11 november 2026, burnhams with the 6-inch

Had a brief session with the 6-inch.  It was clear but with some haze, through fortunately it didn't dew.  Seeing was average 6/10.  Continued with some Burnhams, including some at lower elevation with pretty good results despite the conditions.

Vizier is down so will come back to this later to calculate the binarity. 

BU 9 AB: 152; 380x: Very delicate B, much fainter, very closely split, seen with 225x but better separated with 380x. Burnham discovered at 1.5", so much easier for him, though I think he likely used higher magnification.  Burnham didn't notice any proper motion or movement of the secondary, but there is a SOC grade 5 orbit 616-year period.

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 10 AB: 152; 225x: White A and B a tiny faint point beyond A's diffraction ring, with seeing.  Burnham noted no change.  

02h 50m 21.46s -04° 59' 11.1" P.A. 100.00 sep 2.9 mag 7.20,10.44 Sp A0 dist. 134.59 pc (439.03 l.y.)

BU 11 AB: 152; 380x: Very faint B seen persistently just beyond A's diffraction.  Burnham noted no change.  

03h 02m 42.26s -07° 41' 07.7" P.A. 63.00 sep 1.4 mag 5.40,8.90 Sp K0II-III dist. 81.17 pc (264.78 l.y.)

BU 12 AB: 152; 225x: Faint pair, B 2 Dm and closely split.  Burnham noted no change.

03h 24m 24.60s -13° 59' 34.6" P.A. 281.00 sep 2.3 mag 7.02,9.13 Sp A2V dist. 197.24 pc (643.4 l.y.)

BU 84 AB: 152; 380x: Slight elongation with best seeing only, with 225x and 380x.  Burnham didn't indicate any change.

03h 16m 00.86s -05° 55' 07.3" P.A. 6.00 sep 1.0 mag 6.38,7.93 Sp B9V dist. 201.61 pc (657.65 l.y.)

BU 262 AB: 152; 225x: Very fine reddish B wrapped in combined diffraction rings with A, nicely split, more than one delta.  Discovered with the Dartmouth 9.4-inch, Burnham noted little change.

02h 47m 45.15s +31° 03' 10.6" P.A. 50.00 sep 1.7 mag 8.24,9.89 Sp G0 dist. 178.57 pc (582.5 l.y.)

BU 401 AB: 152; 125x: Well split very faint B.  Burnham said evidently fixed.  

03h 50m 16.10s -01° 31' 21.5" P.A. 253.00 sep 4.6 mag 6.54,10.51 Sp F2 dist. 43.67 pc (142.45 l.y.)

BU 403 AB: 152; 225x: Faint B fairly well split, need averted vision.  Burnham says unchanged.

04h 25m 41.85s -02° 13' 56.8" P.A. 80.00 sep 0.8 mag 7.47,9.42 Sp F8 dist. 42.74 pc (139.42 l.y.)

BU 547 AB: 152; 380x: Needed high magnification to resolve blue B to light yellow A, sitting outside edge of A's diffraction. Burnham discovered with the 18.5-inch, and notes slow but consistent similar proper motion.

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.)