Friday, October 12, 2018

a few doubles...

Observed for about an hour last night with Big Blue.  Seeing came and went, starting out ok, improving, then going south along with the transparency.

Had a look at a gibbous Mars, with both polar caps visible and a single dark band, bifurcated at one end (basically Mare Sirenum).

Then a few doubles:

Enif = S 798: Bright yellow star with very wide / west PA 3 delta mag star, and much fainter star visible with averted vision, same PA, in between.  277x  [Correctly describes AB--faint pair--and AC--wider pair].
21H 44M 11.14S +09° 52' 30.0" P.A. 323 SEP 83.2 MAG 2.53,12.80 SP K2II

STF 2833: Orange and blue, well separated ~10".  Part of arc of three stars; 3 fainter from a triangle around it.  277x
21H 51M 56.56S +09° 04' 46.0" P.A. 337 SEP 9.1 MAG 7.84,10.20 SP A5

STTA 222: Finder split.  At 553x, wide orange pair, half delta mag.  Maybe third fainter star in arc in the system.
21H 44M 07.92S +07° 09' 29.7" P.A. 258 SEP 87.6 MAG 7.49,8.47 SP F2V

EI 53: Finder split, 1 delta mag.  White and dully yellow.  In the scope, I notice a matched fainter pair to the west.

BU 1212: Very wide, faint B.  553x  [AB,C seen; AB is 0.2"]
21H 39M 31.39S -00° 03' 04.1" P.A. 178 SEP 36.2 MAG 6.63,11.75 SP F6V

STF 2809: Wide, bright A, 2 delta mag.  M2 on edge of FOV in finder as a bloated hazy star!
21H 37M 33.76S -00° 23' 26.0" P.A. 163 SEP 31.1 MAG 6.22,9.36 SP A2III+F5V

M2: At 277x, grainy haze of soft stars, not quite resolved.  Thickened middle.  Arms and ragged outer fringes.  Wants to be brilliant but prevented.

EP Aqr: Very orange, nice in the finder!

Sca 104: Very wide separation, faint B
21H 52M 21.25S -03° 10' 28.8" P.A. 116 SEP 63.3 MAG 6.59,11.00 SP A0

STF 2863: Faint star with very faint, very wide B -- suspected with averted vision at 277x, readily seen at 553x. [Not seen; not sure what I was describing; might've had the star hop wrong]
22H 07M 06.65S +00° 34' 13.0" P.A. 96 SEP 2.5 MAG 8.04,8.41 SP G0

BU 172 = 51 Aqu: Bright white A, very wide and faint B.  557x  [AB,C seen; AB is 0.5" and there are 7 stars in the system.]
22H 24M 06.87S -04° 50' 13.2" P.A. 341 SEP 53.9 MAG 5.77,12.20 SP A0V

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