Saturday, August 10, 2024

6 august 2024

A good night with the 6-inch.  Seeing forecast to be average but with the 6-inch I got excellent images keeping the scope toward zenith.  Very pleased with the results, had some very high magnifications used.

BU 60 AB: 152; 250x: 3 Dm yellow-white stars, nicely split.  60% PRO, 712 AU WS, 4.2+2.0 Msol, it is likely binary and needs an orbit.
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 63 AB: 152; 570x: B appears as a brightening in A's diffraction at 250x, with 380x it is more separate, 570x pushes them far enough apart to clearly split, 2 Dm.  Surprisingly, -57% PRO, it is not binary.
20h 30m 17.95s +10° 53' 45.3" P.A. 347.00 sep 0.9 mag 6.20,8.02 Sp Be+B dist. 227.79 pc (743.05 l.y.)

BU 65 AB: 152; 250x: B appears immediately a little outside A's diffraction ring, white and pale white, 3 Dm.  -45% PRO, it is not binary.
20h 47m 48.33s +06° 00' 29.5" P.A. 200.00 sep 1.5 mag 5.64,8.24 Sp A0V dist. 131.41 pc (428.66 l.y.)

BU 67 AB: 152; 250x: B hardens to a point on A's diffraction ring in best seeing and careful looking.  3Dm.  -8% PRO, 181 AU WS, 2.2+1.1 Msol, it is borderline to be binary, an orbit should be tried.
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 152 AB: 152; 250x: 1 Dm or more, yellow-orange stars very closely split.  -25% PRO, 168 AU WS, 2.2+1.6 Msol, it is not likely binary, despite the SOC grade 4 orbit.
20h 42m 16.81s +57° 23' 07.4" P.A. 82.00 sep 1.2 mag 7.21,8.80 Sp A4IV dist. 152.44 pc (497.26 l.y.)

BU 155 AB: 152; 380x: Hairline split with best seeing, unequal, blue-white stars. No Gaia parallax data for the secondary.  There is a SOC grade 5 orbit, 739-year period, time will tell if it's correct.
20h 51m 05.41s +51° 25' 01.7" P.A. 40.00 sep 0.7 mag 7.36,8.13 Sp A9IV dist. 124.53 pc (406.22 l.y.)

HO 128 AB: 152; 250x: Very delicate, light orange bright A.  Close split B is very faint, 2 Dm, and is on the inside of A's diffraction ring.  59% PRO, it is not binary.
20h 22m 55.49s +42° 59' 00.4" P.A. 357.00 sep 1.4 mag 6.41,8.82 Sp G8III dist. 102.99 pc (335.95 l.y.)

SHJ 323 AB: 152; 200x: Light yellow orange stars, close split, 2 Dm.  3% PRO, 40 AU WS, 1.7+1.1 Msol, it is possibly binary.  SOC grade 4 orbit, 376-year period.
20h 28m 51.62s -17° 48' 49.2" P.A. 189.00 sep 1.7 mag 4.97,6.88 Sp F3V dist. 30.27 pc (98.74 l.y.)

SHJ 324 AB: 60; 40x: Bright pair, half delta magnitude, wide.  54% PRO, 1,563 AU WS, 2.1+1.7 Msol, it is possible they are binary and an orbit should be tried.
20h 29m 53.91s -18° 34' 59.4" P.A. 238.00 sep 22.0 mag 5.91,6.68 Sp A3Vn+A7V dist. 32.03 pc (104.48 l.y.)

STF2666 AB: 152; 200x: Nice close split, light-yellow stars, split from 125x-250x.  Also very closely split with the 60mm at 90x, can hold B after foveal coaxing and having seen it in the 6-inch.  32% PRO, 2,749 AU WS, 7.6+4.8 Msol, it is likely binary and needs an orbit.
20h 18m 06.99s +40° 43' 55.6" P.A. 245.00 sep 2.8 mag 5.96,8.24 Sp O9IV+B1.5 dist. 595.24 pc (1941.67 l.y.)

STT 408 AB: 152; 250x: ! Beautiful, excellent pair. White A and blue B, 2 Dm, close separation, like a diamond ring.  -37% PRO, it is not binary.  
20h 34m 01.96s +34° 40' 44.4" P.A. 193.00 sep 1.6 mag 6.75,9.37 Sp B7V dist. 332.23 pc (1083.73 l.y.)

STT 410 AB: 152; 250x: Excellent equal white stars, hairline split but steady.  -28% PRO, they probably are not binary.
20h 39m 33.31s +40° 34' 46.8" P.A. 3.00 sep 0.9 mag 6.73,6.83 Sp B8IIIpMn dist. 283.29 pc (924.09 l.y.)

STT 413 AB: 152; 760x: At this high magnification the disks are swelled and look like blue Galilean moons! Clean split at this power, hairline at lower powers.  Because of their brightness I needed the highest powers to push the disks apart.  19% PRO, 238 AU WS, 5.0+3.7 Msol, it is probably binary.  SOC grade 4 orbit 800-year period. 
20h 47m 24.53s +36° 29' 26.7" P.A. 1.00 sep 0.9 mag 4.73,6.26 Sp B5Ve dist. 235.85 pc (769.34 l.y.)
STT 414 AB: 152; 125x: 1 Dm, wide.  27% PRO, 4,686 AU WS, 3.8+2.7 Msol, it is likely binary and needs an orbit.
20h 47m 09.92s +42° 24' 35.4" P.A. 95.00 sep 9.9 mag 7.43,8.93 Sp B7V dist. 353.36 pc (1152.66 l.y.)

STT 418 AB: 152; 250x: Equal orange stars, very close split with 250x, suspected double at 125x.  Very faint, very slow satellite moved through field during the observation. -52% PRO, it is not binary in spite of the SOC grade 4 orbit.
20h 54m 49.84s +32° 42' 23.2" P.A. 283.00 sep 0.9 mag 8.23,8.27 Sp G0 dist. 60.72 pc (198.07 l.y.)

STT 419 AB: 152; 200x: White A and 2 Dm, very closely split B. 16% PRO, 333 AU WS, 2.5+1.4 Msol, there is some chance it's binary and an orbit should be tried.
20h 54m 42.00s +37° 04' 25.3" P.A. 24.00 sep 1.7 mag 7.20,9.97 Sp A0 dist. 193.8 pc (632.18 l.y.)

STT 423 AB: 152; 200x: 2 Dm white stars, close split.  46% PRO, 1,239 AU WS, 4.0+2.3 Msol, it is likely binary and needs an orbit.
20h 55m 17.96s +42° 30' 48.6" P.A. 76.00 sep 2.7 mag 7.12,9.64 Sp B9 dist. 418.41 pc (1364.85 l.y.)

STU 13 AB: 152; 125x: >1 Dm, white, wide.  -25% PRO, it is not binary.
20h 34m 56.52s +41° 43' 04.1" P.A. 196.00 sep 27.2 mag 7.57,10.13 Sp B9

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