Saturday, September 21, 2024

20 september 2024

A pretty good night with the 6-inch refractor.  Transparency was average, gradually getting more hazy by 11pm.  Seeing started out poor but improved by 10pm, and was good at higher elevations.  Spent most of the time chasing CDSA pairs in Andromeda, then viewed Saturn near culmination, and then the moon after it cleared the neighbor's roof.

AC 1 AB: 152; 125x: Lovely half delta magnitude off-white pair, closely separated.  4.2' to the SSW is the equally bright (7.3 magnitude) HD 1632, a fine orange star.  -65% PRO, it is not binary, in spite of the SOC grade 4 orbit.
00h 20m 54.10s +32° 58' 40.9" P.A. 291.00 sep 1.9 mag 7.27,8.26 Sp F5V dist. 67.93 pc (221.59 l.y.)

BU  397 AB: 152; 125x: Light orange A, and wide, nearly 2 Dm faint B seen directly but on the edge of needing averted vision. -54% PRO, it is not binary.
01h 07m 49.57s +46° 50' 31.6" P.A. 142.00 sep 8.7 mag 7.54,10.25 Sp K0II-IIIp dist. 172.71 pc (563.38 l.y.)

BU  997 AB: 152; 125x: 2 Dm, closely separated, white.  45% PRO, 290 AU WS, 1.5+0.9 Msol, it is possibly binary and needs an orbit.
00h 04m 57.53s +45° 40' 25.6" P.A. 338.00 sep 3.8 mag 7.64,9.39 Sp F8IV-V dist. 71.12 pc (231.99 l.y.)

H 5 17 AB: 152; 125x: Brilliant white A and wide faint B.  56% PRO, 6,302 AU WS, 4.8+1.8 Msol, it might be binary and an orbit should be tried.
00h 36m 52.84s +33° 43' 09.7" P.A. 175.00 sep 36.2 mag 4.36,7.08 Sp B5V dist. 183.49 pc (598.54 l.y.)

HJ 1947 AB: 152; 250x: Bright white A, very faint 3-4 Dm B which I can only hold after foveal coaxing, and with higher powers only, though it is a wide separation.  27% PRO, 888 AU WS, but the RVD 3.2 > EV 2.6, it is not binary.
00h 16m 21.50s +43° 35' 42.4" P.A. 76.00 sep 8.3 mag 6.16,9.83 Sp A2VpSi dist. 106.5 pc (347.4 l.y.)

HJ 5451 AB: 152; 125x: Faint pair, wide, nearly 1 Dm.  -13% PRO, it is not binary.
00h 31m 25.64s +33° 34' 53.9" P.A. 86.00 sep 55.3 mag 6.01,9.34 Sp K1III dist. 116.14 pc (378.85 l.y.)

MAD 1 AB: 152; 250x: Hairline split with seeing, unequal.  -11% PRO, 1.8% error.  179 AU WS, 2.5+1.9 Msol, it is possible this isn't binary.  SOC grade 5 orbit, 925-year period.  It has only a 0.02 proper motion vector -- I predict this will turn out not to be binary.
01h 00m 35.58s +47° 19' 14.6" sep 0.9 mag 7.66,9.05 Sp A2

STF 3 AB: 152; 125x: White stars, nearly 1 Dm, wide.  -62% PRO, it is not binary.
00h 10m 03.18s +46° 23' 25.1" P.A. 83.00 sep 5.1 mag 7.84,9.08 Sp A4V dist. 149.7 pc (488.32 l.y.)

STF 19 AB: 152; 175x: 2 Dm, closely separated.  44% PRO, 312 AU WS, 2.2+1.3 Msol, it is possibly binary and needs an orbit.
00h 16m 43.02s +36° 37' 47.4" P.A. 140.00 sep 2.3 mag 7.12,9.48 Sp A2V dist. 126.42 pc (412.38 l.y.)

STF 28 AB: 152; 125x: Wide, faint. -68% PRO, it is not binary.
00h 23m 53.23s +29° 30' 09.1" P.A. 224.00 sep 33.0 mag 8.32,8.55 Sp F7V+F8V dist. 71.89 pc (234.51 l.y.)

STF 47 AB: 152; 125x:  Wide 1.5 Dm pair.  -68% PRO, it is not binary.  A faint, 11th magnitude star, more widely separated, forms an arc with the other two--but doesn't share parallax with either of them.
00h 40m 19.78s +24° 03' 14.0" P.A. 206.00 sep 16.2 mag 7.25,8.82 Sp A4III dist. 131.58 pc (429.21 l.y.)

STF 52 AB: 152; 250x: Split at 125x, better seen 250x, closely separated, nearly 1 Dm, off-white stars. -62% PRO, it is not binary.
00h 44m 11.27s +46° 14' 08.2" P.A. 2.00 sep 1.4 mag 7.87,8.95 Sp F6V dist. 117.51 pc (383.32 l.y.)

STF 73 AB: 152; 175x: Light orange stars, 1 Dm, closely split.  No Gaia parallax data.  SOC grade 2 orbit, 167.5-year period.
00h 54m 58.02s +23° 37' 42.4" P.A. 335.00 sep 1.2 mag 6.12,6.54 Sp K1IV dist. 37.98 pc (123.89 l.y.)
STF 79 AB: 60; 40x: White stars, nearly 1 Dm, wide.  29% PRO, 1,165 AU WS, 2.9+2.4 Msol, it is possibly binary.  SOC grade 5 orbit, 9,100-year period! 
01h 00m 03.56s +44° 42' 47.7" P.A. 194.00 sep 7.9 mag 6.04,6.77 Sp B9.5V+A2V dist. 119.05 pc (388.34 l.y.)

STT  11 AB: 152; 125x: Very wide, equal.  -15% PRO and 29,447 AU WS, it is not binary.
00h 30m 39.88s +32° 08' 11.4" P.A. 317.00 sep 197.6 mag 7.57,7.70 Sp F2 dist. 157.48 pc (513.7 l.y.)

STT  21 AB: 152; 250x: Excellent pair, appears to be 2 Dm, very closely split.  -55% PRO, it is not binary, in spite of the SOC grade 5 orbit.
01h 03m 01.54s +47° 22' 34.1" P.A. 175.00 sep 1.4 mag 6.76,8.07 Sp A9IV dist. 96.06 pc (313.35 l.y.)

STT 29 AB: 152; 125x: Very wide B seen with averted vision only.  -40% PRO, it is not binary.
01h 18m 53.15s +39° 57' 48.0" P.A. 265.00 sep 20.3 mag 7.40,11.80 Sp G5 dist. 156.74 pc (511.29 l.y.)

STT 514 AB: 152; 125x: Bright white A, 3 Dm B, close separation at low power.  -31% PRO, it is not binary.
00h 04m 36.60s +42° 05' 33.2" P.A. 170.00 sep 5.1 mag 6.16,9.65 Sp B9III dist. 386.1 pc (1259.46 l.y.)

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