BU 159: AB: 178; 175x: Extremely fine hairline split and 3 delta mag, light orange A, with another wide component (STTA 215 AC). Burnham discovered with his 6-inch at 1.2", so it has tightened a little. There is no parallax data for the companion.
21h 10m 30.96s +47° 41' 32.0" P.A. 314.00 sep 1.1 mag 6.55,9.07 Sp B6IV dist. 423.73 pc (1382.21 l.y.)
BU 369 AB: 178; 175x: White A, the B star is at the edge of detectability with averted vision only. Discovered with the 6-inch at 10" it has since widened, and there are two even fainter components, not seen, which Burnham discovered later with the Lick 36-inch. WDS says physical, and this is probably true: 93% parallax overlap, 3,746 AU weighted separation, 2.56/0.90 solar mass.
21h 26m 29.08s +52° 44' 52.7" P.A. 31.00 sep 16.0 mag 7.59,11.80 Sp B9.5V dist. 198.81 pc (648.52 l.y.)
STF 2789 AB: 178; 175x: Well separated equal pair. WDS says physical with a 180 century period, and provides an orbit. 98% parallax range overlap, 565 AU weighted separation, 1.55/1.51 solar mass, and the delta radial velocity is less than the escape velocity, so that's a confirmed gravitational pair.
21h 19m 58.84s +52° 58' 44.1" P.A. 114.00 sep 6.9 mag 7.71,7.87 Sp F8V
21h 17m 50.98s +52° 28' 33.1" P.A. 305.00 sep 55.9 mag 7.66,11.11 Sp F2 dist. 106.72 pc (348.12 l.y.)
STF 2757 AB: 178; 175x: Lovely 2 delta mag, very closely split pair, ice blue A (spectral class B9.5V blue-white). WDS uncertain, and unfortunately there is no parallax range overlap, -26%.
21h 04m 34.72s +52° 23' 59.2" P.A. 264.00 sep 1.9 mag 7.82,9.24 Sp B9.5V dist. 227.79 pc (743.05 l.y.)
STF 2741 AB: 178; 175x: Light yellow A and light blue B, 1 delta mag, fairly bright so they shimmer in the seeing. WDS says physical, however there is no parallax range overlap, -13%, so it is not.
20h 58m 30.03s +50° 27' 42.4" P.A. 25.00 sep 2.0 mag 5.94,6.79 Sp B5Vn dist. 331.13 pc (1080.15 l.y.)
BU 155 AB: 178; 380x: Can tell it is not single ay 175x, and appears slightly notched at 245x. Strongly notched but not split at 380x. WDS physical with a 764-year period; unfortunately there is no parallax data for the companion. Burnham discovered with his 6-inch at 0.6" and notes "A fine pair, but no material change." He does not say whether he split it, though to do so would require a night of exceptional seeing to carry high magnification. Dembowski -- who had a 7-inch -- must also have had a good night to be able to put it under the wire for measurement. The thing about Burnham is he was a very attentive observer, I could imagine many others passing this over had they not studied the airy disk carefully.
20h 51m 05.41s +51° 25' 01.7" P.A. 39.50 sep 0.7 mag 7.36,8.13 Sp A9IV dist. 124.53 pc (406.22 l.y.)
20h 42m 16.81s +57° 23' 07.4" P.A. 81.50 sep 1.2 mag 7.21,8.80 Sp A4IV dist. 152.44 pc (497.26 l.y.)
20h 18m 24.76s +55° 23' 49.8" P.A. 337.00 sep 3.7 mag 6.01,7.51 Sp A2Vs dist. 90.5 pc (295.21 l.y.)
STF 2717 AB: 178; 175x: ! Light orange A and the tiniest fleck of a B star, finely split, >2 delta mag. Spectral class G3III (yellow). WDS uncertain, and very unfortunately there is no overlap in their parallax ranges, -26%, so not gravitationally bound.
20h 37m 48.12s +60° 45' 21.5" P.A. 259.00 sep 2.1 mag 7.34,9.46 Sp G3III dist. 263.16 pc (858.43 l.y.)
H I 48: 178; 245x: ! This was a surprise since most Herschel doubles are wide. Can tell is not single at 175x, and I get a near equal hairline split at 245x.
STF 2816 AC and STF 2829, double-double at the center of open cluster IC 1396. STF 2816 is the brighter pair and closer, 2 delta mag. STF 2829 is near equal and wider separation. Both are said to be physical.
21h 38m 57.61s +57° 29' 20.5" P.A. 121.00 sep 11.8 mag 5.73,7.48 Sp O6V+B1.5V dist. 606.06 pc (1976.97 l.y.)
21h 49m 23.85s +30° 45' 14.1" P.A. 15.00 sep 17.1 mag 8.91,9.66 Sp A0 dist. 125.79 pc (410.33 l.y.)
STF 2790 AB: 178; 175x: Light orange A with a very much fainter blue B, well separated. Spectral classes M1I+B2+B3 (red/blue-white). A is V381 Cep. WDS uncertain, and unfortunately there is no parallax overlap ranges.
21h 19m 15.69s +58° 37' 24.6" P.A. 45.00 sep 4.6 mag 5.85,9.27 Sp M1I+B2+B3 dist. 591.72 pc (1930.19 l.y.)
POP 1233 AC: 178; 175x: Near equal wide. AB is A 764, 8.23/10.69 1.0", not seen.
21h 22m 20.42s +57° 33' 54.6" P.A. 192.00 sep 83.6 mag 8.23,8.69 Sp G5+K0 dist. 96.43 pc (314.55 l.y.)
STF 2783 AB: 178; 175x: Challenging. Near equal white stars, elongated at lower powers, and I can get stronger notching with more magnification, until I had hairline split with seeing at 570x. 2.0" at discovery, so no problem for Struve! WDS gives physical with a 1760-year period. There is no parallax data for the primary, and the secondary is entirely missing.
21h 14m 04.90s +58° 17' 49.8" P.A. 349.40 sep 0.7 mag 7.71,8.07 Sp A3V dist. 127.88 pc (417.14 l.y.)
HJ 1791 AB: 178; 175x: Wide, 1 delta mag, light yellow A and blue B. Spectral class 0 (yellow). WDS physical, and this is correct: 43% parallax range overlap, 1,016 AU weighted separation, 1.33/0.83 solar mass, and the radial velocity delta is less than the escape velocity.
22h 35m 39.29s +56° 51' 40.2" P.A. 59.00 sep 17.1 mag 7.71,9.69 Sp G0
STT 480 AB: 178; 175x: Wide, <1 delta mag. N7380 nearby as a triangular mist of stars. WDS says physical, and this is likely correct: 10% parallax range overlap, 1,942 AU weighted separation, 1.36/1.08 solar mass, and the radial velocity delta 0.75 is less than the escape velocity (1.49).
22h 46m 05.29s +58° 04' 19.6" P.A. 116.00 sep 30.7 mag 7.65,8.64 Sp F8
STF 2953 AB: 178; 175x: White A and well separated, 2.5 delta mag blue B. WDS uncertain, though it is likely physical, 27% parallax range overlap, 3,199 AU weighted separation, 3.49/1.80 solar mass.
22h 52m 45.80s +60° 54' 58.6" P.A. 137.00 sep 8.5 mag 7.63,9.52 Sp A0V+G0III dist. 247.52 pc (807.41 l.y.)
STF 2950 AB: 178; 245x: Wonderful hair split with 175x, nice very clean at 245x. 2 delta mag, light yellow A and blue. WDS physical with a 817-year period, with 73% parallax range overlap, 102 AU weighted separation, 2.16/1.64 solar mass, for sure gravitationally bound. It will have a dramatic and rapid closure to periastron in the coming few years, down to 0.2", and one worth tracking.
22h 51m 22.51s +61° 41' 47.9" P.A. 271.10 sep 1.0 mag 6.03,7.08 Sp G8III-IV dist. 72.73 pc (237.25 l.y.)
23h 06m 28.56s +61° 26' 24.5" P.A. 355.00 sep 1.8 mag 6.80,10.33 Sp F5V dist. 112.99 pc (368.57 l.y.)
M52: Open cluster. A fine, irregular mist of stars with some brighter stars punctuating the shape.
STT 499 A-BC: 178; 175x: Fairly wide, 2 delta mag stars, yellow and blue. Spectral class G5 (yellow). BC is A 641 9.70/11.50 0.3". WDS physical, unfortunately no parallax data for the companion.
23h 33m 12.21s +57° 24' 28.5" P.A. 77.00 sep 9.7 mag 7.55,9.54 Sp G5 dist. 106.95 pc (348.87 l.y.)
STT 490 AB: 178; 175x: Very faint B swims into view with seeing, 2 delta mag to A. Very closely split. Very challenging. WDS uncertain, unfortunately there is no overlap in their parallax ranges, -48%.
23h 10m 09.51s +57° 26' 54.1" P.A. 298.00 sep 1.2 mag 7.22,9.15 Sp G3III-IV dist. 243.31 pc (793.68 l.y.)
HDS 3280 Aa,Ab / STT 485 AB: 178; 175x: A is obviously not round at 175x but does not resolve or notch up to 570x. B is faint and well split.
23h 02m 43.88s +55° 14' 10.9" P.A. 137.00 sep 0.6 mag 6.51,10.52 Sp B9III dist. 260.42 pc (849.49 l.y.) / WDS uncertain, and no data on the companion.
23h 02m 43.88s +55° 14' 10.9" P.A. 48.00 sep 18.8 mag 6.51,10.15 Sp B9III dist. 260.42 pc (849.49 l.y.) / WDS not physical and confirmed, no parallax range overlap -86%.
NGC 7662: Blue Snowball, planetary nebula. Fount, grey, with very faintly thicker ring, distinct edge.
STT 500 AB: 178; 175x: White A obviously not round at 175-245x, elongated at 380x. Physical with a 351-year period. No parallax data on the primary.
23h 37m 32.03s +44° 25' 44.5" P.A. 22.60 sep 0.4 mag 6.08,7.38 Sp B8V dist. 247.52 pc (807.41 l.y.)
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