Saturday, January 29, 2022

26 january 2022

Another night out with the 6-inch refractor, fairly decent seeing with some marine haze.  I find just using the Tour mode on the Argo leads to some repeated observations as there's no way, outside of reloading the target list, to remove what has already been observed.

STF 816 AB: 152; 175x: Ice blue-white A and 3 Dm faint blue B, well separated.
05h 54m 55.46s +05° 51' 38.8" P.A. 287.00 sep 4.0 mag 6.90,9.27 Sp B9 dist. 239.23 pc (780.37 l.y.)

STF 795 AB: 152; 245x: Hairline split, slightly unequal white stars.  1260-year period, it will tighten rapidly the next 40 years or so
05h 48m 00.21s +06° 27' 14.5" P.A. 220.50 sep 1.0 mag 5.99,6.03 Sp A5V dist. 165.02 pc (538.3 l.y.)

STF789 AB: 152; 175x: Fairly bright white A and very much fainter B, quite wide
05h 45m 01.80s +04° 00' 29.3" P.A. 150.00 sep 14.0 mag 6.13,10.17 Sp gF0n dist. 58.86 pc (192 l.y.)

STF840 A-BC: 152; 175x: White stars, wide, 1 Dm.  BC is 9.8/10.1 0.4"
06h 06m 28.04s +10° 45' 01.0" P.A. 248.00 sep 21.5 mag 7.17,8.95 Sp A0V+F0 dist. 225.73 pc (736.33 l.y.)
 
STF788 AB: 152; 175x: White stars, wide, 1 Dm.
5h 44m 43.46s +03° 49' 53.1" P.A. 91.00 sep 7.5 mag 7.61,10.05 Sp B9 dist. 295.86 pc (965.1 l.y.)

STT124 AB: 152; 456x: Softly notched elongation, 140-year period and will close rapidly the next 20 years
05h 58m 53.23s +12° 48' 29.8" P.A. 306.40 sep 0.3 mag 6.11,7.37 Sp K2III+A5V dist. 243.31 pc (793.68 l.y.)

STF738 AB: 152; 175x: Meissa.  Bright pair, 2 Dm, nicely separated.  
05h 35m 08.28s +09° 56' 03.0" P.A. 44.00 sep 4.3 mag 3.51,5.45 Sp O8III+B0V dist. 336.7 pc (1098.32 l.y.)

ARN 37 AC: 152; 175x: Wide, white, near equal, called physical due to proper motions, with a third much fainter star closer in at a right angle to the first (this is H5 100 AB, 5.91/10.44 36.7").  
05h 58m 24.44s +01° 50' 13.6" P.A. 293.00 sep 177.8 mag 5.92,6.94 Sp A5m dist. 111.73 pc (364.46 l.y.)

STF 982 AB: 152; 175x: Cream white A and 2 Dm B, well split.  1750-year period, it has a very rapid periastron in its orbit, but not until the 3400s
06h 54m 38.63s +13° 10' 40.1" P.A. 142.40 sep 7.4 mag 4.75,7.80 Sp F0Vp dist. 25.63 pc (83.61 l.y.)
STF1007 AD: 152; 175x: Wide, white, near equal, with one having a much fainter star close by (AC)
07h 00m 37.12s +12° 43' 24.2" P.A. 28.00 sep 67.7 mag 7.43,7.74 Sp A2V dist. 280.11 pc (913.72 l.y.)

BU100 AB: 152; 175x: Very fine, moderately bright white A and very faint B, quite close, near STF 1007.
07h 00m 56.55s +12° 24' 00.4" P.A. 259.00 sep 3.4 mag 7.34,11.10 Sp K0

HJ 3288 AB: 152; 175x: Wide, 1 Dm
7h 02m 18.43s +12° 34' 54.2" P.A. 247.00 sep 38.5 mag 7.29,8.67 Sp A2 dist. 165.56 pc (540.06 l.y.)

HO342 AB: 152; 175x: Amazingly fine hairline split, slight magnitude difference, white stars. 
07h 02m 50.54s +13° 05' 21.7" P.A. 89.00 sep 1.2 mag 7.99,8.71 Sp F5 dist. 212.31 pc (692.56 l.y.)

ENG 28 AB: 152; 175x: Super-wide white stars, slight magnitude difference.  Parallax indicates they are physical but I doubt they are close enough together to be gravitational.
07h 08m 00.24s +15° 31' 42.9" P.A. 99.00 sep 171.9 mag 7.86,7.74 Sp G0V dist. 46.75 pc (152.5 l.y.)

STF1027 AB: 152; 175x: Near equal, light orange stars, around 6"
07h 08m 46.74s +16° 54' 31.8" P.A. 356.00 sep 6.9 mag 8.47,8.69 Sp K3III dist. 312.5 pc (1019.38 l.y.)

WEI14 AB: 152; 175x: Wow! Very fine, 1 Dm, just split.
07h 12m 48.16s +15° 10' 41.9" P.A. 160.00 sep 2.1 mag 7.77,8.91 Sp B9.5IV dist. 1351.35 pc (4408.1 l.y.)

STF1088 AB: 152; 175x: White stars, 2 Dm
07h 26m 02.42s +14° 06' 10.7" P.A. 195.00 sep 10.9 mag 7.38,9.37 Sp A0V dist. 458.72 pc (1496.34 l.y.)

H5 63 AB: 152; 175x: Wide, 2 Dm.  Not physical
09h 58m 39.35s +10° 57' 37.4" P.A. 348.00 sep 49.4 mag 7.47,11.68 Sp F0III dist. 83.47 pc (272.28 l.y.)

STT216 AB: 152; 175x: White A and B is a very faint close companion. 315-year period nearing apastron
10h 22m 43.81s +15° 20' 39.7" P.A. 228.20 sep 2.3 mag 7.38,10.28 Sp G5 dist. 28.77 pc (93.85 l.y.)

STF1431 AB: 152; 175x: White and 2 Dm, fairly close.
10h 25m 35.12s +08° 46' 35.4" P.A. 76.00 sep 3.6 mag 7.76,9.07 Sp A8III dist. 151.98 pc (495.76 l.y.

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