Clear nights this week since the summer weather pattern is here, keeping the marine layer at bay. I opened up the 20-inch but seeing was never good enough to support very close separations. So I continued on with the Struve list, covering a few gaps in the spring list.
The night of the 10th I also used the 20-inch, but with the night vision device. I ran through several globular clusters, hitting all of them. Using NV in the back yard is like using the 20-inch in a dark sky -- I could do an observing program for globular clusters, easily. Image scale remains a problem, as I'm at something like 55x. But I could use the Challenger, say, to go after the very small and dim ones.
Solor observing almost daily, of course, with lots to see on the more active sun.
13h 37m 27.70s +36° 17' 41.4" P.A. 94.00 sep 1.7 mag 4.98,6.95 Sp A7III+A8V dist. 60.9 pc (198.66 l.y.)
STF1758 AB: 203; 140x: Light orange stars, slightly unequal, easy split. -95% PRO, it is not binary.
13h 32m 51.51s +49° 08' 24.3" P.A. 290.00 sep 3.4 mag 8.70,8.95 Sp G0 dist. 77.04 pc (251.3 l.y.)
STF1607 AB: 203; 140x: Wide, 1 Dm. -97% PRO, it is not binary.
12h 11m 33.63s +36° 05' 21.7" P.A. 29.00 sep 27.0 mag 8.89,9.83 Sp A3 dist. 188.68 pc (615.47 l.y.)
STF1609 AB: 203; 140x: Light orange B, seen with averted vision, wide. No parallax data for the secondary.
12h 11m 41.76s +50° 50' 15.8" P.A. 205.00 sep 11.1 mag 7.98,9.55 Sp F2 dist. 184.84 pc (602.95 l.y.)
STF1610 AB: 203; 140x: Faint, wide, 2 Dm. 95% PRO, 3,543 AU WS, 1.5+0.9 Msol, but the RVD 2.1 > EV 1.1, it is not binary.
12h 11m 53.03s +38° 46' 03.8" P.A. 331.00 sep 29.5 mag 8.56,10.62 Sp G4V dist. 139.28 pc (454.33 l.y.)
STF1613 AB: 203; 200x: Faint, near equal, good close split. 10% PRO, 252 AU WS, 1.7+1.7 Msol, it is likely binary and needs an orbit.
12h 12m 34.01s +35° 45' 45.6" P.A. 7.00 sep 1.2 mag 9.29,9.36 Sp F5 dist. 200 pc (652.4 l.y.)
STF1622 AB: 203; 140x: Light orange stars, wide, 3 Dm. -3% PRO, and the RVD 4.5 > EV 2.1, it is not binary.
12h 16m 07.55s +40° 39' 36.6" P.A. 260.00 sep 11.6 mag 5.86,8.71 Sp M1III+F7V dist. 236.41 pc (771.17 l.y.)
STF1815 AB: 203; 140x: Wide, 1 Dm white stars. -89% PRO, it is not binary.
14h 12m 36.22s +45° 11' 52.5" P.A. 151.00 sep 9.0 mag 9.58,10.92 Sp K0 dist. 170.07 pc (554.77 l.y.)
STF1895 AB: 203; 140x: Unequal, wide, in a group of stars to form a triangle. -15% PRO, 3,667 AU WS, 2.5+2.1 Msol, and the RVD 0.8 < EV 1.5. There is some chance it is binary but not likely, can try an orbit.
14h 57m 27.87s +40° 09' 42.2" P.A. 42.00 sep 12.7 mag 8.27,8.88 Sp A9IV dist. 125.63 pc (409.81 l.y.)
STF1896 AB: 203; 140: Very nice pair, slightly unequal white stars, close separation with low power, and a plus 1 star (AC) very wide with a PA perpendicular to AB. -32% PRO, it is not binary.
14h 58m 21.57s +44° 02' 35.9" P.A. 276.00 sep 4.1 mag 8.97,9.47 Sp F8 dist. 96.06 pc (313.35 l.y.)
STF1932 AB: 203; 200x: Excellent pair, slightly unequal white stars, with 140x better seen 200x. 90% PRO, only 60 AU WS, 1.1+1.1 Msol, it is certainly binary. SOC grade 2 orbit, 196-year period, it will move W to NW and slightly tighten in the next could of decades.
15h 18m 20.19s +26° 50' 24.7" P.A. 267.70 sep 1.6 mag 7.32,7.41 Sp F6V+F6V dist. 35.98 pc (117.37 l.y.)
STF1936 AB: 203l 140x: Slightly unequal stars, very wide. -95% PRO, it is not binary.
15h 21m 07.63s +27° 02' 23.4" P.A. 231.00 sep 19.8 mag 9.92,10.09 Sp F2+K0
STF1941 AB: 203; 200x: Faint stars, suspected as double low power, very close split 200x, slightly unequal. 16% PRO, 222 AU WS, 1.4+1.3 Msol, it is possible to be binary, an orbit should be tried.
15h 25m 42.81s +26° 37' 40.5" P.A. 212.00 sep 1.4 mag 9.65,9.77 Sp F5 dist. 168.63 pc (550.07 l.y.)
STF1955 AB: 203; 140x: Faint, slightly unequal stars, well split. 61% PRO, 2,060 AU WS, 1.7+1.5 Msol, and the RVD 0.7 < EV 1.7, it is probably binary and needs an orbit.
15h 33m 51.28s +26° 42' 30.4" P.A. 237.00 sep 7.8 mag 9.84,10.32 Sp F8
STF1951 AB: 203; 140x: Bright white A, B flashes with averted vision and then can hold direct, wide. -88% PRO, it is not binary.
15h 30m 20.35s +27° 39' 29.8" P.A. 294.00 sep 17.3 mag 7.89,11.88 Sp A0 dist. 531.91 pc (1735.09 l.y.)
STF1963 AB: 203; 140x: Near equal white stars, easy split. -7% PRO, 435 AU WS, 1.3+1.2 Msol, and the RVD 0.3 < EV 3.2, it is not likely binary.
15h 37m 53.73s +30° 06' 10.4" P.A. 298.00 sep 5.2 mag 8.54,8.85 Sp F8 dist. 75.87 pc (247.49 l.y.)
STF1935 AB: 203; 140x: Near equal stars, well split. 30% PRO, 1,619 AU WS, 1.4+1.3 Msol, and the RVD 0.3 < EV 1.7, it is likely binary any needs an orbit.
15h 20m 13.27s +30° 41' 44.2" P.A. 289.00 sep 8.6 mag 9.91,10.19 Sp G5 dist. 86.66 pc (282.68 l.y.)
STF1988 AB: 203; 140: Near equal white stars, well split. 14% PRO, 159 AU WS, 1.6+1.5 Msol, it is possibly binary and needs an orbit.
15h 56m 45.53s +12° 28' 40.6" P.A. 249.00 sep 1.7 mag 7.59,7.84 Sp F1V dist. 96.25 pc (313.97 l.y.)
STF1919 AB: 203; 140x: Near equal white stars, very wide. 68% PRO, 760 AU WS, 1.2+1.0 Msol, and the RVD 0.8 < EV 2.3, it is certainly binary and needs an orbit.
15h 12m 43.48s +19° 17' 09.8" P.A. 11.00 sep 23.2 mag 6.71,7.38 Sp G1V+G5V dist. 27.24 pc (88.86 l.y.)
STF1917 AB: 203; 140x: Very close split, unequal stars. -33% PRO, it is not binary.
15h 12m 33.29s +15° 22' 33.6" P.A. 232.00 sep 2.5 mag 9.84,9.91 Sp F8 dist. 107.76 pc (351.51 l.y.)
STF1923 AB: 203; 140x: 1 Dm, well split. 22% PRO, 645 AU WS, 1.5+1.1 Msol, it is possibly binary and needs an orbit.
15h 13m 47.15s +14° 26' 54.3" P.A. 12.00 sep 4.8 mag 9.07,10.14 Sp G0V dist. 150.6 pc (491.26 l.y.)
STF1924 AB: 203; 140x: Faint, 1 Dm, very wide. -62% PRO, it is not binary.
15h 14m 06.54s +25° 45' 26.1" P.A. 306.00 sep 15.2 mag 9.71,10.88 Sp A7
STF1931 AB: 203; 140x: Bright light yellow stars, wide, half delta magnitude. -32% PRO, it is not binary.
15h 18m 41.98s +10° 25' 39.7" P.A. 166.00 sep 13.4 mag 7.20,8.07 Sp F7V+G3V dist. 49.98 pc (163.03 l.y.)
STF1930 AB: 203; 140x: Wide, faint B, 4 Dm. 74% PRO, 289 AU WS, 1.6+0.5 Msol, but the RVD 3.9 > EV 3.6, it might not be binary, but an orbit should be tried.
15h 19m 18.79s +01° 45' 55.5" P.A. 36.00 sep 11.1 mag 5.06,10.11 Sp F8V dist. 25.38 pc (82.79 l.y.)
STF1943 AB: 203; 140x: Slightly unequal, well separated. 92% PRO, 450 AU WS, 1.1+1.0 Msol, it is likely binary and needs an orbit.
15h 27m 37.68s +05° 22' 06.2" P.A. 148.00 sep 5.1 mag 9.29,9.58 Sp G5
STF1945 BC: 203; 140x: BC are faint, equal, well separated, with a wide only slightly brighter A star in the same PA. 60% PRO, 901 AU WS, 0.9+0.9 Msol, and the RVD 0.0 < EV 1.9, it is most likely binary and needs an orbit.
15h 27m 59.19s +14° 42' 22.6" P.A. 281.00 sep 9.2 mag 10.62,10.62
STF1949 AB: 203; 140x: Equal, wide. 95% PRO, 3,369 AU WS, 1.4+1.3 Msol, and the RVD 0.2 < EV 1.2, it is likely binary and needs an orbit.
15h 30m 38.37s +13° 03' 23.1" P.A. 213.00 sep 16.5 mag 10.16,10.25 Sp G0+G0
STF1954 AB: 203; 140x: Lovely 1 Dm yellow-white stars, close but easily split with low power. -75% PRO, it is not binary, though there is a SOC grade 4 orbit, it is likely in error.
15h 34m 48.14s +10° 32' 20.0" P.A. 171.50 sep 4.0 mag 4.17,5.16 Sp F0IV dist. 69.93 pc (228.11 l.y.)
STF1953 AB: 203; 140x: Unequal, wide. 14% PRO, 2,044 AU WS, 1.9+1.5 Msol, and the RVD 0.9 < EV 1.7, it is likely binary and needs an orbit.
15h 32m 57.15s +05° 30' 32.3" P.A. 253.00 sep 6.7 mag 9.65,10.58 Sp F5 dist. 641.03 pc (2091.04 l.y.)
STF1960 AB: 203l 140x: Unequal, wide. 68% PRO, 2,121 AU WS, 1.4+1.2 Msol, and the RVD 0.9 < EV 1.5, it is likely binary and needs an orbit.
15h 36m 35.97s +09° 14' 45.4" P.A. 320.00 sep 12.1 mag 9.96,10.52 Sp G5
STF1968 AB: 203; 140x: Slightly unequal, wide. 28% PRO, 1,314 AU WS, 1.1+0.9 Msol, and the RVD 0.7 < EV 1.6, it is likely binary and needs an orbit.
15h 45m 23.29s -01° 23' 29.3" P.A. 93.00 sep 14.4 mag 9.49,10.49 Sp G5V+K0
STF1974 AB: 203; 200x: Near equal, close split, best seen higher power. 24% PRO, 343 AU WS, 1.5+1.4 Msol, it is likely binary and needs an orbit.
15h 49m 11.99s -03° 14' 01.1" P.A. 159.00 sep 2.5 mag 8.95,9.12 Sp A0
STF1985 AB: 203; 140x: Light orange stars, 1 Dm, wide. 27% PRO, 231 AU WS, 1.2+0.9 Msol, it is probably binary, and there is a grade 5 SOC orbit, 2307-year period.
15h 55m 54.63s -02° 09' 51.3" P.A. 355.00 sep 6.0 mag 7.03,8.65 Sp F8V dist. 36.9 pc (120.37 l.y.)
15h 57m 14.92s +03° 24' 19.2" P.A. 320.00 sep 10.4 mag 7.31,8.71 Sp A0V+B6V dist. 179.21 pc (584.58 l.y.)
STF1993 AB: 203; 140x: 2 Dm, very wide. -97% PRO, it is not binary. =STF1994
15h 59m 46.92s +17° 22' 34.7" P.A. 43.00 sep 20.1 mag 8.59,8.88 Sp A0
STF1990 BC: 203; 140x: Wide near equal AB, and B has a near equal pair close companion. All easy splits with low power. -14% PRO, it is not binary.
15h 58m 56.87s +21° 47' 54.8" P.A. 26.00 sep 4.0 mag 9.25,9.29 Sp A2 dist. 162.34 pc (529.55 l.y.)
STF1986 AB: 203; 140x: Unequal very wide. -19% PRO, it is not binary.
15h 55m 29.92s +10° 06' 17.4" P.A. 93.00 sep 14.7 mag 8.86,9.85 Sp F0 dist. 645.16 pc (2104.51 l.y.)
STF1978 AB: 203; 140x: Near equal, wide. 75% PRO, 2,217 AU WS, 1.4+1.2 Msol, it is likely binary and needs an orbit.
15h 50m 55.23s +14° 40' 42.9" P.A. 233.00 sep 14.8 mag 9.19,10.13 Sp G0 dist. 3333.33 pc (10873.32 l.y.)
STF1970 AB: 203; 140x: Very bright A and faint wide B. 15% PRO, 1,424 AU WS, 2.8+0.7 Msol, it is possibly binary and needs an orbit.
15h 46m 11.21s +15° 25' 18.9" P.A. 263.00 sep 29.9 mag 3.66,9.96 Sp A2IV dist. 47.55 pc (155.11 l.y.)
STF1942 AB: 203; 140x: Near equal wide. 81% PRO, 2,177 AU WS, 1.7+1.2 Msol, and the RVD 1.1 < EV 1.6, it is likely binary and needs an orbit.
15h 26m 03.11s +21° 27' 35.7" P.A. 91.00 sep 9.7 mag 9.49,10.68 Sp G5 dist. 584.8 pc (1907.62 l.y.)
STF1979 AB: 203; 140x: Equal, wide. 26% PRO, 2,677 AU WS, 1.9+1.6 Msol, and the RVD 0.7 < EV 1.5, it is likely binary and needs an orbit.
15h 50m 39.10s +22° 28' 35.2" P.A. 246.00 sep 9.3 mag 9.58,10.14 Sp F5 dist. 135.32 pc (441.41 l.y.)
STF1977 AB: 203; 140x: Faint, equal, wide. 2% PRO, 1,672 AU WS, 1.5+1.0 Msol, but the RVD 1.9 > EV 1.6, it likely is not binary.
15h 49m 32.92s +25° 27' 36.7" P.A. 356.00 sep 13.9 mag 8.76,10.95 Sp G0IV dist. 200.4 pc (653.7 l.y.)
STF1981 AB: 203; 140x: Faint, wide, unequal. 20% PRO, 2,296 AU WS, 1.6+1.1 Msol, but the RVD 1.6 is slightly higher than the EV 1.4, it is possibly binary and needs an orbit.
15h 51m 16.00s +25° 08' 39.2" P.A. 4.00 sep 12.1 mag 9.37,10.86 Sp G0
STF1950 AB: 203; 200x: Unequal, close, needed higher power to resolve. 71% PRO, 1,758 AU WS, 4.1+2.9 Msol, RVD 1.7 < EV 2.7, it is likely binary and needs an orbit.
15h 29m 58.46s +25° 30' 31.1" P.A. 91.00 sep 3.3 mag 8.07,9.23 Sp K4III dist. 485.44 pc (1583.51 l.y.)
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