Observed with the 20-inch and did some adjustment to the focuser alignment to improve collimation -- it helped. The seeing forecast was good, but the actual seeing was quite choppy, so I masked down to 7-inches. I went after mostly Struves and a couple Burnhams for good measure.
STF2579 AB: 178; 145x: Bright light yellow-white A, yellow B very closely split with a large Dm. WDS orbital solution 657-year period. No Gaia data for the companion.
19h 44m 58.44s +45° 07' 50.5" P.A. 214.40 sep 2.8 mag 2.89,6.27 Sp B9.5IV dist. 50.58 pc (164.99 l.y.)
19h 43m 47.09s +38° 19' 20.5" P.A. 196.00 sep 1.0 mag 7.59,8.23 Sp B5V dist. 675.68 pc (2204.07 l.y.)
STT 383 AB: 178; 570x: Split at best moments of seeing, but not steady. Notched elongation mostly with noticeable Dm. WDS orbital solution 1125-year period. There is 51% overlap of the parallax ranges, only 171 AU weighted separation, 2.7+2.1 Msol, so this very likely is binary.
19h 42m 56.26s +40° 43' 18.3" P.A. 14.50 sep 0.8 mag 7.03,8.28 Sp B9.5V dist. 154.56 pc (504.17 l.y.)
STF2486 AB: 178; 145x: Yellow stars, near equal, well separated. WDS orbital solution 3100-year period. There is 84% overlap of the parallax ranges, only 189 AU weighted separation, 1.1+1.1 Msol, and the radial velocity delta 0.2 is less than the escape velocity 4.5, so it certainly is binary.
19h 12m 05.03s +49° 51' 20.7" P.A. 203.40 sep 7.1 mag 6.54,6.67 Sp G2V+G3V dist. 24.45 pc (79.76 l.y.)
STF2496 AB: 178; 245x: Super difficult at this aperture, bright light-yellow A needs to appear as a disk in best seeing, and then with foveal coaxing B appears as a tiny dot out of A's diffraction ring. WDS uncertain, but there is no overlap of the parallax ranges, -78%, it is not binary.
19h 15m 19.18s +50° 04' 16.0" P.A. 81.00 sep 2.1 mag 6.46,10.00 Sp G8III dist. 134.59 pc (439.03 l.y.)
STF2511 AB: 178; 200x: Tough for the aperture, light orange A and very faint B, good separation around 2", seen with averted vision but can just hold B direct. WDS uncertain, but there is no overlap of the parallax ranges, -95%, it is not binary.
19h 20m 31.45s +50° 20' 24.5" P.A. 53.00 sep 7.2 mag 7.51,11.10 Sp K5 dist. 293.26 pc (956.61 l.y.)
STF2555 AB: 178; 200x: Faint pair, noticeable delta magnitude, split with 145x but better with slightly higher magnification. WDS uncertain, but there is no overlap -14% of the parallax ranges, it is not binary.
19h 36m 11.77s +53° 22' 28.5" P.A. 283.00 sep 1.8 mag 9.42,9.90 Sp F5
STF2598 AB: 178; 145x: Light orange A and wide, very faint B, on the edge of direct and averted vision. WDS says it is not physical, and there is no overlap of the parallax ranges, -44%, it is not binary.
19h 50m 07.53s +54° 39' 06.5" P.A. 150.00 sep 11.8 mag 8.17,10.58 Sp K5 dist. 317.46 pc (1035.55 l.y.)
STF2605 AB: 178; 200x: Bright white A and a large delta magnitude yellow B, close split. WDS uncertain, but there is 81% parallax range overlap, only 254 AU weighted separation, 2.9+1.6 Msol, so it is likely binary.
19h 55m 37.82s +52° 26' 20.5" P.A. 175.00 sep 2.9 mag 5.03,7.52 Sp A4Vn dist. 86.28 pc (281.45 l.y.)
STF2611 AB: 178; 145x: Easy, well split, near equal light-yellow stars.
19h 58m 51.90s +47° 21' 48.2" P.A. 208.00 sep 5.2 mag 8.47,8.48 Sp K0 dist. 294.99 pc (962.26 l.y.)
STFA 46 AB: 178; 145x: Easy, wide, white, near equal, bright. WDS says parallax indicates physical and provides an orbital solution "Periods range from 209 - 290 centuries. Based on predicted mass sums from these various orbital elements, the 135-century solution of Hauser & Marcy (1999) appears at present to give the most realistic results." There is 72% parallax range overlap, 836 AU weighted separation, 1.2+1.1 Msol, and the radial velocity delta 0.2 is less than the escape velocity 2.2, so it is binary.
19h 41m 49.09s +50° 31' 31.6" P.A. 133.00 sep 39.7 mag 6.00,6.23 Sp G1.5V dist. 21.08 pc (68.76 l.y.)
BU143 AB: 178; 145x: Beautiful tight pair, 1 Dm, about 2" separation. More clearly see the split at 200x. WDS uncertain, but there is -13% parallax range overlap, they likely are not binary.
19h 29m 55.29s +49° 30' 31.4" P.A. 192.00 sep 2.2 mag 8.38,9.48 Sp B9 dist. 602.41 pc (1965.06 l.y.)
BU656 AB: 178; 285x: Super tough at this aperture, very tight split with seeing, and >1 Dm. WDS uncertain, and there is no parallax data for the companion.
19h 38m 51.52s +51° 50' 03.3" P.A. 274.00 sep 1.0 mag 8.75,9.65 Sp G5 dist. 152.91 pc (498.79 l.y.)
STF2428 AB: 178; 145x: White A and well separated, 2 Dm B. WDS says it is not physical, and there is -78% parallax range overlap, it is not binary.
18h 59m 56.53s +14° 54' 39.9" P.A. 287.00 sep 6.9 mag 8.22,10.31 Sp F2
STF2434 A-BC: 178; 145x: Very wide, nearly 1 Dm. WDS is uncertain, and there is no Gaia data. Need ro reobserve, BC is 9.68/9.38 0.8" 975-year period.
19h 02m 44.38s -00° 42' 40.4" P.A. 88.00 sep 27.8 mag 8.44,8.93 Sp G5
STF2447 AB: 178; 145x: Wide 3Dm pair. WDS uncertain, but there is 7% parallax range overlap, 5,760 AU weighted separation, 4.1+2.1 Msol, so there is some possibility it is binary.
19h 06m 35.11s -01° 20' 46.0" P.A. 343.00 sep 14.1 mag 6.83,9.62 Sp B5V dist. 135.14 pc (440.83 l.y.)
STF2468 AB: 178; 145x: Wide 1 Dm. WDS says parallax indicates physical. There is 33% overlap of the parallax ranges, 781 AU weighted separation, 1.4+1.0 Msol, and the radial velocity delta 1.1 is less than the escape velocity 2.3, so it very likely is binary.
19h 10m 13.13s +08° 40' 57.0" P.A. 258.00 sep 7.7 mag 8.80,9.66 Sp G0
STF2490 AB: 178; 145x: Closely separated, 2 Dm, averted vision needed. WDS uncertain, but there is 41% parallax range overlap, 3,847 AU weighted separation, 4.0+2.9 Msol, so it is very possibly binary.
19h 17m 59.96s -03° 28' 22.9" P.A. 247.00 sep 3.5 mag 9.18,11.40 Sp B8
STF2501 AB: 178; 145x: Wide, nearly 2 Dm. WDS says this is physical, but there is -11% parallax range overlap, it is not likely binary.
19h 22m 03.68s -04° 44' 20.0" P.A. 21.00 sep 20.0 mag 7.76,9.67 Sp F5 dist. 97.66 pc (318.57 l.y.)
STF2503 AB: 178; 185x: Tough, very closely split, with seeing, 1 Dm, faint pair. WDS says it is not physical, but there is 76% parallax range overlap, only 473 AU weighted separation, 1.7+1.5 Msol, and the radial velocity delta 0.6 is less than the escape velocity 3.5, it is clearly a binary.
19h 22m 42.04s -07° 07' 41.2" P.A. 286.00 sep 2.4 mag 9.00,9.65 Sp F0
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