12 march 2021

Many local observers headed out to various observing sites last night, it being probably the only remaining clear night the rest of this new moon period.  I decided to stay home to spend time with family, and besides I didn't like the looks of the satellite images which showed considerable amounts of moisture headed our way.  This was mostly correct, as transparency was on the poor side and marine clouds drifted in by 10:30pm.

Seeing was not very good either so I stayed at 7-inches the whole session.  Some nice pairs, as usual, including a short period pair!

STF1366 AB: 178; 205x: This one is a 2 delta magnitude pair, about 8", pretty wide.  Physical.  There is another wide near equal pair to the east about 30" away.
09h 35m 42.47s +53° 17' 40.4" P.A. 321.00 sep 7.8 mag 8.44,10.09 Sp F2 dist. 95.51 pc (311.55 l.y.)

STF1376 AB: 178; 205x: Clean white pair, near equal, wide about 5".  Physical.  14th mag BC not seen.

09h 45m 01.10s +43° 13' 39.8" P.A. 309.00 sep 5.4 mag 9.07,9.05 Sp F5V dist. 130.38 pc (425.3 l.y.)

HU 630 AB: 178; 205x: Very fine pair, difficult in poor seeing and transparency, slight magnitude difference, about 2".  Physcial
09h 47m 36.09s +50° 57' 17.3" P.A. 74.00 sep 2.2 mag 9.43,9.58 Sp G5 dist. 224.22 pc (731.41 l.y.)

STF1381 AB: 178; 205x: Finest split with seeing, very small scale at this magnification, light orange star, very significant magnitude difference.  Physical with a 1787.6479-year period, this is actually one to watch because it is rapidly nearing periastron and will tighten over the next couple of decades.
09h 51m 15.22s +60° 37' 00.1" P.A. 184.30 sep 0.8 mag 8.93,9.20 Sp G0 dist. 190.11 pc (620.14 l.y.)

STT 208 AB: 178; 333x: Tough in poor seeing and transparency.  Bright white A, significant delta magnitude, B's PA a little north of west.  There are three stars in a wide triangle in the field, B points to base line. Physical with 104.6-year period, it will widen slightly and will reach apastron by 2040.
09h 52m 06.36s +54° 03' 51.4" P.A. 313.70 sep 0.4 mag 5.28,5.39 Sp A2V dist. 156.01 pc (508.9 l.y.)

STT 209 AB: 178; 205x: Light yellow-orange A, B is very much fainter about 3 delta mag, wide about 5".  Physical. 
09h 53m 17.23s +50° 37' 16.3" P.A. 309.00 sep 4.9 mag 7.41,10.31 Sp G8IV dist. 196.85 pc (642.12 l.y.)

STF1394 AB: 178; 205x: White stars, >1 delta mag, wide about 5".  Physical. 
09h 57m 14.57s +45° 54' 10.1" P.A. 250.00 sep 4.5 mag 8.89,9.75 Sp G0 dist. 58.11 pc (189.55 l.y.)

STT 210 AB: 178; 205x: Excellent fine pair, with seeing, light yellow-orange, 1 delta mag, split but very close.  
10h 02m 35.64s +46° 21' 42.5" P.A. 257.00 sep 1.3 mag 8.52,9.07 Sp G5 dist. 228.83 pc (746.44 l.y.)

STF1425 AB: 178; 205x: Faint pair, about 1 delta, wide about 5".  Physical.
10h 21m 34.14s +46° 09' 07.6" P.A. 358.00 sep 4.8 mag 9.89,10.74 Sp F5 dist. 144.51 pc (471.39 l.y.)

STF1427 AB: 178; 205x: White stars, typical Struve, not quite 1 delta mag, wide
10h 22m 00.53s +43° 54' 19.3" P.A. 215.00 sep 9.3 mag 8.18,8.54 Sp F5V dist. 105.04 pc (342.64 l.y.)

STF1428 AB: 178; 205x: An attractive pair, clean white stars about 1 delta mag and 3".  Physical.
10h 25m 59.00s +52° 37' 18.3" P.A. 89.00 sep 2.8 mag 8.02,8.44 Sp F6V dist. 87.11 pc (284.15 l.y.)

STF1436 AB: 178; 205x: Slightly dimmer than a typical Struve, about 2 delta mag, very wide
10h 30m 22.86s +56° 21' 20.0" P.A. 254.00 sep 10.5 mag 8.78,10.39 Sp F5 dist. 99.6 pc (324.9 l.y.)

STF1460 AB: 178; 205x: Very pretty near equal pair of white stars, well separated about 5".  Not physical.
10h 40m 35.04s +42° 09' 11.6" P.A. 161.00 sep 3.9 mag 8.72,8.90 Sp F2 dist. 185.87 pc (606.31 l.y.)

STF1462 AB: 178; 205x: White A, very faint B, wide.
10h 42m 52.23s +50° 47' 57.3" P.A. 174.00 sep 8.3 mag 7.41,10.10 Sp A8IV dist. 129.2 pc (421.45 l.y.)

STF1463 AB: 178; 205x: Dim pair, significant magnitude difference, white, fairly wide.  Physical. 
10h 42m 54.25s +46° 41' 25.2" P.A. 258.00 sep 7.9 mag 9.30,10.42 Sp G5

STF1465 AB: 178; 205x: Faint pair, considerable magnitude difference, fairly wide
10h 43m 13.35s +44° 37' 41.6" P.A. 11.00 sep 2.2 mag 9.79,10.10 Sp K2

STF1467 AB: 178; 205x: Nice!  Very faint B, around 2 delta mag, pretty wide.  I can just see B with direct vision and hold it in poor transparency.  Physical.  
10h 45m 15.60s +44° 58' 11.2" P.A. 288.00 sep 3.9 mag 8.58,10.76 Sp K0III dist. 239.23 pc (780.37 l.y.)

STF1510 AB: 178; 205x: >1 delta mag, wide pair.  Physical with a 3156.3519-year period 
11h 08m 00.06s +52° 49' 17.9" P.A. 327.80 sep 5.6 mag 7.65,9.03 Sp F8V dist. 55.96 pc (182.54 l.y.)

HO 50 AB: 178; 205x: Cream white A and can see B nicely separated, about 3".  Used averted vision at first to see B, then could hold direct after foveal coaxing.
11h 13m 40.09s +41° 05' 19.8" P.A. 35.00 sep 3.0 mag 6.47,8.36 Sp K2III dist. 114.03 pc (371.97 l.y.)

STF1520 AB: 178; 205x: Wide 2 delta mag, light yellow A and a distinctly blue B.  Physical.
11h 16m 04.03s +52° 46' 23.4" P.A. 344.00 sep 12.4 mag 6.54,7.81 Sp F6V+F9V dist. 34.12 pc (111.3 l.y.)

STF1384 AB: 178; 205x: Faint pair, near equal, wide
09h 49m 56.91s +16° 19' 55.8" P.A. 182.00 sep 11.8 mag 9.76,10.02 Sp G0

STF1389 AB: 178; 205x: White stars, around 1 delta mag, well separated.  Physical with a 1454-year period

09h 52m 26.17s +26° 58' 53.8" P.A. 289.40 sep 2.5 mag 9.12,9.50 Sp K0 dist. 57.54 pc (187.7 l.y.)