24 june 2022

Seeing was supposed to be better than it was, but after a hot day it's no surprise there was a lot of radiational cooling. I used the 6-inch and continued to observe some Struve pairs.  There was some haze in the sky and seeing seemed to get worse.  I felt tired so only observed to 10:30pm.

STF2381 AB: 152; 125: White A and 2 Dm, well split B.  WDS says it's physical, but there is no overlap -3% of the parallax ranges, and the radial velocity delta 2.8 exceeds the escape velocity 1.7, so it is not likely binary.
18h 45m 30.77s +28° 15' 24.3" P.A. 122.00 sep 8.9 mag 8.27,10.36 Sp G8III/IV dist. 259.74 pc (847.27 l.y.)

STF2386 AB 152; 125x: Faint pair, near equal, wide.  WDS says it is not physical, and there is no -92% overlap of the parallax ranges, it is not binary.
18h 45m 14.35s +35° 32' 21.1" P.A. 18.00 sep 21.1 mag 9.42,10.04 Sp A0

STF2387 AB: 152; 125x: White A and 2 Dm wide B, attractive pair.  No records found in WDS.

STF2390 AB: 152; 125: Very pretty, pure white A, and 2 Dm B, closely split around 4".  WDS uncertain, but there is 59% parallax range overlap, 1,323 AU weighted separation, 3.2+2.2 Msol, so it is likely binary.
18h 45m 49.83s +34° 31' 06.6" P.A. 155.00 sep 4.3 mag 7.37,8.56 Sp A7V dist. 357.14 pc (1164.99 l.y.)

STF2392 AB 152; 150x: Very finely split 2 Dm pair, B is faint but is just detectable with direct vision, suspect at 125x, better view at higher power.  WDS uncertain, but there is no parallax range overlap, -40%, so in spite of the 1,229 AU weighted separation, 2.2+1.6 Msol, and the radial velocity delta 1.4 is less than the escape velocity 2.4, it is not likely to be binary.
18h 45m 09.99s +39° 13' 32.8" P.A. 319.00 sep 2.5 mag 9.25,11.07 Sp A2 dist. 934.58 pc (3048.6 l.y.)

STF2393 AB: 152; 125x: Very much fainter B, around 3 Dm, wide.  WDS says not physical, and there is no -92% parallax range overlap, it is not binary.
18h 45m 10.84s +38° 18' 54.6" P.A. 24.00 sep 18.2 mag 7.80,10.40 Sp K5III dist. 689.66 pc (2249.67 l.y.)

STF2394 AB: 152; 125x: Faint pair, fairly well spilt, 1 Dm.  WDS says parallax indicates physical, but in fact Gaia DR3 indicates there is no overlap of the parallax ranges, -63%, they are not binary.
18h 45m 28.48s +42° 02' 07.4" P.A. 203.00 sep 6.9 mag 9.61,9.96

STF2395 AB: 152; 125x: 2 Dm, B is quite faint but can see with direct vision, well split, looks like a planet in relation to A.  WDS says this is physical, but there is no overlap of the parallax ranges, and the radial velocity delta 2.1 exceeds the escape velocity 1.8, 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.)

STF2397 AB: 152; 125x: Light yellow A and 2 Dm B, fairly closely split around 4".  WDS is uncertain, but there is 14% overlap of the parallax ranges, 1,098 AU weighted average separation, 3.2+1.8 Msol, so this is likely binary.
18h 47m 13.09s +31° 24' 20.2" P.A. 269.00 sep 3.9 mag 7.47,9.08 Sp G3III dist. 271 pc (884 l.y.)

STF2406 AB: 152; 125x: Comparatively bright white A, B is very faintly visible with foveal coaxing but it fades quickly, cannot hold it direct.  WDS says this is physical, but there is no overlap of the parallax ranges, -25%, and in spite of the small 690 AU weighted separation, 2.3+0.9 Msol, and nearly equivalent radial velocity delta 2.9 vs. 3.0 escape velocity, it is not likely binary.

18h 49m 55.77s +26° 25' 30.6" P.A. 4.00 sep 4.6 mag 7.12,11.21 Sp A3V dist. 118.34 pc (386.03 l.y.)