars.  31% PRO, 406 AU WS, 3.3+4.1 Msol, it is possibly binary and needs an orbit.

18h 10m 08.69s +16° 28' 35.0" P.A. 219.00 sep 1.3 mag 6.65,7.21 Sp A0V+G0III dist. 263.85 pc (860.68 l.y.)

STF 2294 AB: 178; 200x: Very light orange unequal stars, close split.  46% PRO, 108 AU WS, 1.4+1.3 Msol, it is possibly binary and needs an orbit.

18h 14m 33.68s +00° 10' 32.9" P.A. 93.00 sep 1.4 mag 8.22,8.55 Sp F2 dist. 114.42 pc (373.24 l.y.)

STF 2296 AB: 178; 280x: Faint reddish A and extremely faint small B seen with averted vision only and higher powers.  -43% PRO, it is not binary.

18h 15m 42.45s -03° 21' 27.6" P.A. 6.00 sep 3.2 mag 7.48,10.22 Sp K0 dist. 199.2 pc (649.79 l.y.)

STF 2300 AB: 178; 140x: White A and faint well separated B, fainter 11.8 magnitude D with foveal coaxing completes a triangle which explains why all were measured.  AB -94% PRO, not binary.  A 239 BC however share 27% PRO, 1326 AU WS, 1.5+1.1 Msol, RVD 1.1 < EV 1.8, and PMV 0.09, it is likely binary and needs an orbit. Aitken must have inferred its binarity from the PM data at the time.

AB: 18h 09m 18.77s +59° 45' 02.9" P.A. 51.00 sep 12.1 mag 9.24,11.12 Sp A2

BC: 18h 09m 20.03s +59° 45' 13.3" P.A. 188.00 sep 3.9 mag 11.12,13.40 Sp G0IV+G5V

STF 2311 AB: 178; 140x: Very fine unequal faint stars at the tip of a triangle similar magnitude stars (the asterism explaining why they were all measured).  -68% PRO, it is not binary.

18h 22m 14.28s +11° 26' 00.7" P.A. 84.00 sep 3.0 mag 9.65,10.79 Sp K5 dist. 243.31 pc (793.68 l.y.)

STF 2323 AB: 178; 200x: Bright white A and light blue-white B, much fainter, good separation with low, power, nicely seen with medium.  30% PRO, 220 AU WS, 2.3+1.2 Msol, it is possibly binary and needs an orbit.

18h 23m 54.65s +58° 48' 02.1" P.A. 347.00 sep 3.7 mag 5.06,8.07 Sp A1V dist. 56.47 pc (184.21 l.y.)

STF2333 AB: 178; 140x: Near equal light orange stars, well split.  -12% PRO, it is not binary.

18h 31m 06.94s +32° 14' 43.4" P.A. 333.00 sep 6.3 mag 7.82,8.57 Sp B9IV dist. 216.92 pc (707.59 l.y.)

STF 2395 AB: 178; 140x: Red A, B well separated but averted vision only.  -23% PRO, it is not binary.

18h 45m 03.66s +46° 08' 07.5" P.A. 308.00 sep 8.5 mag 7.89,10.49 Sp A0 dist. 236.97 pc (773 l.y.)