Quite the night on the 6-inch refractor. Transparency hurt by the typical winter haze, but at least it did not dew over. The seeing was quite good, constantly improving through the night. I wasted some time dealing with alignment issues, but even with that I recorded more than 50 observations before closing up at 11:30pm. Also had views of Jupiter, Rigel (BC, hinted at with high power), the Orion nebula, and Mars -- where I could see some dark markings and a polar ice cap, but little else.
02h 47m 03.60s +35° 33' 17.3" P.A. 217.00 sep 0.9 mag 6.42,8.64 Sp F0IV dist. 50.61 pc (165.09 l.y.)
BU 87 AB: 152; 250x: Light orange star, with seeing very faint B appears as a solid point of light just outside of A's diffraction ring. -9% PRO with 3.5% error, 981 AU WS, 6.6+3.1 Msol, it is not likely to be binary. Burnham noted the color as "A fine colored pair, J gives golden:blue" but also "the components are evidentially fixed"
04h 22m 22.74s +20° 49' 16.4" P.A. 168.00 sep 1.9 mag 6.21,8.60 Sp B3V+K3II dist. 714.29 pc (2330.01 l.y.)
BU 310 AB: 152; 200x: Wide B seen with averted vision. -21% PRO, it is not binary. Burnham himself called it "fixed."
04h 22m 00.26s +39° 56' 03.3" P.A. 173.00 sep 18.9 mag 7.10,12.62 Sp F8 dist. 54.56 pc (177.97 l.y.)
BU 533 AB: 152; 250x: Just split with 250x, slightly unequal. -12% PRO 1% error, 103 AU WS, 1.6+1.7 Msol, it is not likely binary -- in spite of the SOC grade 4 orbit of 463-years.
03h 35m 37.81s +31° 40' 48.7" P.A. 221.00 sep 1.0 mag 7.55,7.74 Sp F4V dist. 85.98 pc (280.47 l.y.)
BU 535 AB: 152; 250x: Difficult, with seeing, a solid form steady on A's diffraction ring, high power only. No Gaia data for B.
03h 44m 19.13s +32° 17' 17.7" P.A. 21.00 sep 1.0 mag 3.91,6.70 Sp B1III dist. 343.64 pc (1120.95 l.y.)
BU 547 AB: 152; 250x: At best moments of seeing only, light yellow-orange A and B at A's diffraction ring. No Gaia data for B. It would be worth to try an orbit.
04h 13m 56.39s +09° 15' 50.0" P.A. 339.00 sep 1.3 mag 5.05,7.32 Sp G5IV+A8V dist. 101.73 pc (331.84 l.y.)
BU 548 AB: 152; 200x: Wide B with averted vision only. -1% PRO with 0.5% error, 1,406 AU WS, 2.6+1.0 Msol, RVD 3.5 > EV 2.1, it is not binary. Burnham noted "No material change."
04h 16m 35.98s -10° 05' 08.8" P.A. 345.00 sep 6.2 mag 7.50,11.39 Sp A3III dist. 254.45 pc (830.02 l.y.)
ES 558 AB: 152; 150x: Faint B well separated. -20% PRO, it is not binary.
03h 06m 47.76s +45° 45' 02.8" sep 8.4 mag 7.65,10.62 Sp B9 dist. 170.36 pc (555.71 l.y.)
HU 544 AB: 152; 250x: Exquisite light blue stars, closely separated at 150x, best seen 250x, almost 2 Dm. Really pretty. -49% PRO, it is not binary! In spite of SOC grade 5 orbit.
03h 15m 48.70s +50° 57' 21.2" P.A. 103.00 sep 1.7 mag 6.72,8.20 Sp A0 dist. 134.95 pc (440.21 l.y.)
KUI 15 AB: 152; 250x: Excellent close pair, hairline split, unequal. No Gaia parallax data for B. SOC grade 4 orbit, 871-year period.
03h 52m 00.23s +06° 32' 05.6" P.A. 206.00 sep 0.8 mag 6.26,6.56 Sp B5V dist. 238.66 pc (778.51 l.y.)
LDS5535 AB: 152; 125x: Super-wide, 4 Dm. -90% PRO, it is not binary.
04h 17m 15.69s +20° 34' 43.5" P.A. 299.00 sep 180.7 mag 4.95,9.63 Sp A3 dist. 28.94 pc (94.4 l.y.)
STF 301 AB: 152; 150x: Easy, wide, 1 Dm, also seen with the 60-mm scope and 40x. -30% PRO, it is not binary.
02h 47m 38.75s +53° 56' 35.8" P.A. 17.00 sep 8.2 mag 7.85,8.70 Sp A0 dist. 990.1 pc (3229.71 l.y.)
STF 307 AB: 152; 150x: The primary is a beautiful light orange color, with many stars around, including wide 4 Dm B. AC also seen with averted version at first but can then hold, more than twice as wide but with a similar PA. AB -4% PRO but with 5.7% error, but weighted separation is 8,180 AU, likely too far even with the 8.2+2.3 Msol. AC do not share parallax at all.
02h 50m 41.81s +55° 53' 43.8" P.A. 301.00 sep 28.7 mag 3.76,8.50 Sp M3I+B9V dist. 269.54 pc (879.24 l.y.)
STF 336 AB: 152; 150x: Light yellow A and wide blue B, closely separated at low power. -35% PRO, it is not binary.
03h 01m 29.07s +32° 24' 45.8" P.A. 8.00 sep 8.7 mag 6.96,8.27 Sp G5IV dist. 168.07 pc (548.24 l.y.)
STF 337 AB: 152; 150x: Unequal wide. 81% PRO, 1,110 AU WS, 1.3+0.8 Msol, and RVD 1.5 < EV 1.8, it is likely binary and needs an orbit.
03h 02m 16.79s +41° 23' 45.7" P.A. 163.00 sep 17.6 mag 7.99,9.34 Sp F5 dist. 47.8 pc (155.92 l.y.)
STF 352 AB: 152; 150x: 2 Dm, well separated. 64% PRO, 514 AU WS, 1.9+1.1 Msol, and RVD 1.6 < EV 3.2, it is likely binary and needs an orbit.
03h 08m 45.91s +35° 27' 31.1" sep 3.9 mag 7.80,9.65 Sp A0 dist. 155.52 pc (507.31 l.y.)
STF 360 AB: 152; 150x: Lovely closely split 1 Dm white stars, with low power. -9% PRO with 2.5% error, 130 AU WS, 1.1+1.0 Msol, RVD 0.0 < EV 5.4. SOC grade 4 orbit 1500-year period -- only time will tell whether it bears out being binary, but chances are reduced given the parallax.
03h 12m 09.59s +37° 13' 03.3" P.A. 124.00 sep 3.0 mag 8.02,8.29 Sp G0 dist. 39.92 pc (130.22 l.y.)
STF 375 AB: 200x: Close, but still easy split with 150x, better seen 200x, 2 Dm. -34% PRO, it is not binary. AC and AB-D do not share parallax and are not binary either.
03h 20m 21.23s +23° 41' 21.9" P.A. 316.00 sep 2.7 mag 7.62,9.90 Sp A7IV dist. 104.6 pc (341.21 l.y.)
STF 376 AB: 152; 150x: Equal wide. 62% PRO, 1,485 AU WS, and RVD 0.0 < EV 2.2, it is likely binary and needs an orbit.
03h 20m 20.64s +19° 43' 49.3" P.A. 251.00 sep 7.2 mag 8.33,8.44 Sp A2V dist. 123.15 pc (401.72 l.y.)
STF 381 AB: 152; 250x: 2 Dm very closely split, seen with low power but best with 250x. No Gaia data for the secondary, but because the primary is roughly 554 light years distant, it is unlikely it is binary.
03h 23m 19.33s +20° 58' 13.9" P.A. 109.00 sep 1.1 mag 7.56,8.75 Sp G5
STF 408 AB: 152; 250x: Near equal, just barely split with 250x. No Gaia parallax for the secondary. The primary is roughly 396 light years distant, so it is possible to be binary, and an orbit should be tried.
03h 30m 39.31s -04° 16' 23.5" P.A. 320.00 sep 1.1 mag 8.23,8.41 Sp A3 dist. 113.12 pc (369 l.y.)
STF 422 AB: 152; 150x: Light yellow stars, 2 Dm, well separated. -23% PRO, it is not binary, in spite of the SOC grade 4 orbit 1210-year period.
03h 36m 47.30s +00° 35' 15.9" P.A. 273.00 sep 6.7 mag 6.00,8.90 Sp G8V+K6 dist. 30.68 pc (100.08 l.y.)
STF 427 AB: 152; 150x: Unequal, wide, white. -61% PRO, it is not binary.
03h 40m 38.77s +28° 46' 24.0" P.A. 207.00 sep 7.0 mag 7.41,7.84 Sp A1V+A2V dist. 113.12 pc (369 l.y.)
STF 435 AB: 152; 150x: 2 Dm, wide. 0% PRO, it is not binary.
03h 43m 06.52s +25° 40' 52.9" P.A. 3.00 sep 13.2 mag 7.20,8.87 Sp F3V
STF 444 AB: 152; 150x: 3 Dm, well split, unequal. 68% PRO, 485 AU WS, 2.3+1.1 Msol, and RVD 2.5 < EV 3.5, it is likely binary and needs an orbit.
03h 45m 48.82s +23° 08' 49.7" P.A. 338.00 sep 3.4 mag 6.91,10.09 Sp A0V dist. 121.36 pc (395.88 l.y.)
STF 460 AB: 152; 250x: Strongly notched snowman, 1 Dm, illusion of hairline split but I think it's just the appearance of two photocenters. No Gaia data. SOC grade 3 orbit 372-year period, nearly circular, little change in the next 25 years. Current separation 0.662", below my resolution limit.
04h 10m 02.74s +80° 41' 55.2" P.A. 154.00 sep 0.662 mag 5.62,6.32 Sp G8III+A4V dist. 116.41 pc (379.73 l.y.)
STF 469 AB: 152; 150x: Well separated, 3 Dm, white. 68% PRO, 1,133 AU WS, 2.2+1.1 Msol, but RVD 2.4 > EV 2.3. It just might be binary, an orbit should be tried.
03h 57m 16.29s +41° 52' 50.3" P.A. 146.00 sep 9.1 mag 6.90,9.92 Sp A2 dist. 121.07 pc (394.93 l.y.)
STF 470 AB: 152; 200x: Gorgeous colors, light orange A and light blue B, 1 Dm, wide. Pretty at all powers. 0% PRO, it isn't binary.
03h 54m 17.49s -02° 57' 17.0" P.A. 349.00 sep 6.9 mag 4.80,5.89 Sp G8III+A2V dist. 95.97 pc (313.05 l.y.)
STF 471 AB: 152; 150x: Very bright A, well separated 5 Dm B. -10% PRO with 8% error, it is not binary.
03h 57m 51.22s +40° 00' 36.9" P.A. 12.00 sep 8.8 mag 2.85,8.88 Sp B0.5V+A2V dist. 195.69 pc (638.34 l.y.)
STF 483 AB: 152; 250x: Very closely split, 2 Dm. -46% PRO, it is not binary.
04h 04m 07.10s +39° 30' 35.0" P.A. 53.00 sep 1.6 mag 7.38,9.35 Sp G5 dist. 32.36 pc (105.56 l.y.)
STF 494 AB: 152; 150x: Equal white stars, well separated. 52% PRO, 595 AU WS, 1.8+1.8 Msol, and RVD 0.1 < EV 3.3, it is certainly binary and needs an orbit.
04h 08m 53.50s +23° 05' 55.1" P.A. 187.00 sep 5.5 mag 7.53,7.65 Sp A8IV+A8IV dist. 104.71 pc (341.56 l.y.)
STF 495 AB: 152; 150x: Well split, 2 Dm. -54% PRO, it is not binary.
04h 07m 41.98s +15° 09' 46.1" P.A. 222.00 sep 3.6 mag 6.11,8.77 Sp F3V dist. 43.63 pc (142.32 l.y.)
STF 510 AB: 152; 150x: Well separated, 3 Dm. -72% PRO, it is not binary.
04h 12m 09.28s +00° 44' 08.1" P.A. 303.00 sep 10.4 mag 6.67,10.05 Sp G8III dist. 145.56 pc (474.82 l.y.)
STF 516 AB: 152: 150x: Pretty light orange A and 3 Dm blue B, well separated. 11% PRO, 450 AU WS, 2.8+1.1 Msol, but RVD 4.2 > EV 3.9, it is not binary.
04h 14m 23.69s -10° 15' 21.2" P.A. 143.00 sep 6.4 mag 5.03,8.53 Sp K2III dist. 74.29 pc (242.33 l.y.)
STF 517 AB: 152; 150x: 2 Dm, well separated. -16% PRO, it is not binary.
04h 16m 01.44s +00° 27' 13.9" P.A. 7.00 sep 3.2 mag 7.39,9.26 Sp A1V dist. 116.69 pc (380.64 l.y.)
STF 518 BC: 152; 200x: A is light orange, with a widely separated B. But BC is the prize, more closely split, both faint, C appears best with averted vision. -27% PRO, it is not binary, though there is a SOC grade 3 orbit 233-year period. More time is needed for this one to sort out.
04h 15m 21.79s -07° 39' 29.1" P.A. 330.00 sep 8.2 mag 9.53,11.17 Sp DA2.9+M5V
STF 521 AB: 152; 200x: Pale white stars, 1 Dm, easy split. -34% PRO, it is not split.
04h 21m 45.39s +50° 02' 06.5" P.A. 257.00 sep 2.1 mag 7.44,9.17 Sp G0 dist. 813.01 pc (2652.04 l.y.)
STF 531 AB: 152; 250x: Difficult with this aperture, <1" split, significant delta. Just split at best moments of seeing. 87% PRO, 160 AU WS, 2.2+1.7 Msol, it is likely binary. SOC grade 5 orbit, 1107-year period.
04h 26m 46.23s +55° 38' 37.6" P.A. 325.00 sep 1.0 mag 7.69,8.76 Sp F4IV dist. 158.73 pc (517.78 l.y.)
STF 533 AB: 152; 150x: Very wide, 1 Dm, ordinary. 0% PRO with 3.2% error, and with 4,242 AU WS, 2.6+2.0 Msol, it is not likely binary.
04h 24m 24.85s +34° 18' 53.1" P.A. 62.00 sep 19.0 mag 7.30,8.49 Sp B8V dist. 221.73 pc (723.28 l.y.)
STF 534 AB: 152; 150x: Very wide, nearly 2 Dm, ordinary. 26% PRO, 6,153 AU WS, 3.3+2.2 Msol, it is possible to be binary and an orbit should be tried.
04h 23m 59.76s +24° 18' 03.7" P.A. 291.00 sep 29.1 mag 6.36,7.94 Sp B3V+A1V dist. 278.55 pc (908.63 l.y.)
STF 535 AB: 152; 250x: Exceptionally close split, light blue stars, 1 Dm, with high power and best seeing. No Gaia data for the secondary. SOC grade 4 orbit, 532-year period.
04h 23m 16.84s +11° 22' 40.5" P.A. 267.00 sep 1.1 mag 6.95,8.29 Sp A5III dist. 87.26 pc (284.64 l.y.)
STF 536 AB: 152; 200x: Unequal, closely separated. -70% PRO, it is not binary.
04h 22m 10.21s -04° 40' 37.4" P.A. 193.00 sep 1.6 mag 7.94,8.73 Sp A7IV dist. 142.05 pc (463.37 l.y.)
STF 545 AB: 152; 150x: Wide, white, 2 Dm. -65% PRO, it is not binary.
04h 27m 04.85s +18° 12' 27.1" P.A. 58.00 sep 19.0 mag 6.92,8.78 Sp A0V dist. 106.5 pc (347.4 l.y.)
STF 546 AB: 152; 150x: Unequal, well split. 30% PRO, 440 AU WS, 1.3+0.9 Msol, and RVD 1.5 < EV 3.0, it is likely binary and needs an orbit.
04h 27m 00.62s +19° 07' 03.6" P.A. 182.00 sep 7.0 mag 7.94,9.21 Sp G0 dist. 65.02 pc (212.1 l.y.)
STF3114 AB: 152; 150x: 2 Dm, nice close split. 47% PRO, 208 AU WS, 1.4+0.8, it is likely binary and needs an orbit.
04h 09m 10.26s +40° 09' 40.5" P.A. 157.00 sep 3.1 mag 7.71,9.59 Sp F8V dist. 61.35 pc (200.12 l.y.)
STT 44 AB: 152; 250x: Very close split 1 Dm, in the middle of M34. -5% PRO with 2.2% error, not likely binary.
02h 42m 13.13s +42° 41' 57.2" P.A. 56.00 sep 1.4 mag 8.46,8.96 Sp B9Vp dist. 248.14 pc (809.43 l.y.)
STT 46 AB: 152; 250x: Faint, close companion is cleanly split, perfect star images with high power. 25% PRO, 302 AU WS, and RVD 3.2 < EV 3.7, it is likely binary and needs an orbit.
02h 50m 00.31s +30° 31' 34.8" P.A. 75.00 sep 4.8 mag 6.78,10.79 Sp F0 dist. 62.42 pc (203.61 l.y.)
STT 64 AB: 152; 250x: Nice close split, 3 Dm. C is nearly the same position angle and magnitude as B, but three times as widely separated. AB 47% PRO, 447 AU WS, 2.3+1.1 Msol, likely binary and needs an orbit. C has a similar parallax but not overlapping with A or B.
03h 49m 58.06s +23° 50' 55.3" P.A. 234.00 sep 3.3 mag 6.81,10.15 Sp B9.5Vp dist. 146.84 pc (478.99 l.y.)
STT 69 AB: 152; 200x: 2 Dm, very closely split, B sits on A's diffraction ring. -67% PRO, it is not binary.
03h 59m 39.97s +38° 49' 13.4" P.A. 323.00 sep 1.4 mag 6.60,9.13 Sp A1Vp: dist. 193.8 pc (632.18 l.y.)
STT 72 AB: 152; 150x: Light orange stars, well separated, >3 Dm. 18% PRO, 638 AU WS, 3.3+1.2 Msol, there is some possibility it is binary, an orbit should be tried.
04h 07m 59.42s +17° 20' 23.6" P.A. 327.00 sep 4.8 mag 6.10,9.71 Sp K5IIIb dist. 123.15 pc (401.72 l.y.)
STT 73 AB: 152; 150x: Light orange A, faint wide B. -18% PRO, it is not binary.
04h 14m 53.86s +48° 24' 33.5" P.A. 349.00 sep 15.0 mag 4.24,10.28 Sp G0Ib dist. 276.24 pc (901.09 l.y.)
STT 81 AB: 152; 150x: Close split with low power, 1 Dm. -57% PRO, it is not binary.
04h 24m 37.46s +33° 57' 34.9" P.A. 13.00 sep 4.2 mag 5.84,9.25 Sp F4V dist. 40.62 pc (132.5 l.y.)
STT 82 AB: 152; 250x: Very closely split, 1 Dm. -38% PRO, it is not binary -- interesting there is a SOC grade 3 orbit, 247-year period.
04h 22m 44.10s +15° 03' 22.1" P.A. 323.00 sep 1.2 mag 7.31,8.63 Sp F9V dist. 43.63 pc (142.32 l.y.)
STT 531 AB: 152; 250x: Well separated at higher powers, 2 Dm. No Gaia parallax data. SOC grade 5 orbit, 590-year period, so it's anyone's guess.
04h 07m 34.35s +38° 04' 28.3" P.A. 353.00 sep 2.7 mag 7.32,9.69 Sp K1V dist. 20.38 pc (66.48 l.y.)
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