4 march 2020

Clear Sky Charts' forecast was for above average transparency after dark. Unfortunately it was not so. A persistent haze was left in the sky, and was brightly illuminated by a waxing moon. I watched as the forward white lights of passenger jets lining themselves up to land at the airport shown out through the fog. A disappointing night, but I persisted to make what observations I could. So Transparency 2/5, and seeing a half decent 6/10. Seeing was good enough that in the beginning of the night I was able to observe 6 Plato craterlets (D, C, A, g, B), including the one near the west rim slumped wall (e), which I think is the first time I've seen it.  It was with seeing at 333x, but it was really cool to see those.  I left my apodizing mask on throughout the doubles session, which was for 90 minutes starting at 9pm.

BU 21 AB; 508; 213x: Eta CMi: Using as a separation distance gauge for Procyon B using the 25mm with barlow. Easy bright yellowish star with a reddish much fainter B, wide. [Based on the image scale, I definitely did not see Procyon B last week.  The separation at 4" was not much wider than the thickness of the wire, but what I thought I saw on Procyon was much wider than that -- so it was probably glare.  I will update the report.]
07h 28m 02.08s +06° 56' 31.5" P.A. 28 sep 4.1 mag 5.25,11.10 Sp F0III dist. 97.56 pc (318.24 l.y.)

HDS 999 AB; 508; 1067x: I detect a bluish bump on one side of the orange A star at best moments, and assume this is the B star, but I'm unsure. It is just a discoloration along the rim with a very slight bump out. Seeing is not good enough to resolve.
07h 12m 07.50s +05° 28' 27.7" P.A. 7 sep 0.3 mag 6.40,9.09 Sp K0III dist. 196.08 pc (639.61 l.y.)

STF 1048 AB; 508; 533x: Pretty wide, >1 delta mag, light orange stars
07h 14m 14.25s +04° 12' 26.5" P.A. 351 sep 5.9 mag 9.14,10.07 Sp A5 dist. 286.53 pc (934.66 l.y.)

J 59 AB; 508; 533x: Faint pair, but seen nicely. Blue-white stars, near equal, ~1.5", nearly wide.
07h 13m 09.27s +02° 50' 40.8" P.A. 205 sep 1.5 mag 10.19,10.44 Sp A3

BRT1227 AB; 508; 533x: Light yellow-orange A is easy to see, the B star is much fainter, can see with direct vision but sharpens with averted vision. Transparency is poor and the sky is bright with a waxing moon.
07h 15m 03.14s +10° 51' 25.6" P.A. 321 sep 8.1 mag 9.92,11.70

HEI 725 AB; 508; 533x: Faint pair but sharp with seeing, nicely split ~1", less than half magnitude difference but it is noticeable. Nice pair
07h 18m 06.19s +10° 34' 53.4" P.A. 348 sep 1 mag 10.47,10.72 Sp F5

BRT1229A; 508; 533x: B star needs averted vision to appear, widely separated ~4", faint light yellow A but there's a significant magnitude difference. [not physical]
07h 18m 20.96s +10° 50' 07.4" P.A. 353 sep 4.5 mag 9.94,11.10

BAL2265 AB; 508; 533x: Faint, B actually needs averted vision to see well, very wide pair. conditions bad [not physical]
07h 18m 30.00s +03° 27' 37.0" P.A. 93 sep 14 mag 10.04,10.45

STF 1073 AB: 508; 53x: Pretty pair, wide, ~3 delta mag, blue-white A and ruddy B
07h 21m 00.62s +10° 11' 44.2" P.A. 67 sep 9 mag 7.87,10.15 Sp A1IV dist. 164.2 pc (535.62 l.y.)

J 366 AB: 508; 533x: Pretty pairing, ~2.5", light yellow-orange A and a deepter yellow-orange B, 2 delta mag. Nice pair
07h 24m 01.28s +12° 04' 27.4" P.A. 136 sep 2.3 mag 8.86,10.44 Sp F8

A 2865 AB; 508; 533x: At 533x i can tell is it not single, it's a bit smudgy, and with averted vision it clearly flashes an elongation. At 1067x I can't get a clean enough focus to resolve due to seeing.
07h 24m 40.32s +05° 16' 51.0" P.A. 107 sep 0.6 mag 10.34,10.59 Sp F5

J 1063 AB; 508; 533x: B is on edge of direct vision, I can see some smudge there with direct vision but averted vision clears it up. ~2", 1.5 delta mag.
07h 25m 19.23s +03° 12' 10.7" P.A. 56 sep 2.6 mag 10.64,10.90

A 2866 AB; 508; 1067x: B seen only at the best moments, and very briefly as a very faint star ~0.5" sep and very much fainter than A star. Frustratingly tough since this should not be a problem usually except for tonight's poor transparency and average seeing.
07h 26m 39.08s +04° 23' 34.1" P.A. 138 sep 0.6 mag 9.34,10.04 Sp G0

BAL 1098 AB; 508; 533x: Easy pair, creamy white A and 3 delta mag B, wide.
07h 28m 12.83s +00° 35' 16.9" P.A. 122 sep 6.6 mag 9.29,10.80 Sp A5

A 2893 AB; 508; 533x: Closely split, noticeable ~1 delta mag, good pair
08h 30m 05.67s +05° 13' 03.9" P.A. 351 sep 0.7 mag 9.85,9.43 Sp A5 dist. 591.72 pc (1930.19 l.y.)

STF 1243 AB: 508; 533x: Well split ~2", 2 delta mag, blue-white A and dull white B
08h 33m 53.79s +01° 35' 07.5" P.A. 233 sep 1.7 mag 7.85,9.39 Sp A0 dist. 273.97 pc (893.69 l.y.)

J 1008 AB; 508; 533x: Easy pair, not too faint, wide ~3", equal mag. [not physical]
08h 39m 23.43s -00° 16' 32.0" P.A. 20 sep 3.1 mag 10.91,11.12 Sp F2

BAL 1852 AB: 508; 533x: Not likely to be physical. Wide, half delta mag white stars [not physical]
08h 42m 37.69s +02° 14' 25.3" P.A. 6 sep 14.3 mag 10.96,10.97

BAL 2821 AB; 508; 533x: A bit faint pair, half delta mag, wide [not physical]
08h 43m 26.88s +03° 40' 13.0" P.A. 83 sep 10 mag 12.60,13.10

STF 1270 AB; 508; 533x: MX Hya. Wide, yellow-white, half delta mag. Nice.
08h 45m 20.79s -02° 36' 03.7" P.A. 265 sep 4.7 mag 6.89,7.54 Sp F2IV dist. 61.77 pc (201.49 l.y.)

BU 335 AB; 508; 533x: 3 delta mag, well split ~3", very pleasing pair, white A and slightly red B.
08h 48m 12.24s +02° 34' 48.4" P.A. 265 sep 2.6 mag 7.46,9.41 Sp F5 dist. 153.37 pc (500.29 l.y.)

STT 194 AB; 508; 533x: Orange A and blue B, 3 delta mag, very wide [not physical]
08h 48m 18.30s +00° 33' 18.1" P.A. 57 sep 12.6 mag 7.40,10.47 Sp K2 dist. 316.46 pc (1032.29 l.y.)

J 74 AB; 508; 533x: Faint near equal, bluish, pretty wide. Forms part of a triangle with similar magnitude stars [not physical]
08h 50m 23.22s +01° 24' 47.2" P.A. 126 sep 9.3 mag 11.20,11.30

BAL 2354 AB; 508; 533x: B is quite faint, need averted vision to notice it, but then can hold direct, 3 delta mag, pretty wide, ~8" [not physical]
08h 51m 27.36s +02° 55' 49.8" P.A. 40 sep 8.5 mag 9.94,11.70 Sp K0

A 2900 AB: 508; 533x: Surprised I could get pretty fine focus. Elongated or olive shape, not quite notched, certainly a double but difficult.
08h 52m 24.18s +05° 20' 25.2" P.A. 310 sep 0.7 mag 6.44,9.46 Sp A5V dist. 309.6 pc (1009.92 l.y.)

STF 1292 AB; 508; 533x: Near equal, wide, ~6". Very faint star ~20" may be plus one [it is, UC 1728 AC, 9.32/13.42 27.8"]
08h 53m 46.02s -00° 34' 41.6" P.A. 189 sep 6.1 mag 9.32,9.53 Sp A5

BAL 1430 AB; 508; 533x: Faint, wide, noticeable not-quite-half magnitude difference [not physical]
08h 54m 37.08s +01° 27' 00.3" P.A. 110 sep 11.5 mag 10.08,10.97 Sp F8

SAO 117344; 508; 1067x: Notched, slight mag difference. too poor to split tonight [can't find in WDS -- as I recall SkyTools data was around 0.5" and 1 delta mag.]

STF 1302 AB: 508; 533x: Near equal easy pair, ~2.5"
09h 01m 12.87s +02° 44' 44.4" P.A. 233 sep 2.7 mag 9.31,9.47 Sp F8