Sunday, July 14, 2024

8 july 2024

Observed with the 6-inch for a little more than an hour.  Seeing was not good at all -- it was actually windy at ground level.  I went after mostly wider pairs, and skipped those which were too close or had too large a delta magnitude.  Eventually, for the last couple of observations, I was not resolving pairs very well though I should have been able to quite easily.  Not knowing why, I looked up to find the marine layer had covered the sky and was moving rapidly with the wind.  At least we had a break from the hot weather!

STFA 37 AB-CD: 152; 125x: One of the double-double. STF 2382 CD split closely, near equal, through choppy seeing.  55% PRO, 119 AU WS, 2.1+1.7 Msol, it is likely binary.  The two do share similar parallax, so they may indeed be orbiting each other.
18h 44m 22.78s +39° 36' 45.8" P.A. 75.00 sep 2.3 mag 5.25,5.38 Sp A8Vn+F0Vn dist. 47.69 pc (155.56 l.y.)
STF 2382 AB: 152; 125x: Close split, 1 Dm.  21% PRO, 117 AU WS, 2.0+1.9 Msol, it is likely binary.  
18h 44m 20.34s +39° 40' 12.4" P.A. 345.00 sep 2.2 mag 5.15,6.10 Sp A4V+F1V dist. 49.78 pc (162.38 l.y.)

STF2380 AB: 152; 125x: Light orange A and wide B, 1 Dm.  71% PRO, 3,307 AU WS, 2.2+1.4 Msol, but RVD 2.2 > EV 1.4, it is not binary.
18h 42m 55.42s +44° 55' 30.9" P.A. 8.00 sep 25.5 mag 7.28,8.70 Sp G8III dist. 138.12 pc (450.55 l.y.)

STFA 38 AD: 152; 125x: White, 1 Dm, and super wide.  83% PRO, 2,119 AU WS, 2.5+1.8 Msol, and RVD 1.2 < EV 1.9, it is likely binary and needs an orbit.  The other pairs, like the Burnham, do not share parallax overlap.
18h 44m 46.36s +37° 36' 18.4" P.A. 150.00 sep 43.7 mag 4.34,5.62 Sp F0IVv dist. 47.69 pc (155.56 l.y.)

STFA 39 AB 152; 125x: Pretty 2 Dm pair, orange A.  62% PRO, 12,861 AU WS, 7.0+3.1 Msol, it is likely too far apart to be gravitationally held, and the radial velocities are different, but an orbit should be tried all the same. 
18h 50m 04.79s +33° 21' 45.6" P.A. 149.00 sep 45.7 mag 3.63,6.69 Sp B7Ve+A8p dist. 294.99 pc (962.26 l.y.)

STTA172 AB: 152; 125x: Super wide, near equal.  28% PRO, 3,569 AU WS, 1.2+1.0 Msol, and RVD 0.6 < EV 1.1, it is likely binary and needs an orbit.
18h 44m 30.74s +33° 59' 46.1" P.A. 5.00 sep 64.9 mag 7.91,8.66 Sp F8 dist. 53.94 pc (175.95 l.y.)

STF2349 AB: 152; 125x: 3 Dm, well separated.  48% PRO, 1,188 AU WS, 3.6+1.2 Msol, it might be binary and needs an orbit. 
18h 36m 37.34s +33° 28' 08.5" P.A. 204.00 sep 7.2 mag 5.39,9.40 Sp B8II-IIIp dist. 154.56 pc (504.17 l.y.)

STF2333 AB: 152; 125x: Half delta magnitude, wide.  -12% PRO, it is not binary.
18h 31m 06.94s +32° 14' 43.4" P.A. 333.00 sep 6.3 mag 7.82,8.57 Sp B9IV dist. 216.92 pc (707.59 l.y.)

STT 352 AB: 152; 125x: Wide 1 Dm pair.  30% PRO, 2,592 AU WS, 1.7+1.1 Msol, but RVD 1.6 > EV 1.4, it is not likely binary.
18h 26m 24.42s +46° 48' 32.2" P.A. 221.00 sep 24.2 mag 7.91,9.38 Sp F2 dist. 19.61 pc (63.97 l.y.)

SHJ 289 AB: 152; 125x: Super wide, 1 Dm.  -82% PRO, it is not binary.
19h 13m 29.33s +39° 02' 15.9" P.A. 56.00 sep 39.2 mag 8.01,8.71 Sp Ap

STF2474 AB: 152; 125x: One of the "other" double-double in Lyra.  Light orange A, 1 Dm, well separated B.  No Gaia parallax data for the secondary,
19h 09m 04.35s +34° 35' 59.9" P.A. 262.00 sep 16.0 mag 6.78,7.88 Sp G1V dist. 42.59 pc (138.93 l.y.)

STT 367 A-BC: 152; 125x: Slightly red A, wide, 2 Dm B.  -67% PRO, it is not binary.
19h 14m 29.19s +34° 33' 51.6" P.A. 226.00 sep 34.6 mag 7.31,10.26 Sp F5IV+K0V dist. 66.58 pc (217.18 l.y.)

STF2483 AB: 152; 125x: One of a squat rectangle asterism.  1 Dm, well split.  46% PRO, 4,319 AU WS, 3.2+2.4 Msol, it is possibly binary and an orbit should be tried.
19h 12m 23.60s +30° 20' 51.9" P.A. 317.00 sep 10.0 mag 7.97,9.09 Sp B9IV dist. 515.46 pc (1681.43 l.y.)

STT 371 AB: 152; 200x: Hairline split at best moments, uneven light yellow stars.  Unfortunately, no parallax data, but given their closeness and similarity, an orbit should be tried.
19h 15m 56.96s +27° 27' 21.4" P.A. 161.00 sep 0.9 mag 7.03,7.55 Sp B8V dist. 277.01 pc (903.61 l.y.)

STF2605 AB: 152; 200x: Gorgeous, split with 125x, pale white A and small white-red B, closely split, four delta, amazing view.  81% PRO, 254 AU WS, 2.9+1.6 Msol, it is very likely binary and needs an orbit.
19h 55m 37.82s +52° 26' 20.5" P.A. 175.00 sep 2.9 mag 5.03,7.52 Sp A4Vn dist. 86.28 pc (281.45 l.y.)

STF2486 AB: 152; 200x: Near equal light yellow stars, close split.  Also seen in the 60mm.  84% PRO, 189 AU WS, 1.1+1.1 Msol, and RVD 0.2 < EV 4.5, it is certainly binary.  SOC grade 4 orbit, 3100-year period.  
19h 12m 05.03s +49° 51' 20.7" P.A. 203.00 sep 7.0 mag 6.54,6.67 Sp G2V+G3V dist. 24.45 pc (79.76 l.y.)
STFA 46 AB: 152; 125x: Very pretty light yellow, wide, near equal stars.  Seen in the 60mm too.  72% PRO, 836 AU WS, 1.2+1.1 Msol, RVD 0.2 < EV 2.2, it is likely binary and needs an orbit.
19h 41m 49.09s +50° 31' 31.6" P.A. 133.00 sep 39.7 mag 6.00,6.23 Sp G1.5V dist. 21.08 pc (68.76 l.y.)

STF2611 AB: 152; 125x: Light orange near equal stars, well split.  Barely split 60mm 90x.  -33% PRO, it is not binary.
19h 58m 51.90s +47° 21' 48.2" P.A. 208.00 sep 5.2 mag 8.47,8.48 Sp K0 dist. 294.99 pc (962.26 l.y.)

LEP 94 AB: 152; 125x: Faint pair, 3 Dm, B picked out with averted vision, super wide.  1% PRO, 3,509 AU WS, 1.3+0.6 Msol, and RVD 2.3 > EV 1.0, it is not binary.
19h 49m 18.13s +41° 34' 56.8" P.A. 67.00 sep 66.8 mag 7.53,10.47 Sp F8V dist. 52.55 pc (171.42 l.y.)

STT 384 AB: 152; 250x: Near equal blue-white stars split at best moments.  -43% PRO, it is not binary.
19h 43m 47.09s +38° 19' 20.5" P.A. 196.00 sep 1.0 mag 7.59,8.23 Sp B5V dist. 675.68 pc (2204.07 l.y.)

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