30 september 2022

Opened up the 20-inch in what seems to be a long while.  Clear with good seeing, observed for a couple hours until 11pm when transparency started to fail.  

A 1669 AB: 508; 300x: Light orange A, B is quite faint, seen direct, closely split.  Spectral class yellow-orange.  WDS says physical, and there is just 1% overlap of the parallax ranges, 273 AU weighted separation, 0.9+0.8 Msol, so there is some possibility it is binary.
22h 28m 13.25s +23° 31' 57.2" P.A. 332.00 sep 5.8 mag 9.05,9.67 Sp K0IV dist. 51.71 pc (168.68 l.y.)

OL 174 AB: 508; 300x: Finely split, faint slightly equal pair.  WDS uncertain, but there is no overlap of the parallax ranges, -37%, it is not binary.

20h 17m 52.99s +13° 45' 26.8" P.A. 229.00 sep 1.6 mag 11.02,11.14

J 553 AB: 508; 150x: Faint, wide, 1 Dm.  WDS uncertain, but there is no parallax range overlap -73%, it is not binary.
20h 18m 06.69s +15° 54' 09.5" P.A. 20.00 sep 3.7 mag 10.70,11.90 Sp B2+A2

STF2662 AB: 508; 300x: White, 2 Dm, close but nicely split.  WDS uncertain, but there is -15% overlap of the parallax ranges, it is not binary.
20h 18m 33.25s +10° 59' 31.5" P.A. 42.00 sep 2.0 mag 8.69,10.30 Sp A3

A 1671 AB: 508; 300x: Well split, near equal faint pair.  WDS uncertain, but there is 57% parallax range overlap, 692 AU weighted separation, 1.7+1.7, and the radial velocity delta 0.1 is less than the escape velocity 2.9, so it is very probably binary and needs an orbit.
20h 18m 36.57s +13° 17' 52.7" P.A. 229.00 sep 2.2 mag 10.24,10.32 Sp F8

BU 664 AB: 508; 225x: Extremely faint B seen with averted vision, widely separated from bright white A.  WDS uncertain, but there is 92% parallax range overlap, 4,427 AU weighted separation, 4.1+1.2 Msol, but the radial velocity delta 4.1 exceeds the escape velocity 1.4, so it may not remain a binary.
20h 24m 33.24s +05° 30' 34.1" P.A. 287.00 sep 9.0 mag 7.23,12.70 Sp B8V dist. 425.53 pc (1388.08 l.y.)

BU 363 AB: 508; 300x: Very faint B held after foveal coaxing, well separated, bright white A.  WDS uncertain, but there is no overlap of the parallax ranges, -92%, so it is not binary.
20h 30m 58.10s +20° 36' 21.6" P.A. 88.00 sep 5.7 mag 6.18,12.00 Sp A1m dist. 86.28 pc (281.45 l.y.)

STF2696 AB: 508; 530x: Very nice, near equal, white, split.  WDS uncertain, and there is no parallax data for the pair.
20h 33m 31.54s +05° 26' 31.9" P.A. 299.00 sep 0.5 mag 7.93,8.71 Sp A2V

FOX 37 AB: 508; 225x: Very fine faint pair, slight detla magnitude, split.  WDS uncertain, there is 2% parallax range overlap, 652 AU weighted separation, 1.8+1.6 Msol, so it may be binary.
20h 33m 59.78s +13° 27' 53.7" P.A. 57.00 sep 1.3 mag 10.90,11.23

BU 288 AB: 508; 150x: Extremely faint B, wide.  WDS uncertain, but there is no overlap -65% of the parallax ranges, it is not binary.  This was an early Burnham discovery on the 26-inch USNO refractor with four faint pairings; I think he was over-excited to see more faint stars, and in this case ones relatively close to a star.
20h 39m 04.97s +15° 50' 17.6" P.A. 154.00 sep 5.2 mag 5.97,12.40 Sp B3V dist. 413.22 pc (1347.92 l.y.)

STF2722 AB: 508; 150x: Easy, 2 Dm, wide, white stars.  WDS says it's physical, but there is no overlap of the parallax ranges, -16%, it is not binary.
20h 43m 38.82s +19° 43' 40.7" P.A. 306.00 sep 7.5 mag 8.32,8.94 Sp G5 dist. 239.23 pc (780.37 l.y.)

BU 64 AB: 508; 525x: Part of a wide equal pair, this one has a similar PA as the wide, but is very closely split, with a slight delta magnitude, white stars.  WDS grade 4 orbit, 2559-year period, but there is no overlap of the parallax ranges, -29%, this is not binary.
20h 45m 00.23s +12° 43' 36.5" P.A. 357.60 sep 0.6 mag 9.14,8.56 Sp G dist. 106.5 pc (347.4 l.y.)

BU 834 AB: 508; 150x: Light yellow A and 3 Dm, nicely split B.  WDS uncertain, but there is no overlap of the parallax ranges, -45%, it is not binary.
20h 45m 41.28s +07° 09' 11.6" P.A. 134.00 sep 2.4 mag 9.03,11.18 Sp K0

STF2735 AB: 508; 225x: Light yellow, nicely split, almost 2 Dm.  WDS says it's physical, and there is 7% parallax range overlap, 224 AU weighted separation, 1.8+2.5 Msol, so it is probably binary.
20h 55m 40.64s +04° 31' 57.7" P.A. 282.00 sep 2.0 mag 6.45,7.54 Sp G6III-IV dist. 141.64 pc (462.03 l.y.)

A 1685 AB: 508; 525x: Good split, significant delta magnitude.  WDS uncertain, and there is no parallax data for the secondary.
20h 57m 41.41s +14° 01' 34.3" P.A. 86.00 sep 0.7 mag 10.13,10.39 Sp F8

HU 363 AB: 508; 300x: White stars, hairline split, near equal, nice pair.  WDS uncertain, but there is no parallax range overlap, -60%, it is not binary.
20h 58m 43.93s +18° 22' 42.0" P.A. 101.00 sep 0.8 mag 10.36,10.65 Sp A5

STT 424 AB: 508; 525x: ! White stars, significant delta magnitude, hairline split.  WDS grade 4 orbit, 1629-year period, but there is no parallax data for the primary.  
20h 59m 16.45s +15° 34' 21.8" P.A. 303.20 sep 0.5 mag 8.43,9.39 Sp A3 dist. 408.16 pc (1331.42 l.y.)

STF2750 A-BC: 508; 150x: Light yellow A and blue B, wide, 2 Dm.  Did not notice A 1690 BC, 0.4" pair I could have gotten.  WDS says A-BC proper motion indicates physical, but there is no parallax range overlap, it is not binary.
21h 05m 02.23s +12° 43' 20.5" P.A. 280.00 sep 16.0 mag 8.96,10.40 Sp K0 dist. 128.7 pc (419.82 l.y.)

HO 150 AB: 508; 150x: Tough, closely split, nearly 3 Dm.  WDS uncertain, and I don't find the Gaia data.

21h 07m 55.13s +18° 51' 01.3" P.A. 137.00 sep 2.8 mag 8.70,11.20 Sp F8