20 october 2019

Observed last night with the 20" from about 8:30pm to 11:30pm. It gets dark enough now early that I can have good solid times to observe. Transparency was on the low end as seems to be typical now. Seeing started off pretty decent at 7/10 but actually improved to 8-9/10 after 10:15pm or so, and I was able to capture some pretty close pairs. A satisfying session, and I was able to use full aperture throughout. Very unfortunately I needed to wrap up since it was a work night; someday I'll not have to.

HJ 938 AB: 20" 333x: Orange star and widely separated B, only noticed with averted vision, then can briefly hold direct. [not physical]
21h 36m 25.16s +07° 52' 58.6" P.A. 123 sep 11.4 mag 7.80,11.80 Sp K2 dist. 142.45 pc (464.67 l.y.)

STT 443 AB: 20" 333x: Nice near equal pair, very light orange color stars, wide separation
21h 37m 37.05s +06° 42' 36.1" P.A. 349 sep 8.3 mag 9.47,9.67 Sp K2

ROE 128 AB: 20" 533x: Noticed as double @ 333x, but increased magnification to 533x for definitive split. Faint pair, one edge of direct vision for tonight's poor transparency, very close, about one delta mag, definite clean split >1"
21h 39m 07.47s +12° 51' 43.7" P.A. 264 sep 1.4 mag 10.50,10.80

AG 419 AB: 20" 533x: Light orange pair, about half delta mag and 5", rather pretty
21h 39m 55.27s +14° 27' 05.2" P.A. 223 sep 3.8 mag 9.70,10.50 Sp F8

HO 465 AB: 20" 533x: A is a pretty white-yellow star and the B and C pair are half delta mag, a little wide, though the two together are close. A is certainly not round with a PA slightly off perpendicular to the B and C position angle. viewed at twenty, five and barlow.
21h 46m 28.79s +22° 10' 28.1" P.A. 247 sep 44.7 mag 7.09,11.50 Sp A7IV dist. 167.22 pc (545.47 l.y.)

HDS 3101 Aa,Ab: 20" 1067x: A is certainly not round with a PA slightly off perpendicular to the B and C position angle.
21h 46m 28.79s +22° 10' 28.1" P.A. 18 sep 0.2 mag 7.24,9.59 Sp A7IV dist. 167.22 pc (545.47 l.y.)

BRT 2500 AB: 20" 533x: Easy pair, half delta mag, ~5" [not physical]
21h 48m 45.97s +21° 43' 36.8" P.A. 243 sep 4.6 mag 11.20,11.70

COU 14 AB: 20" 1067x: = 13 Peg. Out of round to notched, one fainter than the other, jittery but there. Used apodizing mask to settle diffraction.
21h 50m 08.64s +17° 17' 09.4" P.A. 207.8 sep 0.21 mag 5.74,6.94 Sp F2III-IV dist. 33.42 pc (109.02 l.y.)

WSI 24 AB: 20" 533x: Easy pair, wide, about one delta mag, one light orange other light blue color
21h 51m 22.68s +19° 15' 58.9" P.A. 24 sep 14.2 mag 10.60,10.90

BRT 2501 AB: 20" 533x: Two white stars ~5" and half delta mag [not physical]
21h 51m 37.79s +21° 34' 28.5" P.A. 324 sep 5.2 mag 10.60,10.70

HO 173 AB: 20" 533x: ! Very fine pair, almost one delta mag, very close but nicely split, <1", quite a sight
21h 55m 17.17s +18° 43' 11.7" P.A. 73 sep 0.9 mag 10.34,10.63

STT 452 AB: 20" 533x: ! Noticed split immediately, white stars, half delta mag, very cool split.
21h 55m 40.01s +07° 15' 13.9" P.A. 177 sep 0.8 mag 9.04,9.63 Sp F8 dist. 189.04 pc (616.65 l.y.)

STF 2848 AB: 20" 533x: Wide, bright white stars, half delta mag, ~10"
21h 58m 01.45s +05° 56' 25.3" P.A. 57 sep 10.9 mag 7.21,7.73 Sp Am+F2V dist. 625 pc (2038.75 l.y.)

A 304 AB: 20" 533x: ! Most definite clean split of one delta mag stars, very nice disks
21h 58m 30.37s +27° 24' 34.6" P.A. 131 sep 0.6 mag 9.52,9.33 Sp A2

STF 2850: 20" 533x: = OU Peg. ! Very beautiful pair, rich orange and blue, well separated, four or five delta mag.
21h 59m 49.60s +23° 56' 27.4" P.A. 264 sep 2.8 mag 7.00,11.00 Sp M5 dist. 621.12 pc (2026.09 l.y.)

HO 610 AB: 20" 533x: ! Superfine, split nicely, ~0.7", half delta mag. [three other wider >12th mag pairs not seen]
22h 02m 00.73s +26° 50' 46.6" P.A. 240 sep 0.7 mag 10.07,10.25 Sp G0

BRT 2840 AB: 20" 533x: Faint, about one delta mag, ~2", near another near equal pair
22h 06m 08.43s +20° 33' 57.6" P.A. 316 sep 2.4 mag 10.00,10.70

COU 136 AB: 20" 1067x: ! Awesome hairline at 533x, nice clean split at 1067x. The stars are split the diffraction patters merge at the boarders, perfect images. Appears more near equal than SkyTools data suggests.
22h 10m 02.22s +23° 07' 33.0" P.A. 17.1 sep 0.45 mag 9.20,7.56 Sp F6IV dist. 93.81 pc (306.01 l.y.)

CHR 106 AB: 20" 533x: SkyTools does not give a magnitude for the 0.5" paring, and none visible with 533x (with apodizing mask). suspect some error in data or maybe a k band [WDS note says "X Dubious double]
22h 10m 18.96s +19° 36' 59.6" P.A. 9 sep 0.5 mag 6.18, Sp G0V dist. 59.24 pc (193.24 l.y.)

EGG 4 AB: 20" 533x: Easy split, noticed right away, a bit more near equal magnitudes than SkyTools data.
22h 10m 57.51s +24° 29' 19.0" P.A. 150 sep 0.7 mag 9.48,9.37 Sp F7Vwe dist. 154.32 pc (503.39 l.y.)

MLB 723 AB: 20" 533x: Easy, if a bit faint; ~2" and one delta mag
22h 12m 00.90s +25° 46' 28.7" P.A. 339 sep 2.3 mag 10.00,10.50

HJ 958 AB: 20" 533x: Pretty one delta mag pair, wide separation. [High proper motion star]
22h 13m 09.96s +21° 47' 40.6" P.A. 233 sep 5.8 mag 9.89,10.64 Sp F8+G5

AG 281 AB: 20" 533x: Easy 1.5 delta mag, ~<3", slightly bluish stars
22h 14m 49.53s +21° 56' 59.3" P.A. 19 sep 2.7 mag 9.42,10.45 Sp F2 dist. 166.39 pc (542.76 l.y.)

COU 138 AB: 20" 533x: ! Wonderful faint pair, ~2" and two delta mag, very fine. Almost need averted vision but not quite.
22h 15m 16.25s +23° 53' 39.5" P.A. 37 sep 1.5 mag 11.44,11.90

TDT 3436 AB: 20" 1067x: Seems to stretch to N-S elongation but very marginal
22h 16m 17.12s +25° 46' 35.2" P.A. 186 sep 0.5 mag 10.62,10.79

HU 383 AB: 20" 1067x: ! Suspected split with 533x, but no question of split at 1067x, very nice split near equal stars.
22h 19m 36.43s +21° 07' 00.6" P.A. 27 sep 0.4 mag 9.91,10.07 Sp F5