Saturday, February 1, 2020

31 January 2020

Finally, a (mostly) clear night.  There were still some high clouds at dusk when I opened up the observatory.  The primary was half dewed-over, in the area away from the 12v lightbulb I put behind the mirror a couple weeks ago.  The fans soon cleared up the dew.  (When I closed last night I set both a bulb and a fan on the mirror, hopefully that will help.)

I looked at the moon for a while using binoviewers.  Seeing was good enough to use the 10mm eyepiece, and full aperture (267x).  There were many interesting features however my moon atlas was in the house and I didn't retrieve it.  After an hour or so I slewed to Uranus, which was just a few degrees away, and was easy to find as a light blue orb with a tan color sash along one limb.

I went back outside at nearly 9:00pm, and went in on doubles.  Seeing was uneven, and I had my cleanest views with the 8-inch mask on and only 333x.  Transparency was poor, with a haze showing around the moon -- all of which limited me to brighter pairs.  Conditions seemed to improve somewhat after 10pm, but I eventually tired out at 11pm and packed in.  The forecast was for more clouds building overnight, so I didn't feel bad.

BU 1008 AB; 203; 333x; Propus. Yellow A and blue-yellow B, 2 delta mag, 1.5" very nice
06h 14m 52.69s +22° 30' 24.6" P.A. 251.7 sep 1.61 mag 3.52,6.15 Sp M3.5I-II dist. 117.92 pc (384.66 l.y.)

STT 143 AB; 203; 333x: Very pretty yellow-white A star with blue-white B, 3 delta mag., well split.
06h 31m 09.99s +16° 56' 19.0" P.A. 103 sep 7.9 mag 6.20,10.10 Sp K2III

J 1956 AB; 203; 333x: Faint but wide pair, blue color due to faintness, one more visible than other. Seems in a string of three [not physical]
06h 33m 02.93s +17° 05' 11.7" P.A. 60 sep 9.8 mag 9.50,9.90

STF 932 AB; 203; 333x: Very neat near equal white stars, well split.
06h 34m 21.57s +14° 45' 08.3" P.A. 299.1 sep 1.61 mag 8.31,8.54 Sp F5 dist. 80.06 pc (261.16 l.y.)

J 273 AB; 203; 333x: Near equal white, pretty wide.
06h 55m 18.52s +12° 35' 07.0" P.A. 340 sep 4.4 mag 9.91,10.34 Sp G1V

STF 982
AB; 203; 333x: 38 Gem. Light yellow A and blue B, quite wide, very pretty. AC much wider separation much fainter not noticed.
06h 54m 38.63s +13° 10' 40.1" P.A. 142.4 sep 7.33 mag 4.75,7.80 Sp F0Vp dist. 25.63 pc (83.61 l.y.)

STF 899 AB: 203; 333x: Near equal, rather wide, one a little yellow the other light blue-white
06h 22m 49.64s +17° 34' 27.3" P.A. 17 sep 2.2 mag 7.41,8.01 Sp A0V dist. 325.73 pc (1062.53 l.y.)

AG 109 AB; 203; 333x: Very nice, half delta mag, nicely split white stars. Very good
06h 19m 44.83s +21° 28' 27.7" P.A. 16 sep 2.4 mag 9.44,9.67 Sp G0

J 686 AB; 203; 333x: Very fine pair, near equal to half delta mag white stars, nicely separated but pleasingly close pair
06h 17m 26.20s +22° 25' 37.0" P.A. 49 sep 2.3 mag 10.48,10.67 Sp B8

AG 323
AB; 203; 333x: Wow! pops with seeing, 1 delta mag, ~2". Very nice. Two other stars much fainter on the outer reaches likely part of system [these are AC and AD]
06h 19m 45.23s +22° 06' 38.8" P.A. 49 sep 1.8 mag 9.04,10.21 Sp B1V:p dist. 543.48 pc (1772.83 l.y.)

OL 67 AB: 203; 333x: Averted vision only, wide, pops with seeing, just able to see it.
06h 23m 00.44s +22° 13' 12.8" P.A. 39 sep 5.2 mag 10.90,11.90

STT 140 AB: 203; 333x: Nice 3 delta mag pair, wide, clean with seeing, bluish stars.
06h 26m 37.73s +15° 31' 25.3" P.A. 119 sep 3 mag 6.92,10.08 Sp B9.5IV dist. 337.84 pc (1102.03 l.y.)

STT 141 AB: 203; 333x: Beautiful blue-white A star and 2 delta mag B, nice split, ~2.5"
06h 30m 01.34s +17° 54' 23.8" P.A. 144 sep 2.3 mag 7.69,9.78 Sp A0

HO 27 AB: 203; 333x: Nice near equal, though mag difference is notable. Third slightly brighter a bit further out [this is AC, 9.64/9.71 23"]
06h 56m 03.65s +20° 05' 03.2" P.A. 127 sep 3.7 mag 9.64,10.08 Sp A2

STT 170 AB: 203; 333x: Notched, near equal at 333x. At 667x, hairline split very easy to see, near equal white stars.
07h 17m 38.51s +09° 17' 31.5" P.A. 288.8 sep 0.55 mag 7.37,7.67 Sp G0IV-V dist. 41.61 pc (135.73 l.y.)

A 2862 AB: 203; 333x: Very close, less than one disk width, 2 delta mag, light orange stars. Tough. Can't see B star at 667x.
07h 20m 02.62s +03° 46' 36.5" P.A. 62 sep 0.8 mag 8.36,9.58 Sp K0 dist. 735.29 pc (2398.52 l.y.)

A 2863 AB: 203; 333x: White near equal, very fine pair in dense field.
07h 20m 09.95s -00° 01' 11.5" P.A. 288 sep 1.2 mag 9.29,9.46 Sp A3

STF 1074 AB: 203; 333x: Very nice, touching disks to hairline. White, near equal. Great! [There are three other fainter BU pairs not noticed.]
07h 20m 31.07s +00° 24' 13.1" P.A. 172 sep 0.8 mag 7.44,7.80 Sp B9.5V dist. 228.31 pc (744.75 l.y.)

STF 1076 AB: 203; 333x: Very fine near equal white stars, well split.
07h 21m 01.96s +04° 03' 23.6" P.A. 108 sep 2.9 mag 9.49,9.58 Sp A0

STF 1095 AB: 203; 333x: White stars, wide, 1 delta mag.
07h 27m 22.75s +08° 45' 14.0" P.A. 78 sep 10.3 mag 8.61,9.35 Sp A2 dist. 729.93 pc (2381.03 l.y.)

BRD 2 AB: 203; 333x: Wow! Exceptionally fine pair, white, near equal, nicely split, just outside of Procyon's glare. Great! [AB,C 14th mag not seen]
07h 39m 46.65s +05° 16' 25.5" P.A. 188 sep 0.9 mag 9.22,9.53 Sp A5

STF 1126 AB: 203; 333x: A bit more delta mag than listed, split, white, rather bright pair
07h 40m 06.99s +05° 13' 51.9" P.A. 178 sep 0.82 mag 6.55,6.96 Sp A0III

AG 143 AB: 203; 333x: Pretty orange and blue, light colors, wide, faint
07h 41m 10.49s +01° 08' 18.1" P.A. 98 sep 5.7 mag 9.10,10.10 Sp G5

STF 1137
AB: 203; 333x: Light orange and blue, pretty wide, 1.5 delta mag.
07h 46m 35.35s +04° 07' 50.1" P.A. 133 sep 2.9 mag 7.96,9.12 Sp F5 dist. 440.53 pc (1437.01 l.y.)

STT 182
AB: 203; 333x: Compact white pair, more near equal than Sky Tools says, white, easy split.
07h 52m 42.12s +03° 23' 02.2" P.A. 9 sep 0.9 mag 7.82,7.93 Sp A2 dist. 210.08 pc (685.28 l.y.)

STF 1182
AB: 203; 333x: A white, B a little ruddy, wide, 2 delta mag.
08h 05m 24.43s +05° 49' 38.9" P.A. 75 sep 4.9 mag 7.48,8.76 Sp B9 dist. 328.95 pc (1073.03 l.y.)

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