It was an incredibly good night. Seeing at high elevations was perfect through high magnifications. Lower elevations had less than perfect seeing, but very workable. I used the 6-inch only because I didn't open the shed to the 20-inch in time for it to cool down by nightfall. I worked the CDSA pairs list. Despite light marine haze, the 6-inch showed many faint stars. I observed from 9:30pm to midnight. I closed the night with a view of Saturn, whose rings are nearly edge on. The diameter of the rings appears very short in this orientation -- perhaps the outer reaches are invisible because they're too thin, and only the inner rings are still bright/thick enough to be seen? There were roof currents interfering with the view, so it wasn't a great view (it looked nice in my 60mm though).
I was so pleased with the 6-inch's performance (in combination with the 60mm) I am loath to replace it with a larger aperture. The optics will need to be very good indeed for me to take that step.
DA 9 AB: 152; 250x: Very extremely faint B within A's diffraction ring. 3 Dm. -5% PRO, it is not binary.
19h 04m 15.72s +43° 52' 49.5" P.A. 171.00 sep 2.0 mag 7.05,10.22 Sp A0V dist. 233.64 pc (762.13 l.y.)
STF2469 AB: 152; 250x: Excellent pair, light blue stars, 2 Dm, steady split, very close. 30% PRO, 181 AU WS, 1.9+1.4 Msol, it is likely binary and needs an orbit.
19h 07m 47.60s +38° 55' 41.6" P.A. 126.00 sep 1.3 mag 7.93,9.13 Sp A3 dist. 139.08 pc (453.68 l.y.)
STT 525 AB: 152; 250x: Beautiful light orange A, extremely faint B hardens with seeing to a point just outside A's diffraction ring. -34% PRO, it is not binary.
18h 54m 52.52s +33° 58' 06.9" P.A. 130.00 sep 1.8 mag 6.14,9.12 Sp A8+G5III dist. 358.42 pc (1169.17 l.y.)
STF2415 AB: 152; 200x: Unequal pale white stars, nearly 1 Dm, close separation but split with 125x, better seen 200x. -19% PRO, it is not binary.
18h 54m 32.84s +20° 36' 55.1" P.A. 290.00 sep 2.0 mag 7.07,8.73 Sp A0IV dist. 194.93 pc (635.86 l.y.)
STF2411 AB: 152; 125x: Rich field. Well separated pair, light orange A and 3 Dm white B. 9% PRO, 1,913 AU WS, 2.7+1.2 Msol, but RVD 3.7 > EV 1.9, it is not binary.
18h 52m 18.63s +14° 32' 08.0" P.A. 95.00 sep 13.3 mag 6.63,9.61 Sp G9III dist. 111.11 pc (362.44 l.y.)
BU 265 AB: 152; 250x: ! Delicate split, nearly 3 Dm, very close separation but clean split. 14% PRO, 576 AU WS, 3.8+2.4 Msol, it is possibly binary and needs an orbit.
18h 50m 14.94s +11° 31' 21.5" P.A. 227.00 sep 1.5 mag 7.37,9.24 Sp A1V+G:III dist. 520.83 pc (1698.95 l.y.)
STF2401 AB: 152; 125x: White stars, wide 3 Dm. -8% PRO, it is not binary.
18h 48m 57.83s +21° 10' 01.3" P.A. 38.00 sep 4.1 mag 7.27,9.27 Sp B3V dist. 2941.18 pc (9594.13 l.y.)
STF2391 AB: 152; 125x: Light yellow A, 3 Dm wide B. Seen with 60mm too. 23% PRO, 5,836 AU WS, 2.7+1.3 Msol, there is some chance it's binary and an orbit can be tried.
18h 48m 39.49s -06° 00' 15.5" P.A. 332.00 sep 37.7 mag 6.52,9.59 Sp A2II dist. 230.95 pc (753.36 l.y.)
STF2373 AB: 152; 125x: Light yellow stars, 1 Dm, fairly closely split with low power. Just resolved to split with 60mm scope at low power. 74% PRO, 1,416 AU WS, 3.5+2.7 Msol, it is possibly binary and an orbit should be tried.
18h 45m 51.33s -10° 29' 34.1" P.A. 336.00 sep 4.3 mag 7.39,8.43 Sp F2 dist. 268.82 pc (876.89 l.y.)
STF2375 AB: 152; 125x: Bright near equal white stars, closely split at 125x. Also split with 60mm at 90x. Very pretty. No Gaia parallax data for the primary. SOC grade 4 orbit 5000-year period.
18h 45m 28.36s +05° 30' 00.4" P.A. 120.00 sep 2.6 mag 6.34,6.73 Sp A1V dist. 188.68 pc (615.47 l.y.)
STF2360 AB: 152; 200x: 1 Dm, close split with 125x, best seen 200x. -15% PRO, it is not binary.
18h 39m 19.16s +20° 55' 58.9" P.A. 358.00 sep 2.5 mag 7.97,9.16 Sp B5IV dist. 2500 pc (8155 l.y.)
STT 360 AB: 152; 200x: ! Close 2 Dm, resolved at 125x, better seen at 200x, in a rich field. No Gaia parallax data for the secondary. An orbit should be tried in any case.
18h 38m 39.84s +04° 51' 17.3" P.A. 282.00 sep 1.7 mag 6.86,9.14 Sp K2III dist. 142.25 pc (464.02 l.y.)
STT 358 AB: 152; 200x: Near equal pale white stars, closely split with 125x, better seen with 200x. 51% PRO, 58 AU WS, 1.2+1.2 Msol, it is binary. SOC grade 4 orbit 512-year period.
18h 35m 53.22s +16° 58' 32.5" P.A. 146.00 sep 1.7 mag 6.94,7.08 Sp F8V dist. 32.88 pc (107.25 l.y.)
STF2325 AB: 152; 125x: Light yellow stars, wide 2 Dm. 60% PRO, 2,796 AU WS, 3.9+1.7 Msol, it is probably binary and needs an orbit.
18h 31m 25.69s -10° 47' 45.0" P.A. 257.00 sep 12.4 mag 5.77,9.31 Sp B2V dist. 330.03 pc (1076.56 l.y.)
WNO 6 AB: 152; 125x: Bright A, wide, 1 Dm B. Seen in 60mm low power too. Stelle Doppie says "parallax indicates physical" but they couldn't be more wrong: -92% PRO, it is not binary.
18h 28m 57.36s -26° 34' 55.5" P.A. 182.00 sep 41.8 mag 6.67,7.99 Sp A3III dist. 143.68 pc (468.68 l.y.)
H N 125 AB: 152; 125x: Close split, near equal. 8% PRO, 140 AU WS, 1.1+1.1 Msol, there is a chance it's binary, an orbit should be tried.
18h 28m 56.75s -25° 02' 34.5" P.A. 107.00 sep 2.5 mag 8.21,8.48 Sp G2V dist. 62.23 pc (202.99 l.y.)
STF2316 AB: 152; 125x: Bright light orange A and 2 Dm, close but well resolved B. Again, Stelle Doppie is wrong about parallax, actually -53% PRO, it is not binary.
18h 27m 12.51s +00° 11' 46.1" P.A. 322.00 sep 3.9 mag 5.38,7.62 Sp G0III+A6V dist. 143.88 pc (469.34 l.y.)
JC 6 AB: 152; 250x: ! Light orange A, grey B lies on A's diffraction ring, faint, 3 Dm. Very pretty diamond ring effect. No Gaia parallax data for the secondary. There hasn't been much change in PA or separation since discovery, but an orbit could be tried all the same. JC = W.S. Jacob, "Captain, Bombay Engineers" who observed with a Dolland telescope of 5-feet focal length -- probably a 4-inch refractor -- from "Poonah" = Pune, India. Wikipedia: "While in England in 1855 Jacob wrote "A few more words on the Plurality of Worlds" in which he suggested life on other planets ("probably that some of the known planets are inhabited, not very improbable that all of them are"), and described his computation of stellar orbits for the Royal Astronomical Society.[2] Jacob posited that apparent orbital anomalies in the binary star 70 Ophiuchi might be caused by an exoplanet.[5] While these anomalies are now thought to have other causes, this was the first serious claim by an astronomer to have detected an exoplanet using scientific methods: 100 years before the first exoplanet was conclusively detected and well before the science of exoplanets was even in its infancy. Professor David Kipping states that the ‘claim is so remarkable because Jacob was making tiny measurements (80 milliarc seconds or 22 millionths of a degree) with the naked eye, at a time when he wasn’t even sure whether Newton’s law of gravity held sway in distant parts of the galaxy. While Jacob... was ultimately proved wrong, he had the audacity to try.'"
18h 25m 21.02s -20° 32' 29.9" P.A. 280.00 sep 1.7 mag 5.03,7.43 Sp K1III+A1V dist. 125.79 pc (410.33 l.y.)
H 5 93 AB: 152; 125x: Near equal, white, wide. Seen low power in the 60mm. SD wrong again, -19% PRO, it is not binary.
18h 12m 59.40s +28° 15' 27.4" P.A. 136.00 sep 54.8 mag 8.16,8.28 Sp F8 dist. 82.44 pc (268.92 l.y.)
STF2315 AB: 152; 250x: ! White A, very extremely faint B resolves with foveal coaxing and I can then hold it direct, very closely split clean. No Gaia parallax data for either star. SOC grade 4 orbit, 2094-year period.
18h 24m 58.46s +27° 23' 41.3" P.A. 117.00 sep 0.6 mag 6.57,7.77 Sp A0V+A4V dist. 117.51 pc (383.32 l.y.)
LDS1012 AB: 60; 24x: Very super wide, 2 Dm. SD calls physical because of proper motion. It is not binary, -64% PRO.
18h 26m 10.09s +08° 46' 39.2" P.A. 163.00 sep 608.5 mag 7.91,8.37 Sp G7V dist. 28.89 pc (94.24 l.y.)
STT 350 AB: 152; 250x: !! Incredible pair, super delicate, pure white faint stars, 1 Dm, in a star field of bright white stars (open cluster NGC 6633, which is gorgeous, large loose stars in an E-W arc). Disappointingly, -32% PRO, it is not binary.
18h 26m 52.89s +06° 25' 23.9" P.A. 166.00 sep 1.9 mag 7.79,9.39 Sp A0III
STF2319 AB: 152; 200x: Well separated, equal white stars, closely with 125x. -23% PRO, it is not binary.
18h 27m 43.94s +19° 17' 43.9" P.A. 190.00 sep 5.3 mag 8.41,8.23 Sp F5 dist. 161.29 pc (526.13 l.y.)
STF2320 AB: 152; 250x: ! Super fine white A and 2 Dm B, hairline split. 58% PRO, 334 AU WS, 3.2+2.1 Msol, it is likely binary and needs an orbit.
18h 27m 45.89s +24° 41' 50.8" P.A. 1.00 sep 0.9 mag 7.14,8.90 Sp B9V dist. 256.41 pc (836.41 l.y.)
STF2417 AB: 152; 125x: Wide yellow-white near equal stars, seen in 60mm low power too. 15% PRO, 918 AU WS, 2.2+2.0, it is likely binary and an orbit should be tried.
18h 56m 13.18s +04° 12' 12.9" P.A. 106.00 sep 22.4 mag 4.59,4.93 Sp A5V+A5Vn dist. 47.42 pc (154.68 l.y.)
HO 91 AB: 152; 125x: Light yellow A and very faint B appears with averted vision but can't hold it direct, well split. 8% PRO, 3,508 AU WS, 6.7+1.7 Msol, it might be binary and needs an orbit.
18h 58m 14.75s +17° 21' 39.4" P.A. 146.00 sep 7.0 mag 5.44,10.12 Sp F8II dist. 473.93 pc (1545.96 l.y.)
STF2432 AB: 152; 125x: Wide, much fainter B can be seen with direct vision, brightens with averted. 20% PRO, 6,699 AU WS, 4.4+1.8 Msol, it is a little too far separated but worth to try an orbit.
19h 01m 48.60s +12° 32' 27.5" P.A. 87.00 sep 14.8 mag 6.82,10.44 Sp B8IV dist. 227.79 pc (743.05 l.y.)
HJ 5082 AB: 152; 125x: Light orange A, wide faint B. -9% PRO, it is not binary.
19h 03m 03.80s -19° 14' 44.4" P.A. 89.00 sep 7.7 mag 6.15,9.00 Sp G5II-III dist. 606.06 pc (1976.97 l.y.)
H N 129 AB: 152; 125x: White stars, 1 Dm, well split. No parallax data for the secondary. An orbit can be tried to see if it indicates binary.
19h 04m 14.20s -22° 53' 47.5" P.A. 309.00 sep 8.3 mag 6.90,9.16 Sp A0V dist. 303.95 pc (991.48 l.y.)
H N 126 AB: 152; 125x: 250x: Beautiful, slightly unequal pair, split from low to high powers, best seen with 250x, perfect disks. 4% PRO, 65 AU WS, 1.2+1.1 Msol, it is likely binary and needs an orbit.
19h 04m 20.28s -21° 31' 53.7" P.A. 183.00 sep 1.3 mag 7.87,8.06 Sp F8V dist. 56.37 pc (183.88 l.y.)
STF2445 AB: 152; 125x: Unequal wide pair. 2% PRO with 1.3% of error, very wide 7,560 AU WS, 4.5+3.1 Msol, it is not likely binary.
19h 04m 38.50s +23° 19' 45.5" P.A. 262.00 sep 12.4 mag 7.25,8.57 Sp B2Ve dist. 476.19 pc (1553.33 l.y.)
STF2446 AB: 152; 125x: 2 Dm, wide, unremarkable. 80% PRO, 595 AU WS, 1.6+1.0 Msol, and RVD 1.7 < EV 2.8, it is very likely binary and needs an orbit.
19h 05m 47.70s +06° 32' 49.2" P.A. 152.00 sep 9.5 mag 6.97,8.88 Sp F5 dist. 65.92 pc (215.03 l.y.)
STF2449 AB: 152; 125x: White, slightly unequal, wide, also seen 60mm low power. -40% PRO, it is not binary.
19h 06m 23.04s +07° 09' 20.1" P.A. 289.00 sep 8.2 mag 7.20,7.72 Sp F2V dist. 105.6 pc (344.47 l.y.)
STF2447 AB: 152; 125x: White, wide, large delta. 7% PRO, 5,760 AU WS, 4.1+2.1 Msol, there is a small chance it's binary and an orbit should be tried.
19h 06m 35.11s -01° 20' 46.0" P.A. 342.00 sep 14.1 mag 6.83,9.62 Sp B5V dist. 60.64 pc (197.81 l.y.)
S 710 AB: 152; 125x: White stars, 2 Dm, good split with 152mm, very delicately split 60mm low power. 61% PRO, 2,458 AU WS, 2.0+1.9 Msol, RVD 0.2 < EV 1.7, it is likely binary and needs an orbit.
05h 25m 13.07s -11° 18' 44.6" P.A. 196.00 sep 10.3 mag 8.61,8.91 Sp A2Vb dist. 225.73 pc (736.33 l.y.)
STF2457 AB: 152; 125x: White stars, 2 Dm, well separated. 50% PRO, 1,118 AU WS, 1.8+1.1 Msol, it is likely binary and needs an orbit.
19h 07m 08.02s +22° 35' 03.7" P.A. 201.00 sep 10.2 mag 7.46,9.52 Sp A7IV dist. 85.98 pc (280.47 l.y.)
STF2471 AB: 152; 125x: White A, well split B, faint but an attractive pair. 80% PRO, 812 AU WS, 1.7+0.8 Msol, it is possibly binary and needs an orbit.
19h 10m 56.93s +08° 07' 17.6" P.A. 122.00 sep 8.6 mag 7.48,10.64 Sp A9V dist. 94.43 pc (308.03 l.y.)
STF2484 AB: 152; 125x: Beautiful close split, 1 Dm. 0% PRO, 139 AU WS, 1.3+0.9, it might be binary. SOC grade 4 orbit, 1500-year period.
19h 14m 15.66s +19° 03' 50.3" P.A. 241.00 sep 2.1 mag 7.93,9.51 Sp F8 dist. 67.2 pc (219.21 l.y.)
STTA178 AB: 152; 125x: Light orange A, 2 Dm super-wide B. Seen in 60mm low power. 33% PRO, very wid 16,757 AU WS, 3.9+2.3 Msol, RVD 3.2 EV 0.8, it is not binary.
19h 15m 20.09s +15° 05' 01.2" P.A. 267.00 sep 89.6 mag 5.69,7.64 Sp G8II-III dist. 201.21 pc (656.35 l.y.)
STT 368 AB: 152; 250x: ! Close white A and blue B in perfect seeing, 1 Dm, just past hairline split. 4% PRO, 221 AU WS, 1.9+2.4 Msol, it might be binary and needs an orbit.
19h 16m 01.84s +16° 09' 39.5" P.A. 218.00 sep 1.1 mag 7.53,8.49 Sp A9IV dist. 240.96 pc (786.01 l.y.)
No comments:
Post a Comment