Wednesday, August 6, 2025

4 august 2025

Some warning weather and with it an offshore wind to keep the marine layer marine.  Seeing was good for the 6-inch so that's what I used.  The sky was still hazy, so fainter stars were more difficult to see.  Only had an hour and a half out, but it felt nice to be back in the habit.  I have already observed almost all the CDSA list in the summer sky, so I switched to the Burnham list for many of the observations. 

BU 56 AB: 152; 250x: Excellent close pair, 1 Dm, just split with seeing.  2% PRO, 101 AU WS, 1.1+1.3 Msol, it is possibly binary and needs an orbit tried.
20h 05m 07.26s -04° 18' 29.3" P.A. 189.00 sep 1.3 mag 8.01,9.10 Sp F5 dist. 77.46 pc (252.67 l.y.)

BU 60 AB: 152; 175x: Bright white A and very faint close B. 60% PRO, 712 AU WS, 4.2+2.0 Msol, but 0.01 PMV.  It might be binary, and orbit can be tried.
20h 27m 19.20s -18° 12' 42.1" P.A. 148.00 sep 3.5 mag 5.13,8.53 Sp B8II-III dist. 167.22 pc (545.47 l.y.)

BU 62 AB: 152; 250x: Very finely split faint stars, near equal.  -18% PRO, 607 AU WS, 2.8+2.3 Msol, it is not likely binary.
20h 28m 00.64s +30° 08' 02.6" P.A. 133.00 sep 1.2 mag 8.70,9.79 Sp A0

BU 67 AB: 152; 250x: Overlapping disks, large Dm.  -8% PRO, 181 AU WS, 2.2+1.1 Msol, low 0.06 PMV, it is not likely binary.
20h 50m 36.05s +30° 54' 45.7" P.A. 311.00 sep 1.5 mag 6.85,9.87 Sp A8III dist. 120.05 pc (391.6 l.y.)

BU 68 AB: 152; 175x: Faint, unequal stars, closely split.  -10% PRO, 352 AU WS, 0.09 PMV, it is not likely binary.
20h 59m 28.27s +50° 12' 41.0" P.A. 149.00 sep 2.0 mag 9.20,9.68 Sp A5 dist. 184.16 pc (600.73 l.y.)

BU 154 AB: 152; 175x: Split with low power, better view higher, unequal, fairly close split.  60% PRO, 527 AU WS, 1.7+1.4 Msol, and RVD 1.0 < EV 3.2, 0.09 PMV.  It is likely binary (as opposed to StelleDoppie) and needs an orbit.
20h 52m 49.68s -16° 09' 54.5" P.A. 61.00 sep 3.0 mag 8.97,9.97 Sp G2V dist. 247.52 pc (807.41 l.y.)

BU  249 AB: 152; 250x: With seeing and high power only, white stars, large delta, very fine split.  No Gaia parallax data for companion.  Given how close it is, an orbit should be tried.
19h 38m 21.68s +00° 20' 43.6" P.A. 106.00 sep 0.8 mag 7.40,9.41 Sp A7IV dist. 106.16 pc (346.29 l.y.)

BU  423 AB: 152; 250x: Very faint, near equal, hazy view, with seeing.  93% PRO, 363 AU WS, 2.2+2.5 Msol, 0.05 PMV, it is possibly binary and needs an orbit.
19h 27m 51.67s -29° 29' 55.3" P.A. 127.00 sep 1.2 mag 8.58,8.89 Sp G0 dist. 251.26 pc (819.61 l.y.)

BU 425 AB: 152; 175x: Very fine split, near equal.  -20% PRO, it is not likely binary.
19h 57m 32.28s +20° 17' 40.1" P.A. 240.00 sep 1.4 mag 9.17,9.24 Sp B9 dist. 540.54 pc (1763.24 l.y.)

BU 442 AB: 152; 125x: Rich field in finder and main scope, arc of three stars.  42% PRO, 8,641 AU WS, 4.7+3.4 Msol, there is some chance it is binary, can orbit can be tried.
20h 16m 29.84s +37° 38' 35.4" P.A. 103.00 sep 18.3 mag 9.72,8.04 Sp B0III

BU 1475 AB: 152; 125x: Light orange A and well split B, 2 Dm.  66% PRO, 6,920 AU WS, 5.2+3.1 Msol, but RVD 2.6 > EV 1.5, it is not binary
19h 57m 53.70s -09° 03' 30.3" P.A. 113.00 sep 10.4 mag 7.77,9.47 Sp K2 dist. 247.52 pc (807.41 l.y.)

BU 1478 AB: 152; 125x: Wide B with averted vision only, compared to bright white A.   -70% PRO, it is not binary.
20h 03m 49.62s +14° 58' 58.8" P.A. 170.00 sep 28.6 mag 7.00,11.43 Sp G0Ia dist. 2380.95 pc (7766.66 l.y.)

H N 119 AB: 152; 125x: Bright yellow A and well split, faint 2 Dm light orange B.  64% PRO, 641 AU WS, 2.7+1.1 Msol, but RVD 3.9 > EV 3.3, and there is a low PMV 0.01, it is not likely binary.
19h 29m 52.18s -26° 59' 08.2" P.A. 144.00 sep 7.5 mag 5.61,8.82 Sp K2III dist. 71.74 pc (234.02 l.y.)

S 715 AB: 152; 125x: Wide 1 Dm white stars, seems to lie on the edge of a star field or open cluster.  55% PRO, 1165 AU WS, 2.3+1.9 Msol, but a slightly negative -0.08 PMV, it is possibly binary and needs an orbit.
19h 17m 39.96s -15° 58' 01.7" P.A. 17.00 sep 8.4 mag 7.07,7.90 Sp A3V dist. 132.8 pc (433.19 l.y.)

SCJ 22 AB: 152; 250x: Split with 125x, better seen with 175x & 250x.  Light yellow near equal close split.  -46% PRO, it should not be binary, but it is only 34 AU WS, 0.9+0.9, and a SOC grade 2 orbit.  Parallax may be error prone at near distances?  167-year period.
19h 28m 12.26s -12° 08' 40.7" P.A. 296.00 sep 1.2 mag 8.12,8.69 Sp G8V dist. 36.62 pc (119.45 l.y.)

STF2504 AB: 152; 125x: Lovely well split pair, 2 Dm, white A and light-yellow B.  13% PRO, 542 AU WS, 1.6+1.0, RVD 1.8 < EV 2.9, and 0.06 PMV, it is possibly binary and needs an orbit.
19h 20m 59.85s +19° 08' 43.4" P.A. 282.00 sep 8.7 mag 7.00,9.03 Sp F5V dist. 62.7 pc (204.53 l.y.)

STFB 10 A: 152; 125x:  Altair.  Very wide, need to pan scope.  No Gaia parallax data, anyone's guess.
19h 50m 46.99s +08° 52' 05.9" P.A. 286.00 sep 195.8 mag 0.95,9.82 Sp A7V dist. 5.13 pc (16.73 l.y.) 

No comments:

Post a Comment