15 april 2021

I was able to get out the last couple of nights for double star observing.  Seeing was variable so I was masking up and down.  Last night the two or three day old moon was high enough to be visible, so I observed some craters with unfamiliar lighting and the earth-shine illuminated dark area, and also watch the moon occult a few bright stars (in Taurus).  Some pretty good double seen, though marine haze continues to limit how faint I can go.

COU 287 AB: 508; 205x: Near equal, light orange, split about 1".  
10h 10m 58.48s +18° 33' 58.6" P.A. 95.00 sep 1.4 mag 10.52,10.77 Sp K0 dist. 103.09 pc (336.28 l.y.)

BU 1321 AB: 508; 205x: White A and very faint B which I can just hold with direct vision, ~3", it brightens with averted vision.
10h 22m 03.20s +12° 25' 42.0" P.A. 130.00 sep 1.8 mag 9.60,12.50 Sp G0

STF1435 AB: 508; 205x: Faint for a Struve, but easy white stars, wide, about half a delta mag.  Physical.
10h 27m 57.15s +19° 49' 44.7" P.A. 203.00 sep 8.5 mag 10.33,10.73 Sp G0

STF1518 BC: 508; 205x: A is light orange color, wide BC appears as a smear with the 7-inch mask but is a well split pair of near equal blue stars with 20-inches, ~3".  Nice pair
11h 14m 22.54s +05° 15' 25.4" P.A. 354.00 sep 3.5 mag 11.26,11.50

STF1522 AB: 508; 205x: Fine pair, blue-white A and ~3 delta mag faint B, ~3"
11h 16m 07.34s +01° 35' 12.1" P.A. 175.00 sep 2.5 mag 9.00,11.00 Sp F8

STF1529 AB: 508; 205x: Easy bright yellow ~1 delta wide
11h 19m 22.64s -01° 39' 17.6" P.A. 254.00 sep 9.3 mag 7.10,7.91 Sp F6IV+dG3 dist. 48.12 pc (156.97 l.y.)

BU 791 AB: 508; 205x: Very attractive dull white and light blue companion, ~2 delta and ~2".  Burnham discovered with 15-inch.
11h 19m 39.07s +06° 51' 49.3" P.A. 204.00 sep 2.0 mag 9.63,11.72 Sp G5

BU 340 AB: 178; 205x: Very nice, ~4", dull white and three delta blue B, just a tiny point.
11h 29m 58.80s +03° 12' 18.2" P.A. 11.00 sep 4.4 mag 8.38,11.02 Sp F8 dist. 86.51 pc (282.2 l.y.)

HO 51 AB: 178; 205x: Extremely faint B appears after foveal coaxing, ~4" from white A.  Physical
11h 31m 39.92s +07° 51' 48.8" P.A. 174.00 sep 3.1 mag 7.93,11.49 Sp K0 dist. 114.94 pc (374.93 l.y.)

STF1549 AB: 178; 205x: Faint for a Struve, but easy wide one delta.  Physical
11h 32m 37.03s +24° 19' 23.2" P.A. 113.00 sep 12.8 mag 9.49,11.16 Sp K0

BU 917 AB: 508; 205x: A has an intense light blue color, with very faint B ~4".  Very nice pair.  I can't see b with 7-inch mask.  Physical.  Burnham discovered with 18.5-inch.
11h 43m 35.12s +10° 41' 40.4" P.A. 176.00 sep 4.1 mag 8.70,11.59 Sp A5 dist. 136.8 pc (446.24 l.y.)

STF1500 AB: 178; 205x: Very fine white stars, ~1 delta, ~1.5".  Physical with a 680-year period.
11h 00m 02.02s -03° 28' 16.5" P.A. 298.90 sep 1.3 mag 7.91,8.27 Sp F8V dist. 53.59 pc (174.81 l.y.)

AG 173 AB: 178; 205x: Faint pair, rather difficult given the poor transparency, white, ~1 delta mag, ~2-3".
11h 00m 32.39s +02° 58' 09.2" P.A. 127.00 sep 2.2 mag 9.92,10.54 Sp G5 dist. 118.06 pc (385.11 l.y.)

KUI 54 AB: 178; 205x: Nice!  B is a tiny sharp point separated pretty well from bright A, outside of the bulge A makes.
11h 05m 01.02s +07° 20' 09.6" P.A. 268.00 sep 4.9 mag 4.66,11.00 Sp F2III-IVv dist. 28.99 pc (94.57 l.y.)

A 2378 AB: 508; 533x: Split with seeing, near equal, white.

11h 05m 20.40s +16° 35' 21.4" P.A. 140.00 sep 0.4 mag 9.91,9.80 Sp F5