Monday, November 21, 2022

15 november 2022 perseus struves

With the 6-inch f/15 refractor again.  Some haze in the hair and imperfect seeing, but still good enough to continue Struves in Perseus.

STF 351 AB: 152; 125x: Near equal white pair, wide.  WDS says not physical, and there is no overlap of the parallax ranges, -90%, is it not binary.
03h 09m 02.75s +44° 15' 06.4" P.A. 115.00 sep 27.1 mag 9.18,9.87 Sp A0

STF 352 AB: 152; 250x: Very closely separated, 2 Dm, B seen with averted vision only.  WDS says physical, and there is 64% overlap of the parallax ranges, only 514 AU weighted separation, 1.9+1.1 Msol, and the radial velocity delta 1.6 is less than the escape velocity 3.2, it is very likely binary and needs an orbit.
03h 08m 45.91s +35° 27' 31.1" sep 3.9 mag 7.80,9.65 Sp A0 dist. 155.52 pc (507.31 l.y.)

STF 360 AB: 152; 125x: Closely separated yellow-white pair, slight magnitude difference, pretty nice.  WDS grade 4 orbit 1500-year period.  But, there is no overlap of the parallax ranges, -9%, so in spite of the close weighted separation of 130 AU and 1.1+1.0 Msol, it probably is not binary.
03h 12m 09.59s +37° 13' 03.3" P.A. 124.70 sep 3.0 mag 8.02,8.29 Sp G0 dist. 39.92 pc (130.22 l.y.)

STF 361 AB: 152; 125x: B is seen just barely with direct vision, brighter with averted vision, well split, with STF360 on the edge of the FOV.  WDS says proper motion indicates physical, and there is 54% overlap of the parallax ranges, 3,931 AU weighted separation, 2.4+1.7 Msol, but the radial velocity delta 1.5 is slightly above the escape velocty 1.4, so needs an orbit to check.
03h 12m 19.25s +36° 59' 47.2" P.A. 15.00 sep 10.6 mag 8.98,11.02 Sp A0

STF 364 AB: 152; 125x: Near equa, well separated pair.  WDS says parallax indicates physical, and there is 33% overlap of the parallax ranges, 1,602 AU weighted separation, 1.5+1.5 Msol, and the radial velocity delta 0.2 is less than the escape velocity 1.8, so it is likely binary and needs an orbit.
03h 13m 35.34s +39° 08' 41.5" P.A. 311.00 sep 11.7 mag 8.73,8.92 Sp F0 dist. 178.89 pc (583.54 l.y.)

STF 369 AB: 152; 125x: Brilliant white stars, fairly close, 1 Dm, nice.  WDS uncertain, and there is no overlap of the parallax ranges, -40%, it is not binary.
03h 17m 11.45s +40° 28' 58.6" P.A. 29.00 sep 3.6 mag 6.83,7.72 Sp B9VpSi dist. 197.63 pc (644.67 l.y.)

STF 370 AB: 152; 125x: Light orange A, 3 Dm B seen with averted vision only, wide.  WDS says not physical, and there is no overlap of the parallax ranges, -95%, not binary.
03h 16m 35.60s +32° 38' 14.4" P.A. 320.00 sep 16.9 mag 8.88,11.00 Sp K0

STF 371 AB: 152; 200x: Pretty difficult in poor seeing, light yellow-orange A and much fainter, 3 Dm B seen averted vision only, very closely split with seeing.  WDS says it is physical, and there is 57% overlap of the parallax ranges, only 631 AU weighted separation, 1.9+1.3 Msol, and the radial velocity delta 1.5 is less than the escape velocity 3.0, so it is likley binary and needs an orbit.
03h 18m 40.61s +47° 01' 31.6" P.A. 89.00 sep 3.2 mag 8.50,10.55 Sp F0 dist. 179.21 pc (584.58 l.y.)

STF 372 AB: 152; 125x: Faint, near equal, wide, in a steream of similar stars.  WDS says proper motion indicates not physical, but there is 46% overlap of the parallax ranges, 2,682 AU weighted separation, 1.7+1.6 Msol, so it might be binary.
03h 19m 18.52s +45° 57' 04.7" P.A. 292.00 sep 7.7 mag 10.19,10.58 Sp A9V dist. 500 pc (1631 l.y.)

STF 382 AB: 152; 200x: Bright white A, tremulous in poor seeing, can see closely separated B with foveal coaxing only.  WDS says it is physical, but there is no overlap of the parallax ranges, -25%, it is not likely binary.
03h 24m 29.68s +33° 32' 09.7" P.A. 153.00 sep 4.7 mag 5.80,9.25 Sp A0V dist. 133.51 pc (435.51 l.y.)

STF 386 AB: 152; 200x: Very closely separated near equal pair, with seeing.  WDS says proper motion indicates physical, and there is 74% overlap of the parallax ranges, only 783 AU weighted separation, 1.9+1.9 Msol, and the radial velocity delta 0.1 is less than the escape velocity 2.9, so it is likely binary and needs an orbit.
03h 28m 02.19s +55° 10' 29.2" P.A. 59.00 sep 2.7 mag 9.46,9.60 Sp A2

STF 388 AB: 152; 125x: Pretty light yellow A and blue B, 1 Dm, closely separated, field has many faint stars wanting to show more. Near Mirfak.  WDS uncertain, but there is 77% overlap of the parallax ranges, only 491 AU weighted separation, 2.1+1.7 Msol, so it is likely binary and needs an orbit.
03h 28m 40.39s +50° 26' 10.8" P.A. 214.00 sep 2.8 mag 8.04,9.01 Sp F0 dist. 130.04 pc (424.19 l.y.)

STF 391 AB: 152; 125x: Stunning ice blue A and pale gold B, closely separated, 1 Dm.  WDS uncertain, and there is -26% overlap of the parallax ranges, surprisingly it is not likely binary.
03h 29m 13.74s +45° 02' 57.5" P.A. 96.00 sep 3.9 mag 7.60,8.32 Sp B2IV dist. 1111.11 pc (3624.44 l.y.)

STF 392 AB: 152; 125x: Light orange A and faint blue B, wide.  WDS says proper motion indicates it is physical, and there is 6% overlap of the parallax ranges, 6,067 AU weighted separation, 3.1+1.4 Msol, but the radial velocity delta 3.9 is greater than the escape velocity 1.1, so it is likely not binary.
03h 30m 17.71s +52° 53' 41.3" P.A. 347.00 sep 25.8 mag 7.45,10.34 Sp K0 dist. 212.31 pc (692.56 l.y.)

STF 410 AB: 152; 125x: Very faint B seen with averted vision only, wide.  WDS uncertain, but there is no overlap of the parallax ranges, -23%, it is not binary
03h 35m 01.16s +32° 01' 00.7" P.A. 213.00 sep 5.1 mag 6.71,10.70 Sp F5V dist. 75.24 pc (245.43 l.y.)

STF 413 AB: 152; 200x: Faint near equal pair, split with seeing only.  WDS uncertain, but there is 64% overlap of the parallax ranges, only 410 AU weighted separation, 1.5+1.5 Msol, and the radial velocity delta 0.1 is less than the escape velocity 3.6, it is likely binary and needs an orbit.
03h 35m 23.04s +33° 40' 33.4" P.A. 126.00 sep 2.4 mag 9.29,9.30 Sp F0 dist. 167.22 pc (545.47 l.y.)

STF 425 AB: 152; 200x: Light yellow stars, significant delta, split with seeing.  WDS grade 4 orbit, 947-year period.  There is 69% overlap of the parallax ranges, only 91 AU weighted separation, 1.2+1.2 Msol, so it is certainly binary.
03h 40m 07.24s +34° 06' 59.3" P.A. 59.30 sep 1.7 mag 7.52,7.60 Sp F9V dist. 46.02 pc (150.12 l.y.)
STF 426 AB: 152; 125x: Wide 1 delta white stars.  WDS says proper motion indicates physical, but there is no overlap of the parallax ranges, -47%, so it is not binary
03h 40m 50.17s +39° 07' 01.7" P.A. 341.00 sep 19.6 mag 8.68,9.39 Sp A7IV dist. 266.67 pc (869.88 l.y.)

STF 431 AB: 152; 125x: Bright yellow-orange A with a wide faint companion, 4 Dm.  WDS uncertain, but there is 78% overlap of the parallax ranges, 7,335 AU weighted separation, 6.0+1.8 Msol.  The secondary is a little far from the primary but there's a lot of mass in the system, so it could be binary and needs an orbit.
03h 42m 22.64s +33° 57' 54.1" P.A. 239.00 sep 19.9 mag 4.97,10.04 Sp B1.5IV dist. 323.62 pc (1055.65 l.y.)

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