Saturday, July 13, 2024

7 july 2024

Had a pretty good night with the 6-inch.  Seeing was variable, sometimes choppy and sometimes ok after waiting a couple minutes for it to settle down.  Viewed several challenging pairs in the mix.  Observed for 90 minutes.

It will be clear the rest of this week.  I'll probably observe with the 6-inch again tonight and hope seeing is good enough for the 20-inch mid-week.

GNT   1 AB: 152; 200x: Antares.  With green filter, B is just separated and very much fainter.  No Gaia data.  SOC grade 5 orbit, 2666-year period, it might not turn out to be binary.
16h 29m 24.47s -26° 25' 55.0" P.A. 277.00 sep 2.7 mag 0.96,5.40 Sp M1 dist. 169.78 pc (553.82 l.y.)

BU  121 AB: 152; 200x: Extremely fine near equal light orange stars.  64% PRO, 308 AU WS, 1.8+1.8 Msol, RVD 0 < EV 4.6, it is very likely binary and needs an orbit.  
15h 39m 36.36s -27° 38' 35.5" P.A. 284.00 sep 2.0 mag 8.41,8.46 Sp A2/3IV/V dist. 159.74 pc (521.07 l.y.)

BU  354 AB: 152; 125x: Well separated 1 Dm pair.  -26% PRO, it is not binary.
15h 43m 11.57s -25° 24' 56.2" P.A. 291.00 sep 5.9 mag 7.31,9.30 Sp F1V dist. 126.26 pc (411.86 l.y.)
 
I 977 AB: 152; 380x: I can tell it's double at 250x, at 380x, at best moments, I see overlapping disks, 1 Dm. No Gaia data for the secondary.  SOC grade 4 orbit, 274.5-year period, it will make little change in the next 20 years.
15h 55m 41.93s -26° 44' 49.3" P.A. 264.00 sep 0.6 mag 7.99,8.48 Sp F7V dist. 75.53 pc (246.38 l.y.)
BU   38 AB: 152; 200x: White A, 2 Dm companion well separated.  No Gaia data for the secondary.  An orbit should be tried just to see whether it could be binary.
16h 02m 51.95s -25° 00' 51.6" P.A. 343.00 sep 4.5 mag 7.17,9.45 Sp B9.5V dist. 265.96 pc (867.56 l.y.)

HJ 4839 AB: 152; 200x: White and well separated, 3 Dm companion.  -23% PRO, it is not binary.
16h 12m 16.05s -28° 25' 01.9" P.A. 69.00 sep 3.8 mag 5.80,8.13 Sp B9Vv dist. 93.02 pc (303.43 l.y.)

SHJ 225 AB: 60; 25x: Wide 1 Dm.  19% PRO, 6,083 AU WS, 2.1+1.7 Msol, and RVD 0.6 < EV 1.1, it might be binary and an orbit should be tried.
16h 20m 05.49s -20° 03' 23.0" P.A. 333.00 sep 47.1 mag 7.39,8.08 Sp B9 dist. 172.71 pc (563.38 l.y.)

BU 1116 AB: 152; 250x: Need very best seeing, and foveal coaxing, and can just barely hold B with direct vision, close split.  4% PRO, 190 AU WS, 2.0+1.0 Msol, it is possibly binary and needs an orbit tried.
16h 44m 17.40s -27° 27' 22.4" P.A. 20.00 sep 2.4 mag 6.58,10.15 Sp A2V dist. 95.97 pc (313.05 l.y.)

SHJ 243 AB: 152; 125x: Near equal, well separated, bright, light orange stars.  No Gaia data.  SOC grade 4 orbit, 470.9-year period, it might or might not be binary.
17h 15m 20.78s -26° 36' 06.1" P.A. 138.00 sep 5.1 mag 5.12,5.12 Sp K5Ve+K1V dist. 5.93 pc (19.34 l.y.)

H 1  35 AB: 152; 125x: Wide, 2 Dm.  -6% PRO, it is not binary.
17h 17m 39.53s -26° 37' 44.6" P.A. 337.00 sep 5.8 mag 6.94,9.09 Sp B9.5V dist. 156.01 pc (508.9 l.y.)

BU 1089 AB: 152; 250x: With calmest of seeing, B hardens from a haze to a point, light orange stars, very tough, very large delta magnitude.  No Gaia parallax data for the secondary.  Given the difficulty, an orbit should be tried.
17h 29m 47.34s -05° 55' 10.1" P.A. 321.00 sep 1.4 mag 6.57,8.98 Sp G8IV dist. 78.99 pc (257.67 l.y.)

SHJ 251 AB: 80; 24x: Superwide, finder observation, 1 Dm.  14% PRO, 11,534 AU WS, 2.5+1.7 Msol, but RVD 2.1 > EV 0.8, it is not binary.
17h 39m 08.48s +02° 01' 41.2" P.A. 328.00 sep 111.3 mag 6.37,7.78 Sp K0III dist. 112.99 pc (368.57 l.y.)

HJ 2814 AB: 152; 125x: Wide, white stars, 3 Dm.  -63% PRO, it is not binary.
17h 56m 19.04s -15° 48' 44.5" P.A. 157.00 sep 20.6 mag 5.93,9.16 Sp A1V dist. 73.96 pc (241.26 l.y.)

HU  189 AB: 152; 250x: Excellent pair, very finely split, 2 Dm.  -15% PRO, it is not binary.
17h 53m 05.03s -13° 39' 00.9" P.A. 256.00 sep 1.5 mag 7.41,8.99 Sp F8V dist. 62.93 pc (205.28 l.y.)

PZ 6 AB: 152; 125x: Light orange A and blue B, wide, 2 Dm.  28% PRO, 4,002 AU WS, 9.9+5.5 Msol, it could be binary and an orbit should be tried. 
17h 59m 05.28s -30° 15' 10.8" P.A. 104.00 sep 5.9 mag 5.39,6.96 Sp M1Ib+G8II dist. 310.56 pc (1013.05 l.y.)

H 6 2 AC: 152; 125x: Very faint B to bright A, super wide.  53% PRO, 37,302 AU WS, 10.6+3.8 Msol, it is far too wide to be gravitationally bound.
18h 00m 38.72s +02° 55' 53.7" P.A. 143.00 sep 54.7 mag 3.96,8.06 Sp B5I+B2V dist. 377.36 pc (1230.95 l.y.)

BU  244 AB: 152; 250x: With best seeing, 2 Dm B hardens to a point, closely split.  -76% PRO, it is not binary.
18h 08m 34.75s -27° 51' 51.1" P.A. 270.00 sep 2.2 mag 7.61,9.06 Sp G6III-IV dist. 284.9 pc (929.34 l.y.)

BU  637 AB: 152; 200x: Bright light yellow A, wide faint B, well split.  42% PRO, 330 AU WS, 1.8+0.4 Msol, but RVD 5.0 > EV 3.5, it is not binary.
18h 09m 54.01s +03° 07' 13.1" P.A. 191.00 sep 7.2 mag 5.69,11.70 Sp F6V+K3 dist. 46.93 pc (153.09 l.y.)

BU  245 AB: 152; 125x: White A, 3 Dm B resolves from haze to point with seeing.  90% PRO, 512 AU WS, 3.2+1.7 Msol, RVD 3.0 < EV 4.1, it is very likely binary and needs an orbit.
18h 10m 05.81s -30° 43' 43.3" P.A. 345.00 sep 4.1 mag 5.77,7.99 Sp K1II dist. 137.74 pc (449.31 l.y.)

BU  132 AB: 152; 250x: Fine light-yellow stars, closely split. -13% PRO, it is not binary.
18h 11m 14.78s -19° 50' 31.6" P.A. 187.00 sep 1.4 mag 7.01,7.13 Sp A4V dist. 101.52 pc (331.16 l.y.)

HJ 5030 AB: 152; 125x: Faint, very wide pair.  -71% PRO, it is not binary.
18h 11m 43.33s -23° 42' 04.2" P.A. 287.00 sep 43.5 mag 5.08,11.51 Sp K0III dist. 78.49 pc (256.03 l.y.)

STF2303 AB: 152; 250x: Extremely fine 3 Dm B resolves to hard point with seeing, A needs to be perfectly still.  No Gaia parallax data for the secondary.  An orbit should be tried.
18h 20m 05.15s -07° 58' 52.9" P.A. 253.00 sep 1.5 mag 6.62,9.25 Sp F2V dist. 60.13 pc (196.14 l.y.)

STF2313 AB: 152; 125x: Easy 1 Dm, wide.  -52% PRO, it is not binary.
18h 24m 42.99s -06° 36' 13.3" P.A. 196.00 sep 5.8 mag 7.48,8.73 Sp G0IV dist. 72.41 pc (236.2 l.y.)

AC 11 AB: 152; 450x: Hairline split with seeing, light blue stars, near equal. Overlapping disks from 250-380x. No Gaia parallax data.  SOC grade 4 orbit, 440.6-year period, at apastron now and for 60 more years.
18h 24m 57.21s -01° 34' 45.6" P.A. 355.00 sep 0.9 mag 6.71,7.21 Sp F0 dist. 133.51 pc (435.51 l.y.)


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