We've had a long stretch of cloudy weather, so I haven't been able to observe much. There were a few clear nights but with poor seeing and transparency, so I didn't bother. I regret that, because I could have still observed with the 6-inch and tackled some of the more routine Struve pairs. Tuesday night was one such, and I decided to observe, heavy dew and all, since it seemed to be the last clear night for a couple weeks. I'm glad I went out, as there were many fine pairs. I started out with the moon, and marveled at the scope's excellent contrast and all the fine detail visible. Jupiter looked good too. Moved on to more Struves.
STF 848 AB: 152; 150x: The main pairing of the "37" cluster, NGC 2169, it lays near the base of the "3" asterism. Nearly 1 Dm, A is light orange. Very pretty. 83% PRO, 2,625 AU WS, 5.8+4.7 Msol, it is probably binary and an orbit should be tried.
06h 08m 30.36s +13° 58' 15.8" P.A. 110.00 sep 2.6 mag 7.28,8.15 Sp B1V+B2V dist. 300.3 pc (979.58 l.y.)
STF 837 AB: 152; 125x: = STF833. Light orange-yellow A, 2 Dm very wide B. -68% PRO, it is not binary.
06h 03m 38.86s +04° 18' 50.3" P.A. 226.00 sep 19.6 mag 8.05,10.60 Sp A0
STF 844 AB: 152; 125x: Unequal, very wide pair. In the "37" cluster, NGC 2169. -79% PRO, it is not binary.
06h 08m 18.38s +13° 59' 50.3" P.A. 9.00 sep 23.4 mag 8.49,9.29 Sp B5
STF 854 AB: 152; 125x: Near equal, well separated white stars. -81% PRO, it is not binary.
06h 08m 32.08s +05° 48' 01.2" P.A. 321.00 sep 5.7 mag 8.81,9.78 Sp A2
STF 852 AB: 152; 150x: Very faint near equal, well separated, B seen with averted vision at first then can hold. 18% PRO, 3,010 AU WS, 1.8+1.5 Msol, and the RVD 0.9 < EV 1.4, it might be binary and an orbit is needed.
06h 08m 36.21s +07° 17' 50.0" P.A. 319.00 sep 9.3 mag 9.92,10.90 Sp F5
STF 849 AB: 152; 250x: Difficult, high power only, I see a distinct split of near equal stars. = STF828. Gaia DR3 lacks parallax data for the companion; given the close separation an orbit should be tried.
06h 08m 44.48s +17° 24' 07.0" P.A. 241.00 sep 0.9 mag 9.18,9.48 Sp G0
STF 856 AB: 152; 150x: 2 Dm, B appears with foveal coaxing then cab be held direct, well separated. 80% PRO, 5,079 AU WS, 3.0+1.7 Msol, it is possibly binary and needs an orbit.
06h 09m 07.83s +07° 03' 19.5" P.A. 50.00 sep 10.3 mag 8.50,10.99 Sp A0 dist. 373.13 pc (1217.15 l.y.)
STF 853 AB: 152; 125x: Faint but easily seen, wide, equal magnitude. -72% PRO, it is not binary.
06h 09m 09.51s +11° 39' 19.0" P.A. 8.00 sep 38.2 mag 8.49,8.98 Sp G5 dist. 134.77 pc (439.62 l.y.)
STF 859 AB: 152; 125x: Unequal white stars, very wide. = STF863. Gaia DR3 lacks parallax data for B, and there has been a linear solution found, it is not likely binary.
06h 09m 35.88s +05° 40' 07.6" P.A. 242.00 sep 45.2 mag 8.49,8.97 Sp G0 dist. 28.79 pc (93.91 l.y.)
STF 867 AB: 152; 150x: Exquisite close pair, 1 Dm, A is light blue. There is a third star, wide, approximately same magnitude as B. 5% PRO with 3% error, only 762 AU WS, 3.1+2.4, it might be binary and an orbit should be tried.
06h 11m 39.01s +17° 22' 39.3" P.A. 159.00 sep 2.3 mag 7.53,8.88 Sp B9.5III
STF 877 AB: 152; 125x: Near equal white stars, well split. 5% PRO, 1,114 AU WS, 2.4+2.1 Msol, and RVD 0.5 < EV 2.7, there is some chance it's binary and an orbit should be tried.
06h 14m 42.67s +14° 35' 10.8" P.A. 263.00 sep 5.7 mag 7.55,7.96 Sp B9.5V dist. 150.83 pc (492.01 l.y.)
STF 880 AB: 152; 125x: B seen with averted vision, close separation. -3% PRO with 3% error, and while the other data are promising it is not likely binary.
06h 15m 29.13s +10° 34' 42.4" P.A. 55.00 sep 5.6 mag 8.40,8.71 Sp G5
STF 885 AB: 152; 125x: Quite a delicate pair, unequal, well split, at the bottom of a U-shaped arrangement of stars like CrB constellation asterism. 76% PRO, 8,715 AU WS, 3.6+2.4 Msol, so there is some possibility it is binary and needs an orbit.
06h 16m 51.65s +05° 59' 45.6" P.A. 297.00 sep 10.1 mag 8.99,10.52 Sp A0
STF 891 AB: 152; 125x: Very faint B seen averted vision only, wide. 36% PRO, 8,213 AU WS, 3.2+1.4 Msol, it is possible they are binary and an orbit is needed.
06h 19m 41.14s +12° 17' 33.7" P.A. 294.00 sep 22.0 mag 7.67,11.30 Sp B8V dist. 400 pc (1304.8 l.y.)
STF 895 AB: 152; 125x: Very faint, wide. V1056 Ori. -84% PRO, it is not binary.
06h 20m 48.34s +05° 44' 26.2" P.A. 58.00 sep 29.1 mag 8.26,9.62 Sp M3Ib-II dist. 884.96 pc (2886.74 l.y.)
STF892 AB: 152; 125x: Very faint, very wide. -94% PRO, it is not binary.
06h 19m 51.49s +12° 17' 34.8" P.A. 41.00 sep 39.5 mag 10.54,10.75 Sp K2V+A0
STF 898 AB: 152; 125x: Unequal wide pair. 51% PRO, 4,985 AU WS, 3.5+3.0 Msol, it is possibly binary and needs an orbit.
06h 21m 57.42s +10° 58' 16.5" P.A. 122.00 sep 6.2 mag 9.00,9.61 Sp B8
STF 901 AB: 152; 125x: Unequal wide pair. -82% PRO, it is not binary.
06h 25m 00.98s +10° 31' 03.3" P.A. 246.00 sep 20.0 mag 7.84,10.38 Sp B9IV dist. 1265.82 pc (4129.1 l.y.)
STF 822 AB: 152; 125x: Wide 2 Dm pair. 62% PRO, very wide 12,819 AU WS, 4.2+2.0 Msol, but the RVD 3.1 > EV 0.9, it is not binary.
06h 00m 14.04s +43° 10' 53.0" P.A. 56.00 sep 15.1 mag 8.29,10.80 Sp B9
STF 825 AB: 152; 125x: 2 Dm, well separated, faint B seen averted vision then can hold direct. 17% PRO, 1,974 AU WS, 2.5+1.8 Msol, there is some chance it is binary and needs an orbit.
06h 01m 37.21s +36° 30' 55.7" P.A. 146.00 sep 8.0 mag 7.90,9.08 Sp A0 dist. 66.49 pc (216.89 l.y.)
STF1086 AB: 152; 125x: Faint unequal wide pair. -59% PRO, it is not binary.
07h 28m 31.32s +42° 45' 09.0" P.A. 103.00 sep 12.2 mag 8.01,10.11 Sp K0 dist. 317.46 pc (1035.55 l.y.)
STF1079 AB: 152; 125x: Very faint unequal pair, wide. 65% PRO, 1,434 AU WS, 1.7+1.3 Msol, it is likely binary and needs an orbit.
07h 24m 35.82s +37° 48' 41.0" P.A. 333.00 sep 5.6 mag 9.45,10.40 Sp A5
STF1042 AB: 152; 125x: 2 Dm, well separated. 19% PRO, 3,944 AU WS, 2.0+1.2 Msol, it might be binary and needs an orbit.
07h 15m 53.23s +42° 08' 54.8" P.A. 42.00 sep 11.9 mag 9.86,11.05 Sp K0
STF1024 AB: 152; 200x: At high power only, touching disks with momentary to hairline splits, near equal magnitude stars. Gaia DR3 lacks parallax data for the secondary. Due to its closeness, an orbit should be tried.
07h 10m 12.99s +38° 07' 50.2" P.A. 315.00 sep 1.4 mag 8.97,9.16 Sp G0
STF1021 A-BC: 152; 150x: Faint pair, equal, closely separated. Gaia DR3 lacks parallax data for the secondary, but it's not likely binary.
07h 09m 38.52s +38° 28' 27.1" P.A. 17.00 sep 4.0 mag 9.54,9.60
