Saturday, October 5, 2019

4 october 2019

Last night had pretty poor conditions: thin clouds, mediocre seeing. But I opened up anyway in case things improved. They didn't much, but I'm surprised that I still had a rewarding session with several neat observations. I used the 8" throughout, removing it once in a while to spot and confirm a faint secondary star. I used my 5mm eyepiece throughout, since it is my "detection" eyepiece -- getting used to the field and the separation it provides. It was dewy but I used the dew controller to manage it. Observed from around 9pm to 11pm. Saw the possum walk along the back fence again.

STF 2596 AB: 8" 553x: Orange pair with 2 delta mag companion, about 2", well split.
19h 54m 01.95s +15° 17' 31.7" P.A. 297 sep 2.1 mag 7.29,8.68 Sp F8V dist. 82.58 pc (269.38 l.y.)

STF 2613 AB: 8" 553x: Easy pair, wide, 1 delta mag light orange color, 4". 
20h 01m 26.66s +10° 44' 54.8" P.A. 352.1 sep 4.14 mag 7.48,8.02 Sp F5V+F5V dist. 80.58 pc (262.85 l.y.)

STF 2616: 8" 553x: Pretty orange and blue pair, well separated about 2 delta mag. B very faint in 8", but know is there. With 20" easily seen as a brighter star. Nice pair
20h 02m 46.04s +14° 34' 57.7" P.A. 268 sep 3.4 mag 6.85,9.64 Sp K0 dist. 483.09 pc (1575.84 l.y.)

STF 2618 AB: 8" 553x: Near equal, whiteish blue stars, wide. Nice
20h 03m 26.98s +15° 28' 14.4" P.A. 115 sep 5.6 mag 9.41,9.77 Sp A0

A 1194 AB: 8" 553x: Near equal bluish-white (seems nearly all 9th magnitude stars appear bluish white in my 8"). Cleanly split with seeing, 1". 
20h 03m 59.56s +12° 21' 23.8" P.A. 317 sep 1.1 mag 9.53,9.70 Sp F8V

STF 2620 AB: 8" 553x: Almost 2 delta mag, ~1.5" easily split pair, nice. [Eclipsing binary]
20h 04m 09.25s +11° 47' 40.3" P.A. 287 sep 1.9 mag 8.23,9.18 Sp B9 dist. 4347.83 pc (14182.62 l.y.)

STF 2621 AB: 8" 553x: More equal than SkyTools data shows, one is orange and the other blue. Maybe the orange star is variable. Wide separation, another nice pair 
20h 04m 34.52s +09° 14' 24.2" P.A. 224 sep 5.7 mag 8.36,8.62 Sp B8V+A1V dist. 228.83 pc (746.44 l.y.)

BU 57 AB: 8" 553x: = V1472 Aql: At 8" the B appears as a suspected brightening in the diffraction, whitish to the A star's orange. At 20" the B star is obvious and blue a nice sharp point ~2.5"
20h 05m 26.53s +15° 30' 01.3" P.A. 120 sep 2.6 mag 6.60,11.00 Sp M2.5III dist. 126.26 pc (411.86 l.y.)

J20065+1253A 8" 553x: Well seen with 8", wide but pretty faint. Not too hard to see the faint B since it's so wide

BU 428 AB: 8" 553x: Definite hard split with 20", slightly yellow A and yellow-orange B star. With 8" the B is more a round haze snowman-to-hairline split with seeing. 
20h 06m 43.37s +12° 56' 12.1" P.A. 356 sep 0.8 mag 7.55,9.13 Sp F4III

BRT 1336 AB: 8" 553x: Easy wide split about half delta mag, stars appear blue
20h 07m 00.13s +12° 20' 16.8" P.A. 292 sep 5.5 mag 9.90,10.85 Sp A0III

STF 2629 AB: 8" 553x: White and rather strikingly blue star (and I don't think it's blue because it's faint), wide separation, 2 delta mag.
20h 07m 20.78s +16° 04' 34.7" P.A. 188 sep 9 mag 7.63,10.61 Sp B9IV dist. 1000 pc (3262 l.y.)

STF 2628 AB: 8" 553x: Nice, very pretty white and light orange B star, 3 delta mag, wide separation. Very pretty pair.
20h 07m 50.37s +09° 23' 59.4" P.A. 338 sep 3 mag 6.60,8.66 Sp F3V dist. 39.37 pc (128.42 l.y.)

STF 2742 AB: 8" 553x: = Lam Equ Sky Tools says 1 delta mag but these are near equal, white, wide 3" separation.
21h 02m 12.51s +07° 10' 47.3" P.A. 215 sep 2.9 mag 7.41,7.64 Sp F8 dist. 80.97 pc (264.12 l.y.)

STF 2749 AC: 8" 553x: Pretty yellow A and slightly red B, about 2 delta mag, wide about 3" [several other pairs in system]
21h 04m 45.11s +03° 32' 02.0" P.A. 177 sep 3.4 mag 8.06,9.36 Sp G0 dist. 81.83 pc (266.93 l.y.)

STF 2765
AB: 8" 553x: White, more equal than the 1 delta mag Sky Tools has, about 3" sep. [AC 14th mag not seen]
21h 10m 59.31s +09° 32' 57.9" P.A. 79 sep 2.8 mag 8.47,8.50 Sp A3IV dist. 151.98 pc (495.76 l.y.)

BU 163 AB: 8" 553x: Can resolve in 20" and once know where B is, can split with 8", but B is much fainter and is more a brightening in the first diffraction than at star [Several other fainter pairs]
21h 18m 34.85s +11° 34' 08.2" P.A. 77.4 sep 0.92 mag 7.31,8.88 Sp G0V+G6V dist. 47.66 pc (155.47 l.y.)

STF 2786 AB: 8" 553x: Sharp white and B is about 1 delta mag and duller, almost bluish. 
21h 19m 39.36s +09° 31' 30.3" P.A. 189 sep 2.8 mag 7.49,8.20 Sp A3IV dist. 185.53 pc (605.2 l.y.)

BRT1355 AB: 8" 553x: Picked out right away with 8" but B is better seen with averted vision, flashed better into view. 
21h 22m 25.59s +11° 11' 01.4" P.A. 194 sep 3.9 mag 11.50,12.50

STF 2767 AB: 8" 553x: Nice and sharp near equal (not the 1 delta mag Sky Tools has), well separated ~4"
21h 10m 30.43s +19° 57' 35.7" P.A. 29 sep 2.5 mag 8.19,8.47 Sp F4V dist. 181.82 pc (593.1 l.y.)

J21297+1719A 8" 553x: Elongated and notched with seeing, helped brighten the components with averted vision. Didn't try higher power due to seeing.

STF 2804 AB: 8" 553x: Nice light orange and light blue, sharp, 1 delta mag 3". pretty.
21h 32m 58.30s +20° 42' 44.5" P.A. 1 sep 3.7 mag 7.70,8.04 Sp F5V dist. 56.53 pc (184.4 l.y.)

STT 445 AB: 8" 553x: Obvious elongation and would split if transparency were better, but as is the bloated diffractions bleed into each other, so more notched than split. 
21h 39m 19.03s +20° 43' 17.8" P.A. 121 sep 1 mag 9.54,9.87 Sp A2

AG 277 AB: 8" 553x: Easy, seems half or more delta mag than the point two in Sky Tools, wide about 3". [not physical]
21h 46m 04.21s +21° 11' 12.2" P.A. 62 sep 2.7 mag 9.89,9.99 Sp G5

STF 2841 A-BC: 8" 553x: Very wide 2 delta mag pair, white and light blue [COU 432 is the AB, 0.1" near equal, was 0.2" at discovery!]
21h 54m 17.44s +19° 43' 05.3" P.A. 110 sep 22.4 mag 6.45,7.99 Sp K0III+F7V dist. 102.99 pc (335.95 l.y.)

STF 2854 AB: 8" 553x: Striking pair, more near equal then 1 delta mag in Sky Tools. 2", white. Very nice. 
22h 04m 22.52s +13° 38' 53.4" P.A. 84 sep 1.5 mag 7.77,7.89 Sp F6V dist. 72.1 pc (235.19 l.y.)

HD 210407: 8" 553x: Need averted vision to bring out B, but it splits even with such odd viewing.

STF 2905 AB: 8" 553x: Nice near equal about 3", pretty. [not physical]
22h 27m 12.81s +15° 09' 12.8" P.A. 285 sep 3.4 mag 9.28,9.34 Sp G1V

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