The nice thing about the time change in the fall is it is dark much earlier, and there is more time to observe. Seeing was predicted to be above average, so I opened the 20-inch. Actual seeing was ok to good, but not great, though I did observe some challenging pairs, some down to 0.4" separation. I ended up switching back and forth between full and the 7-inch off-axis mask, depending on the conditions and difficulty. I liked how the mask makes the 20-inch a versatile scope, and maybe more worth to bring out to someplace like Fremont Peak for observing. I'll have to ponder that...
A 2100 AB: 508; 560x: Hairline split, PA to the southwest, white, 1 Dm. SOC grade 2 orbit, it will hang in the SW for the next 20 years without significant change.
23h 56m 47.29s +04° 43' 30.4" P.A. 252.00 sep 0.439 mag 7.40,7.90 Sp F0 dist. 111.98 pc (365.28 l.y.)
BU 6 178; 280x: 3 Dm B looks blue color, good close split. 84% PRO, 325 AU WS, 2.7+1.5 Msol, it is possibly binary and needs an orbit.
01h 44m 43.67s -06° 45' 58.2" P.A. 165.00 sep 2.2 mag 6.65,8.91 Sp G5III dist. 189.39 pc (617.79 l.y.)
BU 178 AB: 508; 635x: Near equal yellow, elongated only, barely a notch, PA north-south. SOC grade 3 orbit, it is 0.507" now and will close over the next 20 years to periastron. Burnham was correct in his assessment in the General Catalog: "The change, if any, is slow, but it can hardly fail to be a binary." He discovered it near apastron, and as can be seen from the orbit it does hang there for around 40 years before moving significantly.
22h 55m 10.96s -04° 59' 16.4" P.A. 324.00 sep 0.5 mag 6.03,7.75 Sp G4:III dist. 83.4 pc (272.05 l.y.)
BU 235 AB: 178; 500x: Very fine close split, near equal, Dawes limit! SOC grade 4 orbit, 278-year period. Unfortunately, there is no PRO (-61%), it is not binary.
01h 10m 34.31s +51° 00' 47.8" P.A. 142.00 sep 0.755 mag 7.54,7.82 Sp F5V dist. 104.6 pc (341.21 l.y.)
BU 258 AB: 178; 280x: Nice close split, needed >200x to separate the large delta pair. -72% PRO, it is not binary.
01h 13m 09.82s +61° 42' 22.3" P.A. 263.00 sep 1.6 mag 6.50,8.80 Sp B9V dist. 201.61 pc (657.65 l.y.)
BU 279 AB: 508; 200x: B is a very fine hard point just outside bright white A's swollen, spiky image. -40% PRO, it is not binary.
23h 42m 43.28s -14° 32' 41.1" P.A. 82.00 sep 5.3 mag 4.48,9.90 Sp B9.5V dist. 45.54 pc (148.55 l.y.)
BU 396 AB: 178; 280x: Very fine, 3 Dm B is just outside A's diffraction ring. Gaia lacks data for B, an orbit could be tried.
01h 03m 37.01s +61° 04' 29.4" P.A. 67.00 sep 1.3 mag 6.06,8.62 Sp F0II dist. 613.5 pc (2001.24 l.y.)
BU 852 BC, Aa-Ab: BC seen rather easily at 500x, faint and bluish but no mistaking two stars rather well split. Burnham discovered with 15.5-inch Washburn refractor. BC has a SOC grade 5 orbit, but there is no PRO, -43%, it is not binary. HDS 3301 Aa-Ab is much more difficult. With best seeing and highest magnification, Ab appears as a fleck off of bright A, in a PA that is slightly more than 100-degrees off the AB's PA. Very fine indeed. No Gaia data for Ab.
BC: 23h 10m 38.20s +26° 31' 35.6" P.A. 319.00 sep 1.3 mag 10.50,11.00
Aa-Ab: 23h 10m 42.40s +26° 31' 23.0" P.A. 160.00 sep 0.8 mag 7.21,10.91 Sp A7IV dist. 85.32 pc (278.31 l.y.)
BU 1093 AB: 508; 500x: Lovely close pair, 2 Dm. No Gaia data for B. SOC grade 4 orbit, 471-year period.
00h 20m 54.59s +10° 58' 36.8" P.A. 119.00 sep 0.8 mag 6.73,8.55 Sp A0V dist. 310.56 pc (1013.05 l.y.)
HDS3190 AB: 508; 200x: In choppy seeing, B appears as a fleck, fairly close to bright white A. No Gaia data for B.
22h 30m 38.82s -10° 40' 40.7" P.A. 10.00 sep 3.7 mag 4.81,8.47 Sp A0IVs dist. 88.81 pc (289.7 l.y.)
HJ 644 AB: 178; 150x: Wide group of three stars which forms a nearly right triangle. AB has 93% PRO, 3,076 AU WS, 2.7+0.9 Msol, so it might be binary. AC does not share parallax ranges.
01h 48m 40.61s +07° 41' 02.1" P.A. 279.00 sep 17.2 mag 7.18,11.70 Sp K0 dist. 172.41 pc (562.4 l.y.)
HJ 1088 AB: 178; 150x: 1 Dm, wide, white stars. -25% PRO, it is not binary.
01h 42m 17.70s +58° 37' 39.8" P.A. 168.00 sep 19.5 mag 6.34,9.79 Sp B7III+Am dist. 598.8 pc (1953.29 l.y.)
HJ 5394 AB: 508; 150x: Bright white, 3 Dm wide B. No Gaia data for B.
23h 19m 23.98s -05° 07' 27.7" P.A. 20.00 sep 11.0 mag 5.62,10.39 Sp F3V dist. 34.16 pc (111.43 l.y.)
S 398 AB: 178; 150x: 2 Dm super wide. -72% PRO, it is not binary.
01h 28m 22.92s +07° 57' 40.9" P.A. 100.00 sep 68.9 mag 6.34,8.02 Sp K1III dist. 114.55 pc (373.66 l.y.)
D 2 AB: 508; 560x: Exquisitely close split, nearly 1 Dm yellow stars, and a very wide third (STF 39 AB-C). No Gaia data for the primary, but a SOC grade 4 orbit, 777-year period. It should widen slightly to due east in the next 20 years.
00h 34m 29.79s -04° 32' 47.5" P.A. 76.00 sep 0.3 mag 7.63,8.04 Sp G0IV dist. 77.46 pc (252.67 l.y.)
STF 59 AB: 178; 200x: Well split, nearly 2 Dm. -27% PRO it is not binary.
00h 47m 59.03s +51° 26' 41.2" P.A. 149.00 sep 2.3 mag 7.24,8.06 Sp B9.5IV dist. 213.68 pc (697.02 l.y.)
STF 60 AB: 178; 250x: Light yellow A, 2 Dm orange B, very pretty pairing, seen with 150x but nicer and more colorful at higher power. 49% PRO, 77 AU WS, 1.1+0.5 Msol, it is likely binary. SOC grade 3 orbit, 479-year orbit.
00h 49m 06.29s +57° 48' 54.7" P.A. 327.00 sep 13.4 mag 3.52,7.36 Sp G1V+M dist. 5.95 pc (19.41 l.y.)
STF 65 AB: 178; 150x: Slightly unequal white stars, well split. 73% PRO, 656 AU WS, 2.2+2.2 Msol, and RVD 0.0 < EV 3.5, it is certainly binary and needs an orbit.
00h 52m 45.61s +68° 51' 59.3" P.A. 221.00 sep 3.2 mag 8.00,8.02 Sp A2 dist. 255.75 pc (834.26 l.y.)
STF 102 AB: 508; 500x: Light yellow unequal stars, nice clean split at high power, with other fainter stars nearby. 67% PRO but with 18% error, 2,377 AU WS, 2.6+1.8 Msol. It is likely binary but the parallax error is problematic, an orbit should be tried. The other nearby stars do not overlap parallax.
01h 17m 47.96s +49° 00' 30.5" P.A. 271.00 sep 0.5 mag 7.31,9.18 Sp B9.5V dist. 384.62 pc (1254.63 l.y.)
STF 113 A-BC: 178; 200x: Slightly unequal light yellow stars, close but easy split. -47% PRO, it is not binary, in spite of the SOC grade 4 orbit.
01h 19m 48.30s -00° 30' 32.5" P.A. 21.00 sep 1.6 mag 6.45,6.99 Sp A2V+G4III dist. 100.7 pc (328.48 l.y.)
STF 115 AB: 508; 500x: Near equal light-yellow stars, tight split. No Gaia data for the primary. SOC grade 3 orbit, 222-year period, it should widen a little more to the SE in the next 20 years.
01h 23m 21.27s +58° 08' 35.6" P.A. 156.00 sep 0.5 mag 7.10,7.30 Sp F5V dist. 58.82 pc (191.87 l.y.)
STF 120 AB: 178; 150x: Easy bright white and wide faint B. 58% PRO, 824 AU WS, 2.1+1.0 Msol, it is likely binary and needs an orbit.
01h 25m 00.59s -05° 56' 47.1" P.A. 278.00 sep 7.4 mag 6.83,10.00 Sp A0 dist. 112.36 pc (366.52 l.y.)
STF 136 AB: 178; 150x: White stars, 1 Dm, wide. -54% PRO, it is not binary.
01h 34m 51.61s +12° 33' 31.2" P.A. 77.00 sep 15.6 mag 7.33,8.33 Sp A6V dist. 231.48 pc (755.09 l.y.)
STF 138 AB: 178; 200x: Closely split near equal white stars. -25% PRO, it is not binary.
01h 36m 02.86s +07° 38' 42.9" P.A. 60.00 sep 1.7 mag 7.50,7.63 Sp F6V dist. 76.05 pc (248.08 l.y.)
STF 150 AB: 178; 150x: 2 Dm, wide seven. 7% PRO, 6,197 AU WS, 2.1+1.9 Msol, RVD 0.4 < EV 1.1, there is a small chance it's binary and an orbit should be tried.
01h 43m 22.43s -07° 04' 37.3" P.A. 196.00 sep 35.7 mag 7.73,8.19 Sp A
STF 317 AB: 152; 200x: Faint, fairly close, half delta magnitude. -76% PRO, it is not binary.
02h 58m 07.08s +69° 11' 35.8" P.A. 82.00 sep 4.0 mag 7.93,9.82 Sp F2 dist. 80.45 pc (262.43 l.y.)
STF2920 AB: 508; 150x: 1 Dm, pale white A and yellow B, well split. 31% PRO, 2,324 AU WS, 2.2+1.6 Msol, and RVD 1.1 < EV 1.7, it is possibly binary and needs an orbit.
22h 34m 31.58s +04° 13' 20.6" P.A. 144.00 sep 13.7 mag 7.55,8.85 Sp B9.5V dist. 89.13 pc (290.74 l.y.)
STF2935 AB: 508; 150x: Nice close split, white A and yellow B, 2 Dm. 15% PRO, 402 AU WS, 2.6+2.0 Msol, there is some chance it's binary and needs an orbit tried.
22h 43m 03.40s -08° 18' 41.2" P.A. 307.00 sep 2.4 mag 6.79,7.88 Sp A5V dist. 146.63 pc (478.31 l.y.)
STF2936 AB: 508; 150x: Pretty pair, fairly closely split, white A and light yellow B, nearly 2 Dm. -51% PRO, it is not binary.
22h 42m 58.09s +01° 13' 02.4" P.A. 50.00 sep 4.4 mag 7.04,9.60 Sp A6III dist. 144.93 pc (472.76 l.y.)
STF2939 AB: 508; 150x: White A, yellow B, 2 Dm, well split. -17% PRO, 1,168 AU WS, 1.8+0.9 Msol, and RVD 2.4 > EV 2.0, it is not binary.
22h 45m 20.80s -09° 38' 40.3" P.A. 63.00 sep 11.0 mag 7.44,9.30 Sp A4V dist. 84.25 pc (274.82 l.y.)
STF2944 AB: 508; 200x: Nice near equal, light-yellow stars, with a 2 Dm wide faint third. 34% PRO, 70 AU WS, 1.0+1.1 Msol, it is likely binary, and there is a SOC grade 4 orbit 603-year period.
22h 47m 50.05s -04° 13' 43.6" P.A. 309.00 sep 1.8 mag 7.30,7.68 Sp G2V+G4 dist. 32.03 pc (104.48 l.y.)
STF2958 AB: 508; 150x: White A and 1 Dm nicely split B, well seen with low power. 10% PRO, 341 AU WS, 2.0+1.1 Msol, RVD 2.1 < EV 4.0, it is possibly binary and needs an orbit tried.
22h 56m 51.47s +11° 50' 54.0" P.A. 15.00 sep 4.0 mag 6.63,9.09 Sp A3Vs dist. 98.81 pc (322.32 l.y.)
STF2968 AB: 508; 500x: 3 DM, wide around 3" separation. 8% PRO, 565 AU WS, 2.8+1.5 Msol, it is possibly binary and an orbit can be tried.
23h 00m 42.41s +31° 04' 58.7" P.A. 93.00 sep 3.2 mag 6.69,9.48 Sp B9pMn dist. 135.5 pc (442 l.y.)
STF2986 AB: 508; 150x: White A and wide 2 Dm B. 46% PRO, 789 AU WS, 1.1+0.5 Msol, but RBD 2.6 > EV 1.9, it is not binary.
23h 09m 57.10s +14° 25' 35.6" P.A. 269.00 sep 31.4 mag 6.61,8.88 Sp G0V dist. 24.83 pc (81 l.y.)
STF2995 AB: 508; 150x: Near equal white stars, like headlights. 88% PRO, 291 AU WS, 1.1+1.0 Msol, and RVD 0.3 < EV 3.6, it is likely binary and needs an orbit.
23h 16m 35.24s -01° 35' 11.4" P.A. 32.00 sep 5.3 mag 8.20,8.61 Sp G5 dist. 64.68 pc (210.99 l.y.)
STF3007 AB: 508; 150x: White A and light orange well split B. 38% PRO, 226 AU WS, 1.3+0.7 Msol, it is likely binary and needs an orbit.
23h 22m 48.67s +20° 33' 32.2" P.A. 92.00 sep 5.9 mag 6.74,9.78 Sp G2V+dK6 dist. 37.38 pc (121.93 l.y.)
STF3009 AB: 508; 150x: Light-yellow A and 2 DM well split B. 26% PRO, 1,678 AU WS, 3.5+1.8 Msol, it is possibly binary and needs an orbit.
23h 24m 16.47s +03° 42' 56.1" P.A. 230.00 sep 7.1 mag 6.87,8.76 Sp K2III dist. 223.71 pc (729.74 l.y.)
STF3023 AB: 508; 250x: White A and two delta, fairly closely split B. -18% PRO, it is not binary.
23h 32m 24.68s +17° 24' 15.1" P.A. 280.00 sep 1.8 mag 7.23,9.11 Sp F4IV dist. 153.14 pc (499.54 l.y.)
STF3031 AB: 508; 150x: Near equal, wide. 54% PRO, 708 AU WS, 1.2+1.0 Msol, and RVD 0.7 < EV 2.3. It is likely binary and needs an orbit.
23h 41m 11.47s +06° 15' 46.0" P.A. 311.00 sep 13.9 mag 7.80,8.58 Sp F8
STF3044 AB: 508; 150x: Wide, white unequal stars. 24% PRO, 1,841 AU WS, 1.8+1.5 Msol, and RVD 0.5 < EV 1.8, it is likely binary and needs an orbit.
23h 52m 59.94s +11° 55' 27.4" P.A. 283.00 sep 18.7 mag 7.27,7.91 Sp F0 dist. 139.47 pc (454.95 l.y.)
STF3045 AB: 508; 150x: 1 Dm, nicely separated. -34% PRO, it is not binary.
23h 54m 25.44s +02° 27' 50.0" P.A. 272.00 sep 1.8 mag 7.97,9.31 Sp A2 dist. 201.61 pc (657.65 l.y.)
STF3055 AB: 508; 150x: White A and 3 Dm well separated B. 76% PRO, 1,076 AU WS, 2.5+1.2 Msol, it is possibly binary and needs an orbit.
00h 04m 00.24s +12° 08' 45.0" P.A. 359.00 sep 5.7 mag 7.28,10.34 Sp F0III dist. 176.37 pc (575.32 l.y.)
STFB 12 A-BC: 508; 150x: Very wide, at least 4 Dm. No Gaia data for BC. Did not try for BU 1220 BC 10.5/10.7 0.4", which is a short period pair but closing to periastron and impossible for the next 30 years.
23h 15m 53.50s -09° 05' 15.9" P.A. 312.00 sep 48.9 mag 4.36,9.88 Sp K1III dist. 45.93 pc (149.82 l.y.)
STT 20 AB: 508; 500x: Slightly unequal white stars, closely split. No Gaia data for the primary. SOC grade 3 orbit, 343-year period, it will not move much over the next 20 years.
00h 54m 35.22s +19° 11' 18.4" P.A. 176.00 sep 0.6 mag 6.12,7.19 Sp A0V dist. 108.11 pc (352.65 l.y.)
STT 23 AB: 178; 150x: Easy white stars, wide, near equal. -70% PRO, it is not binary.
01h 10m 07.56s +51° 44' 48.2" P.A. 191.00 sep 14.5 mag 8.14,8.59 Sp F8 dist. 70.87 pc (231.18 l.y.)
STT 31 AB: 178; 200x: Fine faint B well separated from A. -39% PRO, it is not binary.
01h 33m 18.28s +08° 12' 31.5" P.A. 78.00 sep 3.9 mag 6.46,10.56 Sp K0III dist. 147.93 pc (482.55 l.y.)
STT 491 A-BC: 178; 150x: Very wide, 3 Dm. 16% PRO with BC, 9,051 AU WS, 1.7+0.8 Msol, likely binary and needs an orbit. A 2299 BC is likely binary, 47% PRO, 94 AU WS, 0.8+0.7 Msol, it needs an orbit.
23h 13m 41.04s +02° 12' 12.8" P.A. 319.00 sep 118.4 mag 7.22,10.91 Sp F2 dist. 88.26 pc (287.9 l.y.)
STT 503 AB: 508; 250x: Finely split near equal white stars. 4% PRO, 127 AU WS, 1.6+1.5 Msol, it is possible to be binary and an orbit should be tried.
23h 42m 02.13s +20° 17' 47.3" P.A. 134.00 sep 1.0 mag 8.26,8.63 Sp F8 dist. 108.46 pc (353.8 l.y.)
STT 504 AB: 508; 150x: 2 Dm, wide. -23% PRO, it is not binary.
23h 42m 31.33s +18° 39' 59.3" P.A. 176.00 sep 7.7 mag 7.39,10.33 Sp K0 dist. 202.02 pc (658.99 l.y.)
STT 505 AB: 508; 200x: Split with low power but better seen medium (appear more widely separated so as not to be in each other's glare. Light yellow and 2 Dm. 36% PRO, 343 AU WS, 2.7+1.3 Msol, it is possibly binary and needs an orbit.
23h 45m 29.33s +20° 24' 55.6" P.A. 60.00 sep 2.4 mag 6.75,9.61 Sp G8III dist. 159.24 pc (519.44 l.y.)
STT 515 AB: 508; 500x: Using a blue filter and apodising mask to suppress the bright stars, split with PA to east, at least 1 Dm, difficult because of diffraction and seeing effects. No Gaia data. SOC grade 4 orbit, 554-year period.
01h 09m 30.12s +47° 14' 30.6" P.A. 114.00 sep 0.5 mag 4.59,5.61 Sp B7Ve dist. 219.78 pc (716.92 l.y.)
STTA 31 AB: 60; 40x: 1 Dm, super wide. 9% PRO, 18,368 AU WS, 2.8+2.4 Msol. Weighted separation is far too large to be binary.
03h 00m 53.78s +59° 39' 57.4" P.A. 231.00 sep 73.9 mag 7.33,8.03 Sp B9p dist. 241.55 pc (787.94 l.y.)
STTA241 AB: 178; 150x: Wide, 1 Dm. -84% PRO, it is not binary.
22h 58m 33.60s +12° 03' 04.4" P.A. 160.00 sep 84.9 mag 8.28,8.37 Sp F2 dist. 111.48 pc (363.65 l.y.)