Tuesday, March 11, 2025

8 march 2025

A short night with the 6-inch.  Better than average seeing, but with poor transparency.  I ran into some difficulties with the setting circles (low battery), so I only observed a couple double stars before just pointing the scope at the moon.  

STF1348 AB: 152; 180x: Lovely near equal pair, well split, best seen medium power.  28% PRO, 122 AU WS, 1.4+1.4 Msol, and a positive PMV.  It is probably binary, SOC grade 4 orbit 4734-year period, on the long side if confirmed as a binary.
09h 24m 28.48s +06° 21' 01.8" P.A. 314.00 sep 2.0 mag 7.45,7.57 Sp F7V dist. 71.17 pc (232.16 l.y.)
STF1356 AB: 152; 250x: Ome Leo.  Unequal stars, hairline split, B appears blue.  No Gaia data.  SOC grade 2 orbit, 118-year period, it is nearing apastron and won't make much change the next 20 years.
09h 28m 27.41s +09° 03' 24.4" P.A. 116.00 sep 0.9 mag 5.69,7.28 Sp F9IV dist. 33.17 pc (108.2 l.y.)
STF1536 AB: 152; 180x: Nice close split, light yellow stars, 2 Dm.  No Gaia parallax data.  SOC grade 2 orbit, 184-year period, it will widen slightly and turn from due east to ENE by 2040.
11h 23m 55.37s +10° 31' 46.9" P.A. 92.00 sep 2.3 mag 4.06,6.71 Sp F4IV dist. 23.67 pc (77.21 l.y.)

No comments:

Post a Comment