23 september 2019

Last night was pretty good, in spite of mediocre seeing (around 6/7) and 2-3/5 transparency. Seems I haven't had a clean clear night in ages. Nonetheless I captured a few difficult pairs. I replaced my hand controller cable, which had three connections to it (going through a stalk and then extending out to the HC itself) with a single cable running from the Servo CAT to the HC. The control was much improved; what I thought was backlash delay from when I pressed a button to when the scope moved, I think now was really just a poor connection between the HC and the Servo CAT. It makes me consider if I should get rid of the stalk connections altogether, since this is meant to be a permanent set-up, I don't need the stalk interface...

STF 2390 AB: 20" 553x: Light yellow and pale blue, wide, 2 delta mag.
18h 45m 49.83s +34° 31' 06.6" P.A. 155 sep 4.3 mag 7.37,8.56 Sp A7V dist. 357.14 pc (1164.99 l.y.)

SLE 120 AB 20" 553x: Fairly wide, about half delta mag, 7". Plain stars [not physical]
18h 45m 49.38s +31° 13' 17.8" P.A. 115 sep 6.9 mag 11.60,11.70

SLE 366 AB 20" 553x: Faint orange and blue, pretty pair, wide about 9", almost one delta mag
18h 46m 04.64s +27° 34' 17.3" P.A. 337 sep 10 mag 10.60,12.38 Sp F1

TDT1047 AB: 20" 553x: Seeing not supporting steady view, but suspected elongation and notch at 553x, and at 1067x the image is soft but certainly a pair of stars in haze flashing brighter with averted vision

18h 46m 24.73s +28° 15' 24.5" P.A. 242 sep 0.7 mag 11.49,11.71

HU 935 AB 20" 553x: Easy pair, ~3", one detla mag, yellow white stars. well split [not physical]
18h 46m 38.12s +32° 10' 02.9" P.A. 153 sep 3 mag 9.88,10.57 Sp F5

BRT 261 AB 20" 553x: Quite easy pair, almost one delta mag, wide about 4-5".
18h 46m 48.48s +30° 53' 55.4" P.A. 18 sep 4.7 mag 10.30,11.20

STF 2397 AB, 20" 553x: Light orange and blue, pretty pair, two delta mag, wide ~5"

18h 47m 13.09s +31° 24' 20.2" P.A. 269 sep 3.9 mag 7.47,9.08 Sp G3III dist. 271 pc (884 l.y.)

COU1154 AB 20" 667x: ! Suspect notch at 553x, 1067x too hazy, but great clean split at 667x, very small, near equal. What a great sight.
18h 47m 38.65s +32° 47' 28.9" P.A. 55 sep 0.6 mag 11.07,11.00

TDT1063 AB 20" 667x: Suspected at 553x, with 667x can observe elongation, and with averted vision it flashes definite elongation and at times split. Need to avert vision for the B star to be seen and to split but can hold if seeing steadies.

18h 48m 38.18s +31° 32' 09.6" P.A. 299 sep 0.6 mag 11.50,11.53

J 1208 AB 20" 553x: Easy white near equal, wide, about 5". May be another double in filed, which has a brighter A star but much fainter B, around 6" separation
18h 49m 14.79s +28° 34' 47.1" P.A. 334 sep 4.7 mag 11.50,12.10

STF 2406 AB: 20" 553x: White star and much fainter B, ~4" sep, four delta mag. B looks a little red, pale.
18h 49m 55.77s +26° 25' 30.6" P.A. 4 sep 4.6 mag 7.12,11.21 Sp A3V dist. 118.34 pc (386.03 l.y.)

A 256 AB 20" 553x: ! Orange pair, about 2 delta mag, wide 4-5". Nice pair.
18h 50m 03.54s +31° 48' 48.2" P.A. 59 sep 2.9 mag 9.04,11.17 Sp G5

HJ 1352 AB 20" 553x: White star and very much fainter blue B, wide. [not physical]

18h 50m 03.28s +29° 48' 55.0" P.A. 251 sep 13.5 mag 7.62,11.30 Sp A0III dist. 338.98 pc (1105.75 l.y.)

COU 1012 AB 20" 667x: Split best moments at 667x, suspect elongation 553x. Always elongated but needs seeing to still for split. Noticeable difference in mag, about one delta mag, but the stars are so close together is hard to tell.

18h 51m 49.06s +31° 05' 00.5" P.A. 239 sep 0.4 mag 9.60,10.90 Sp F2

HDS 2677 Aa-Ab: 20" 667x: Pale yellow star resolved as a point on the first diffraction, very faint, only when seeing tightens
18h 52m 27.43s +26° 32' 05.6" P.A. 81 sep 1 mag 8.34,12.12 Sp G0V dist. 62.07 pc (202.47 l.y.)

TDT1118 AB 20 667x: Averted vision flashes elongation, but this one is very tough. Without AV I see a tight notched rod, very small, with notable difference in brightness.
18h 53m 39.35s +30° 08' 06.3" P.A. 161 sep 0.6 mag 11.27,11.45

HU 1294 AB: 20" 667x: ! Well split, 1.5 delta mag, 2" sep, light orange and blue stars. pretty.

18h 54m 14.83s +32° 14' 12.7" P.A. 118 sep 1.6 mag 9.55,10.62 Sp F5

BRT 3335 AB 20" 553x: Easy near equal, wide. These are the central stars of an arc of four. [not physical. DAL 5 AC is likely one of these additional stars in the arc, 12.07 26.2".]
18h 54m 35.26s +27° 54' 16.5" P.A. 69 sep 10 mag 11.92,11.71

A 258 AB: 20" 667x: Very tough. I get elongation at 553x, and more clear elongation at 667x, but no split, not even notching, more like an unevenly illuminated rod. Seeing not support higher power.
18h 54m 59.91s +30° 52' 45.5" P.A. 237.7 sep 0.31 mag 8.86,9.88 Sp G0

TDT 1139 AB: 20" 553x: Faint pair not quite equal, wide ~4". Seems an elongated haze behind it, as if in front of galaxy , or unresolved stars [Checked DSS, no galaxy behind it, and not particularly dense with stars]

18h 56m 32.12s +26° 51' 50.3" P.A. 242 sep 2.9 mag 10.79,11.85

J18570+2747A AB 20" 667x: Suspect elongation 553x, @ 667x definite sense and flash of B star with averted and can hold when seeing stills

STF 2695 AB: Using 8" mask at 667x, no sign of elongation. With 20" and progressively higher magnifications, I can get to olive shape at 1067x, but extremely marginal. [0.8" at discovery, so easier for Struve]
20h 31m 58.19s +25° 48' 18.1" P.A. 257.8 sep 0.44 mag 6.58,8.75 Sp Am+A2 dist. 87.03 pc (283.89 l.y.)

ROE 13 AB: 20" 553x: Nice wide pair two delta mag white stars.
20h 32m 23.61s +22° 26' 02.7" P.A. 41 sep 6.4 mag 9.97,12.00 Sp F5+G5

A 2793 AB: 20" 553x: ! Nice! very fine pair, white stars, half delta mag, close, ~1"

20h 36m 29.63s +23° 41' 43.5" P.A. 210 sep 0.9 mag 9.90,10.26 Sp F8

AG 260 AB: 20" 553x: Yellow and light yellow stars, wide and bright, nice pair
20h 38m 09.42s +25° 10' 51.2" P.A. 219 sep 9.7 mag 8.38,10.00 Sp G5

TDT 2441: 20" 667x: ! Very difficult and faint B star appears with averted vision, only at the instant seeing settles the A star down to a clean round diffraction. B is a brown hard point on the diffraction ring. very tough.
20h 38m 20.78s +21° 05' 37.5" P.A. 102 sep 0.6 mag 10.56,10.58