Saturday, August 24, 2024

20 august 2024

Observed with the 6-inch.  High haze and the seeing wasn't very good, but ok enough at high elevations to get some good results.  Ended the night with views of Saturn and the moon, both good at low power but they were still low to the horizon.

A   382 AB: 152; 250x: Very closely split, >2 Dm, very challenging pair.  Surprisingly, -37% PRO, it is not binary.
20h 08m 01.18s +42° 23' 06.0" P.A. 96.00 sep 1.7 mag 7.21,9.49 Sp K0 dist. 200.4 pc (653.7 l.y.)

AC   12 AB: 152; 250x: Split with 125x but best seen 250x, closely split, half delta magnitude, dull white stars, nice pair.  24% PRO, 161 AU WS, 1.8+1.5 Msol, it might be binary and needs an orbit tried.
19h 58m 22.77s -02° 13' 54.4" P.A. 298.00 sep 1.6 mag 7.54,8.32 Sp F5 dist. 100.6 pc (328.16 l.y.)

AC   17 AB: 152; 250x: Bright light-yellow A, extremely faint B is well separated and appears with best seeing as a very small point.  Excellent telescope contrast helps to detect B. 50% PRO, 462 AU WS, 2.7+0.9 Msol, it is possibly binary and needs an orbit tried.
20h 12m 31.73s +51° 27' 49.0" P.A. 82.00 sep 4.4 mag 6.17,10.55 Sp K2.5III dist. 106.16 pc (346.29 l.y.)

BU   56 AB: 152; 250x: Excellent pair, light orange stars, 2 Dm, very closely split. 2% PRO, 101 AU WS, 1.1+1.3 Msol, it is somewhat possible to be binary, an orbit should be tried.  Burnham thought it "probably fixed."
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  266 AB: 152; 200x: B appears with averted vision then can hold with foveal coaxing, white, wide, 3 Dm. 17% PRO, 2,874 AU WS, 2.3+1.0 Msol, but the RVD 3.3 > EV 1.4, it is not binary.
19h 57m 56.15s +11° 24' 53.0" P.A. 166.00 sep 15.8 mag 7.57,11.50 Sp A3 dist. 198.41 pc (647.21 l.y.)

BU 1475 AB: 152; 200x: Red AB is well separated, 1 Dm, and points in the general direction of the white C star, which itself has a very faint, 3 Dm close companion.  AB: 66% PRO, 6,920 AU WS, 5.1+3.1 Msol, and RVD 2.6 > EV 1.5, it is not binary.  CD -88% PRO, it is not binary.
AB: 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.)
CD: 19h 58m 00.46s -09° 04' 26.7" P.A. 163.00 sep 4.9 mag 8.70,11.10 Sp K0

H 1  93 AB: 152; 250x: Split 125x but better seen 250x.  1 Dm, very close split. 60% PRO, 614 AU WS, 3.0+2.6 Msol, it is possibly binary and needs an orbit tried.
20h 01m 39.17s -00° 11' 56.5" P.A. 297.00 sep 1.8 mag 7.67,8.39 Sp A0 dist. 165.84 pc (540.97 l.y.)

HJ 5168 AB: 152; 125x: Faint B, wide, 3 Dm.  92% PRO, 4,492 AU WS, 3.6+1.3 Msol, but RVD 4.8 > EV 1.4, it is not binary.
20h 07m 23.81s -29° 43' 14.9" P.A. 79.00 sep 18.8 mag 6.85,10.30 Sp K2IV dist. 230.95 pc (753.36 l.y.)

STF2533 AB: 152; 125x: 2 Dm, wide, also seen with 60mm 40x.  -97% PRO, they are not binary.
19h 30m 04.70s -00° 26' 41.8" P.A. 212.00 sep 22.1 mag 7.37,9.98 Sp A3V dist. 114.03 pc (371.97 l.y.)

BU 655 AB: 152; 250x: Component of STF2549  The Struve system is a slightly arced string of three stars with a fainter AC in the middle, near-equal AD at either end.  A is reddish color.  These three also seen with the 60mm 40x.  With 250x and averted vision, I can see the very faint BU 655 AB appear closely separated from A.  AB is -1% PRO, 702 AU WS, there is some chance it's binary and an orbit should be tried.  AC and AD do not share any parallax range and are not binary.
AB: 19h 31m 12.30s +63° 18' 52.5" P.A. 328.00 sep 2.1 mag 8.34,12.00 Sp K0 dist. 467.29 pc (1524.3 l.y.)

STF2596 AB: 152; 200x: Split at 125x, but better seen 200x, lovely cream white A and close 1 Dm light yellow B.  -24% PRO, they are not binary in spite of the SOC grade 4 orbit.
19h 54m 01.95s +15° 17' 31.7" P.A. 297.00 sep 2.1 mag 7.29,8.68 Sp F8V dist. 82.58 pc (269.38 l.y.)

STF2613 AB: 152; 125x: Slightly unequal close white stars, nice pair, also seen in 60mm at 40x.  69% PRO, 293 AU WS, 1.5+1.4 Msol, it is likely binary.  SOC grade 4 orbit, 2106-year period. 
20h 01m 26.66s +10° 44' 54.8" P.A. 354.00 sep 3.5 mag 7.48,8.02 Sp F5V+F5V dist. 80.58 pc (262.85 l.y.)
STF2621 AB: 152; 125x: Slightly unequal, well split.  63% PRO, 2,559 AU WS, 2.9+2.8 Msol, and RVD 0.2 < EV 2.0, it is likely binary and needs an orbit.
20h 04m 34.52s +09° 14' 24.2" P.A. 224.00 sep 5.7 mag 8.36,8.62 Sp B8V+A1V dist. 228.83 pc (746.44 l.y.)

STF2625 AB: 152; 125x: Faint near equal pair.  -93% PRO, it is not binary.
20h 06m 45.79s -12° 55' 37.2" P.A. 4.00 sep 12.1 mag 7.78,10.24 Sp K0III dist. 452.49 pc (1476.02 l.y.)

STF2628 AB: 152; 200x: White A and 2 Dm light orange B, closely split.  66% PRO, 120 AU WS, 1.4+0.8 Msol, it is possibly binary and needs an orbit.
20h 07m 50.37s +09° 23' 59.4" P.A. 338.00 sep 3.0 mag 6.60,8.66 Sp F3V dist. 39.37 pc (128.42 l.y.)

STF2634 AB: 152; 125x: 2 Dm, well split.  1% PRO, 107 AU WS, 0.9+0.6 Msol, and RVD 1.4 < EV 4.9, it is possibly binary and needs an orbit.
20h 09m 34.30s +16° 48' 19.2" P.A. 13.00 sep 4.1 mag 7.77,9.92 Sp K0 dist. 23.66 pc (77.18 l.y.)

STF2635 AB: 152; 125x: White stars, >3Dm, well split.  -16% PRO, and RVD 3.4 > EV 3.0, it is not binary.
20h 10m 07.83s +08° 26' 37.8" P.A. 80.00 sep 7.7 mag 6.66,10.19 Sp F7V dist. 62.74 pc (204.66 l.y.)

STF2637 AB: 152; 125x: >1Dm, well split white stars in a rich field. 5% PRO, 519 AU WS, 1.5+0.9 Msol, it is possibly binary and needs an orbit.
20h 09m 56.61s +20° 54' 53.2" P.A. 331.00 sep 11.6 mag 6.56,8.85 Sp F3V dist. 45.25 pc (147.61 l.y.)

STF2675 AB: 152; 125x: Bright A is around 5th magnitude, well separated 3 Dm B.  -3% PRO, 730 AU WS, 3.5+1.5 Msol, it probably is not binary.
20h 08m 53.32s +77° 42' 40.9" P.A. 120.00 sep 7.3 mag 4.39,8.34 Sp B9III dist. 96.53 pc (314.88 l.y.)

STFA 43 AB: 60; 40x:  Albeiro, lovely gold and blue, 2 Dm, wide, very clean at this aperture.  only 6% PRO but with 5% error, 4,028 AU WS, it is not likely binary.
19h 30m 43.29s +27° 57' 34.9" P.A. 54.00 sep 34.6 mag 3.19,4.68 Sp K3II+B9.5 dist. 133.16 pc (434.37 l.y.)

STT 395 AB: 152; 380x: Overlapping disks, notched high and six. Notched elongation at lower powers.  Slightly unequal, blue-white.  No Gaia parallax data.  SOC grade 4 orbit, 1201-year period.
20h 02m 01.45s +24° 56' 16.8" P.A. 129.00 sep 0.7 mag 5.83,6.19 Sp F2III dist. 67.98 pc (221.75 l.y.)
STTA198 AB: 152; 125x: Super wide near equal white stars.  They are over a stream of faint Milky Way stars, which I can still sense in spite of the light pollution and just past full rising moon. -54% PRO, it is not binary.
20h 06m 38.76s +07° 34' 34.2" P.A. 185.00 sep 64.6 mag 7.12,7.55 Sp A2V+A3V dist. 110.99 pc (362.05 l.y.)

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