BU 665 BC: 508; 333x: A is Sadr, Gamma Cyg, quite bright, and with the water vapor in the sky cast a milky haze round. Several smaller/fainter stars lay scattered in the haze like debris from an explosion. Burnham discovered with 18.5-inch and noted the several smaller stars in the area. BC is a very close 1 delta magnitude pair of white stars, nicely if just split. WDS is uncertain. There is 9% parallax overlap, 1,128 AU weighted separation, and good solar masses 1.60/1.59. The problem is the radial velocity delta far exceeds the escape velocity, so they are not, or will not remain, gravitationally bound.
20h 22m 10.21s +40° 13' 06.7" P.A. 302.00 sep 1.9 mag 10.00,11.00
HO 128 AB: 508; 333x: Nice gold and blue pair, split at 205x, wider split at 333x. WDS gives physical with a 1027.9807-year period, and the orbit will rapidly close to periastron the next few decades. While an orbit is given, there is NO parallax range overlap, -59%, so likely with time this will prove not to be a gravitationally bound pair.
20h 22m 55.49s +42° 59' 00.4" P.A. 356.10 sep 1.3 mag 6.41,8.82 Sp G8III dist. 102.99 pc (335.95 l.y.)
A 727 AB: 508; 333x: Around 1 delta mag and pretty tough, can tell it is not single at 205x, split with seeing and a bit of averted vision with 333x. WDS is uncertain, however there is no parallax range overlap, -27%.
20h 23m 18.32s +48° 06' 44.2" P.A. 63.00 sep 0.9 mag 10.31,10.64 Sp G0
COU2641 AB: 508; 205x: Nicely split, slightly unequal white stars, very pretty. WDS uncertain, and unfortunately no parallax range overlap, -33%.
20h 23m 50.07s +41° 46' 29.8" P.A. 279.00 sep 1.0 mag 10.06,10.08 Sp K0 dist. 109.77 pc (358.07 l.y.)
ES 1331 AB: 508; 205x: Very fine near equal white stars, split nicely. WDS uncertain, however no parallax range overlap, -16%
20h 23m 57.00s +44° 56' 33.5" P.A. 78.00 sep 1.3 mag 10.43,10.81 Sp A5
ES 2694 AB: 508; 205x: Pretty double, white and much fainter wide B, like a fainter Struve. WDS uncertain, but it has a good chance of being gravitationally bound: 79% parallax range overlap, 4,220 AU weighted separation, 3.07/1.26 solar mass.
20h 24m 35.32s +48° 41' 34.1" P.A. 321.00 sep 11.9 mag 7.71,10.20 Sp B7V dist. 166.39 pc (542.76 l.y.)
D 22 AB: 508; 205x: Light yellow stars, 1 delta mag, well separated around 3". WDS uncertain, however the share 50% parallax range overlap, 198 AU weighted separation, 1.29/0.99 solar mass. Unfortunately the radial velocity difference (5.39) slightly exceeds the escape velocity (4.51), so they may not be gravitationally bound.
20h 25m 31.16s +40° 05' 50.8" P.A. 163.00 sep 2.9 mag 8.15,9.48 Sp F8V
A 291 AB: 508; 445x: Resolves, or rather the disks harden, with seeing. Well split, large around 2 delta mag, white stars. WDS uncertain. As exciting as this pair is, they do not share parallax ranges, -30%, so are not likely to be gravitationally bound.
20h 25m 16.06s +43° 55' 17.0" P.A. 148.00 sep 0.8 mag 9.85,10.42 Sp F0
A 293 AB: 508; 205x: Very beautiful near equal white stars, nice separation. WDS uncertain, and unfortunately they do not share their parallax range, -22% overlap.
20h 26m 51.14s +41° 51' 33.4" P.A. 119.00 sep 1.4 mag 9.57,9.62 Sp F5
20h 26m 51.14s +41° 51' 33.4" P.A. 119.00 sep 1.4 mag 9.57,9.62 Sp F5
COU2538 AB: 508; 333x: ! Perfect white stars, near equal, nice separation at 333x, suspected not single with 205x, part of a triangle of same mag white stars. WDS uncertain, however there is 35% parallax range overlap, 107 AU weighted separation, and equal 0.97 solar masses, so likely gravitationally bound.
20h 28m 17.00s +40° 05' 09.8" P.A. 31.00 sep 1.0 mag 10.40,10.42 Sp G0/5
BU 1135 AB: 508; 205x: Seen immediately but still tough. Very much fainter B and not too far separation, waited for the seeing to firm it to a sharp point. Burnham discovered with the 12-inch Lick refractor at 1.6". WDS uncertain. Parallax ranges just touch, they are separated by 0.1 parsecs, so it's perhaps possible they are gravitationally bound. 869 AU weighted separation, high solar mass 3.68/1.87.
20h 29m 08.29s +45° 44' 04.5" P.A. 335.00 sep 1.5 mag 8.19,10.60 Sp G5
ES 662 AB: 508; 205x: B is faint and just barely seen with direct vision due to the haze in the atmosphere, it brightens with averted vision and is well separated. WDS says physical based on the proper motions, and I would agree, adding: 97% parallax range overlap, 3,249 AU weighted separation, 2.66/1.41 solar mass.
20h 29m 27.73s +45° 15' 34.7" P.A. 142.00 sep 5.7 mag 9.72,11.90
HU 589 AB: 508; 205x: Half delta mag white stars, around 1.5" separation. WDS uncertain, but it is very likely gravitationally bound: 32% parallax overlap, 147 AU weighted separation, 1.05/0.94 solar mass.
20h 29m 59.62s +49° 40' 16.0" P.A. 204.00 sep 1.6 mag 9.83,10.33 Sp G0
AG 407 AB: 508; 205x: Equal white, wide stars. WDS uncertain, and no parallax data for the secondary, so can't determine.
20h 30m 14.38s +43° 43' 05.5" P.A. 231.00 sep 7.0 mag 9.94,10.13 Sp A2
BU 1136 AB: 508; 445x: Very nice, dull white A and 2 delta mag light blue B, perfect split with seeing. Small faint satellite made a slow pass during the observation, just missing the pair. Burnham noted "Recent measures are wanting" and WDS is still uncertain with 16 measures. Gaia is missing any 9th magnitude companion, so I wonder what's going on?
20h 31m 46.51s +49° 32' 32.5" P.A. 215.00 sep 0.7 mag 7.75,9.19 Sp B9 dist. 197.63 pc (644.67 l.y.)
A 736 AB: 508; 445x: Very tough, need to wait for the seeing to settle. 1 delta mag white stars, split. WDS uncertain, and unfortunately no parallax data for the secondary.
20h 32m 11.33s +46° 48' 16.4" P.A. 349.00 sep 0.6 mag 9.69,10.45 Sp A5
Ended the night with some pretty great views of Saturn and Jupiter...
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