Clear Sky Clock predicted excellent seeing for last night, so I prepared a list of close doubles in Aquila for the night's observation. Most were <2" separation and about half of the 25 were plotted on the CSDA, and those were the ones I observed. Seeing is to be good tonight too, so I am printing finders for those not plotted in the atlas. I used the 12.5-inch at 553x throughout. I started at 9pm when seeing was good but not great, yet still had nice airy disks. By 10pm it was very good and by 10:30pm it was fantastic, but that was when I needed to pack in. "Wide" in my descriptions refer to the easy by which they were separated. Some of the C pairings were missed because they weren't on the list, being wider than my cut-off criteria:
STF 2404, well split, yellow A and yellow-orange B. [6.92, 7.77; 3.6"]
STT 368 AB: Definite split, 1/2 an airy disk width; near equal brightness. Did not notice AC [7.53, 8.49; 1.1"]
23 Aql AB: Pretty wide separation, just a large difference in magnitudes. A bright orange, B bluish. [5.28, 8.29; 3.2] Faint star much further out was the AC, 13th mag 10".
STF 2545 AB: Easy, wide separation yellow and orange. [6.79, 8.54; 3.8"]. Did not notice C pairing.
AC 12: [Alvin Clark!]: Pretty wide separation, about 1 magnitude difference. [7.54, 8.32; 1.5"]
52 / Pi Aql / STF 2583 AB: Very definite split. A mini Alberio, gold and blue. [6.34, 6.75; 1.5"] Did not see AC pair.
STF 2596: Definite clear split, 2 airy disk widths. (High on the ladder, hanging over to see; drive on the equatorial platform ran out!). [7.29, 8.68; 2"]
HI 93: Easy, fairly wide separation. [7.67, 8.39; 1.8"]
Anonymous ~ 2 minutes east of STF 2654: Bright A and faint B, ~2.5" separation. Very nice.
65, Theta Aql: listed as having an Ab and Ac, with 1" separation, but nothing was seen. Surely an error, or spectroscopic only -- no magnitude given for the 1" pair.
STF 2644: Nice near equal pair, wide separation. [6.92, 7.06; 2.5"]
STF 2643: White and reddish stars, wide separation, large magnitude difference. [8.17, 9.23; 13.8"]
STF 2651 AB: Very close but clear split, equal brightness white stars. In a rich field. This wasn't plotted in CDSA so I swept the area to find; I feel the thrill of discovery. Beautiful sight. Seeing is very calm. Great way to end the session. Too bad I need to go in. [8.41, 8.44; 1.0"]
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