27 august 2019

Seeing was not great last night, but transparency was even worse. Most of the stars I went for with hazy and unresolvable, even 1" separated 11th mags. I spent the second half of the session using the 8" mask. The area of Hercules I was in (16:40 -17:30) had many 11th, 12th, & 13th pairs which I needed to skip over. I was also a bit tired, so it was a short session, about an hour. No particular standouts, but a new designation observed, WFC

STF 2098: AB, AC, AD, 20" 333x: A four star system all within a mag of each other, forming a gentle arc. [Actually 5 stars, I missed DE which is 13th mag. Says it's physical -- all 5 are?]
16h 45m 43.47s +30° 00' 17.2" P.A. 145 sep 14.3 mag 8.77,9.61 Sp F2V dist. 89.69 pc (292.57 l.y.)

AG 351: 20" 333x: Pretty, near equal pair, 3" separated, light orange stars. In an asterism which looks like Orion, with these two forming a belt. [Surprise, this isn't physical]
16h 46m 16.28s +24° 37' 33.2" P.A. 304 sep 3 mag 10.27,10.65 Sp F8

TDT 82 AB 20" 667x: Tough, seeing and transparency not quote good enough. Suspected elongation at 333x and 667x showed one star pretty clearly but only a haze and elongation where fainter B was. [only one measure observation of this pair]
16h 46m 45.43s +27° 05' 26.9" P.A. 356 sep 0.6 mag 11.36,11.40

A 227 AB, 20" 667x: Easy near equal pair, light orange, 2"
16h 46m 56.49s +27° 00' 59.2" P.A. 237 sep 2.1 mag 10.46,10.50 Sp K0

HU 666 AB: 20" 667x: When A star settles down to a disk, the B star is an unresolved haze in the diffraction ring, very faint.
16h 47m 23.01s +23° 00' 06.2" P.A. 226 sep 0.5 mag 9.30,13.10 Sp G5

WEI 31 AB, AC, BC: 20" 667x: Two plus one system, the two closest AB nearly equal, AB a little fainter. White to yellowish white. Well separated all of them, surprised Struve missed them
16h 47m 35.08s +25° 38' 21.6" P.A. 317 sep 4.9 mag 9.94,10.12

STF 2107: AB, 20" 667x: Nice pair yellow and slightly blue two delta mag, about 1.5" [AC is 11.5 and much further separated]
16h 51m 50.10s +28° 39' 58.7" P.A. 107 sep 1.39 mag 6.90,8.50 Sp F5IV dist. 58.41 pc (190.53 l.y.)

STF 2109 AB 20" 667x: Yellow A and very light blue three delta mag wide separation B.
16h 53m 45.78s +21° 10' 22.6" P.A. 313 sep 5.9 mag 7.52,10.30 Sp K0 dist. 188.68 pc (615.47 l.y.)

TDT 163 AB 20" 667x: I can pick up both stars within a haze using averted vision, one is noticeably fainter than the other. Suspect elongation with direct vision. [one measured observation]
16h 58m 31.13s +23° 50' 35.7" P.A. 276 sep 1.2 mag 11.52,12.39

TDS 846 AB 20" 667x: Split very briefly at finest moment, after a lot of shimmer. Near equal to half a delta mag.
16h 58m 36.45s +26° 37' 00.9" P.A. 78 sep 1.2 mag 9.71,11.69

STF 2135 AB, 8" 667x: Down to 8 inch mask due to seeing. Pretty yellow star with widely separated 2 delta mag bluish B. [Not physical]
17h 12m 06.06s +21° 13' 44.4" P.A. 195 sep 8.7 mag 7.59,8.88 Sp K0 dist. 152.44 pc (497.26 l.y.)

WFC 189 AB " 667x: Faint near equal half delta mag blush stars, wide
17h 12m 11.20s +21° 36' 39.2" P.A. 302 sep 6.7 mag 10.03,10.64

BU 44 AB, AC: 8" 667x: Two plus one system, the closest 1 delta mag, the further pair fainter still. wide all [Not physical]
17h 13m 55.16s +28° 48' 09.0" P.A. 18 sep 5.6 mag 9.19,9.70 Sp A5

STF 2137 AB = V655 Her, 8" 667x: B pretty faint, wide separation, white stars. Transparency is poor now.
17h 13m 53.67s +15° 57' 03.2" P.A. 145 sep 4.1 mag 9.15,10.03 Sp A2 dist. 416.67 pc (1359.18 l.y.)

STF 3127 AB 8" 667x: Very bright yellow white A and bluish B at least four delta mag, wide separation., I don't think it would be seen but for the mask tightening A's diffraction
17h 15m 01.92s +24° 50' 22.5" P.A. 288 sep 12.7 mag 3.12,8.30 Sp A3IV dist. 23.04 pc (75.16 l.y.)

HU 489 AB, 8" 667x: Elongation with eight inch mask but not split 667x
17h 15m 32.00s +20° 06' 56.8" P.A. 36 sep 1 mag 10.38,10.81 Sp A5