Sunday, February 5, 2023

25 january 2023

Had a pretty decent night.  Not the best seeing so I masked down the 20-inch to 7-inches and stuck to my Struve list.  A lot of wide, faint pairs which I would be surprised are binary.  Pointing accuracy is still well off, so I'll have to redo the TPAS as some point.  But with so much cloudy weather this winter, it's anyone's guess when this will be.

STF 900 AB: 178; 125x: Dull white primary and dull yellow, 1 Dm, well split secondary.  WDS says Parallax indicates components are physical, but in fact there is no parallax range overlap with Gaia DR3, -29%, so in spite of the narrow 501 AU weighted separation, it is not likely this is binary.
06h 23m 46.10s +04° 35' 34.2" P.A. 30.00 sep 12.2 mag 4.42,6.64 Sp A5IV+F5V dist. 37.5 pc (122.32 l.y.)

STF 953 AB: 178; 125x: Pretty light orange A and dull white B, near equal, well separated.  WDS uncertain, but there is -52% parallax range overlap, it is not binary.
06h 41m 09.41s +08° 59' 05.0" P.A. 330.00 sep 7.3 mag 7.10,7.66 Sp F5 dist. 497.51 pc (1622.88 l.y.)

STF 954 AB: 178; 125x: Equal pair, well separated.  WDS says not physical, but I can't find the correct stars in Gaia.
06h 41m 09.60s +09° 27' 57.5" P.A. 153.00 sep 12.9 mag 7.15,10.23 Sp B2III:

STF1110 AB: 178; 125x: Castor. Blazing white A, nearly 2 Dm close but separated B.  WDS grade 3 orbit with 459.8-year period, there is no parallax data for the primary.  
07h 34m 35.86s +31° 53' 17.8" P.A. 51.60 sep 5.4 mag 1.93,2.97 Sp A1V+A4Vm dist. 15.6 pc (50.89 l.y.)

STF1123 AB: 178; 175x: What is at first an elongated faint smudge resolves with seeing to two hard points, near equal, nice close separation, faint pair.  WDS says parallax indicates physical, and indeed there is 89% parallax range overlap with nearly no error, only 402 AU weighted separation, 1.3+1.1 Msol, so it is very likely to be binary and needs an orbital solution.
07h 41m 31.99s +33° 24' 34.8" P.A. 167.00 sep 3.6 mag 9.25,9.79 Sp F8

STF1119 AB: 178; 175x: Close pair around 3", 1 Dm.  WDS uncertain, but there is 25% parallax range overlap, only 302 AU weighted separation, 1.5+1.1 Msol, so it may well be binary and needs an orbital solution.
07h 38m 30.23s +33° 42' 41.4" P.A. 353.00 sep 3.3 mag 8.08,9.35 Sp F0 dist. 161.81 pc (527.82 l.y.)

STF1070 AB: 178; 175x: Very faint pair, close split around 2", 2 Dm.  WDS uncertain, but there is no parallax range overlap, -59%, it is not binary.
07h 21m 21.87s +34° 01' 36.2" P.A. 324.00 sep 1.7 mag 8.65,9.30 Sp A0 dist. 418.41 pc (1364.85 l.y.)

STF1135 AB: 178; 125x: Very bright A and very faint wide B.  WDS uncertain, but there is -78% parallax range overlap, it is not binary.
07h 47m 30.34s +33° 24' 57.8" P.A. 214.00 sep 19.6 mag 5.14,11.40 Sp M1IIIa dist. 202.84 pc (661.66 l.y.)

STF1037 AB: 178; 400x: Nice short period, hairline split, slight delta mag.  Suspected as double even with lower powers and in poor seeing.  WDS grade 2 orbit, 118.35-year period, it is rapidly closing and will be undetectable in the 2030s as it makes an extremely close periastron, widening again in 2046.  It's a good one to keep an eye on.  No Gaia data for the primary.  
07h 12m 49.08s +27° 13' 30.2" P.A. 301.60 sep 0.8 mag 7.24,7.27 Sp F8V dist. 42.48 pc (138.57 l.y.)

STF1012 AB: 178; 125x: White stars, slight delta, wide separation.  WDS says parallax indicates physical, and there is 21% parallax range overlap, 1,050 AU weighted separation, 1.1+0.9 Msol, and the radial velocity delta 0.5 is less than the escape velocity 1.9, so it may well be binary and needs and orbital solution.
07h 04m 54.51s +28° 07' 01.3" P.A. 168.00 sep 12.8 mag 9.20,9.83 Sp G0

STF 981 AB: 508; 400x: Near equal white stars, appear as hard points within fuzzy diffraction, more than hairline split.  WDS grade 5 orbital solution, 1089.7-year period.  Unfortunately, there is no parallax data on Gaia.
06h 55m 28.54s +30° 09' 42.3" P.A. 114.80 sep 0.9 mag 8.72,8.97 Sp G0 dist. 38.49 pc (125.55 l.y.)
STF 957 AB: 178; 200x: 2 Dm, closely split pair.  WDS uncertain, but there is 100% parallax range overlap (!) with only 3% error, 371 AU weighted separation, 1.7+1.1 Msol.  It might be binary and needs an orbital solution.
06h 45m 10.02s +30° 49' 33.5" P.A. 91.00 sep 3.6 mag 7.45,9.40 Sp A0 dist. 80.97 pc (264.12 l.y.)

STF 830 AB: 178; 125x: Slightly unequal wide pair.  WDS says proper motion indicates non-physical, but even worse is there is no parallax range overlap, -96%, it is not binary.
06h 03m 26.56s +27° 38' 32.7" P.A. 264.00 sep 11.4 mag 8.90,9.55 Sp F2

STF 860 AB: 178; 125x: 1 Dm, fairly well separated.  WDS is uncertain, but there is 26% overlap of the parallax range, 3,677 AU weighted separation, 3.3+2.4 Msol, so there is some chance it is binary and should have an orbital solution.
06h 11m 04.87s +24° 52' 56.3" P.A. 358.00 sep 5.9 mag 8.64,9.81 Sp B9 dist. 2222.22 pc (7248.88 l.y.)

STF 886 AB: 178; 125x: Very faint, 2 Dm pair, nearly need averted vision to see B, fairly close 5".  WDS uncertain, but there is no overlap of the parallax ranges, -94%, it is not binary.
06h 18m 57.74s +23° 16' 30.6" P.A. 194.00 sep 4.8 mag 10.20,12.20

STF 889 AB: 178; 125x: Wide separation, > 1 Dm.  WDS says parallax indicates not physical, and there is -94% parallax range overlap, it is not binary.
06h 19m 51.77s +25° 00' 49.1" P.A. 244.00 sep 21.3 mag 7.60,9.90 Sp K2

STF 897 AB: 178; 125x: Easy near equal white wide pair.  WDS says it is physical, but there is no parallax range overlap, -20%, it is not binary.
06h 22m 25.95s +26° 40' 08.4" P.A. 349.00 sep 18.0 mag 8.76,8.95 Sp A0 dist. 4347.83 pc (14182.62 l.y.)

STF 899 AB: 178; 200x: Close split, a little more than 1 Dm, white stars, nice.  WDS uncertain, but there is 41% parallax range overlap, 624 AU weighted separation, 3.0+2.5 Msol, so it likely is binary and needs an orbital solution.
06h 22m 49.64s +17° 34' 27.3" P.A. 17.00 sep 2.2 mag 7.41,8.01 Sp A0V dist. 325.73 pc (1062.53 l.y.)

STF 913 AB: 178; 125x: 1 Dm, quite wide.  WDS says not physical, but in fact there is 72% overlap of the parallax ranges, 11,291 AU weighted separation, 2.6+1.7 Msol.  The radial velocity delta 1.4 exceeds the 0.8 escape velocity, so it probably is not binary.
06h 27m 55.33s +15° 41' 40.5" P.A. 49.00 sep 31.2 mag 8.41,10.49 Sp B9

STF 924 AB: 178; 125x: Easy wide bright pair, slight delta.  WDS says parallax indicates physical, and there is a mere 8% overlap of the parallax ranges, 1,845 AU weighted separation, 2.3+1.9 Msol, and the radial velocity delta 0.8 is less than the escape velocity 2.0, so it might be binary and needs an orbital solution.
06h 32m 18.52s +17° 47' 03.4" P.A. 212.00 sep 19.9 mag 6.31,6.88 Sp F8III dist. 80.26 pc (261.81 l.y.)

STF 932 AB: 178; 250x: With seeing, near equal pair, more than a hairline split.  WDS grade 5 orbital solution 2360-years.  But, there is no overlap of the parallax ranges, -21%, so in spite of the close 150 AU weighted separation, this is not likely binary.
06h 34m 21.57s +14° 45' 08.3" P.A. 298.40 sep 1.6 mag 8.31,8.54 Sp F5 dist. 80.06 pc (261.16 l.y.)

STF 942 AB: 178; 125x: Faint pair, wide, slightly unequal.  WDS says parallax indicates physical, and there is 7% overlap of the parallax ranges, 982 AU weighted separation, 1.6+1.6 Msol, so it is possibly binary and needs an orbital solution.
06h 37m 40.87s +23° 38' 54.2" P.A. 246.00 sep 3.5 mag 10.07,10.10 Sp F0

STF 943 AB: 178; 125x: Wide, 2 Dm.  WDS says not physical, and there is -97% overlap of the parallax ranges, it is not binary.
06h 37m 47.00s +23° 10' 36.0" P.A. 135.00 sep 31.1 mag 9.17,9.42 Sp G0

STF 947 AB: 178; 125x: Wide, 1 Dm.  WDS says it's physical, but there is no overlap of the parallax ranges, -84%, it is not binary.
06h 40m 23.39s +19° 25' 24.2" P.A. 175.00 sep 18.7 mag 8.77,10.76 Sp A2

STF 959 AB: 178; 125x: Very slight delta mag, well split.  In a rich field.  WDS says it's physical, and there is 52% overlap of the parallax ranges, 2,612 AU weighted separation, 1.5+1.4 Msol, and the radial velocity delta 0.3 is less than the escape velocity 1.4, so it is likely binary and needs an orbital solution.
06h 44m 57.18s +13° 45' 38.0" P.A. 175.00 sep 11.8 mag 9.86,10.13 Sp G5

STF 962 AB: 178; 125x: Very wide near equal faint pair.  WDS says it's not physical, and there is -20% parallax range overlap, it is not binary.
06h 48m 10.72s +26° 42' 22.9" P.A. 242.00 sep 25.9 mag 9.31,9.47 Sp A0

STF961 AB: this is the same as STF 962.

STF 976 AB: 178; 125x: One of the many possible faint wide stars in the field.  WDS says it's physical, and there is 36% overlap of the parallax ranges, 8,340 AU weighted separation, 1.8+1.5 Msol, so maybe it's binary...
06h 51m 21.89s +18° 40' 00.3" P.A. 118.00 sep 35.7 mag 9.13,10.25 Sp A2

STF 982 AB: 178; 125x: Bright yellow A and orange B, nice separation and large delta mag.  WDS grade 4 orbit, 1750-year period.  No parallax data for the primary.
06h 54m 38.63s +13° 10' 40.1" P.A. 142.40 sep 7.4 mag 4.75,7.80 Sp F0Vp dist. 25.63 pc (83.61 l.y.)

STF 991 AB: 178; 125x: Closely split, 2 Dm, dull white A and yellow B, nice pair.  WDS uncertain, and there is no overlap of the parallax ranges, -24%, it is not binary.
06h 57m 01.26s +24° 57' 27.9" P.A. 165.00 sep 3.8 mag 7.95,9.21 Sp A0 dist. 225.73 pc (736.33 l.y.)

STF1007 AB: 178; 125x: B is seen with averted vision, fairly wide, which WDS says proper motion indicates is not physical, and there is -88% overlap of the parallax ranges, it is not binary.  There is a wide white star near equal to A, this is the AD pair, which WDS says parallax indicates is physical, and there is 11% parallax range but a very far 20,587 AU weighted separation, 3.0+2.8 Msol, and the 0.4 radial velocity delta is less than the 0.7 escape velocity, so maybe it is binary but very unusual for the weighted separation.  For completeness, the AC pair is not binary either, -91% parallax range overlap.
07h 00m 37.12s +12° 43' 24.2" P.A. 300.00 sep 14.6 mag 7.43,11.40 Sp A2V dist. 280.11 pc (913.72 l.y.)
07h 00m 37.12s +12° 43' 24.2" P.A. 28.00 sep 67.7 mag 7.43,7.74 Sp A2V dist. 280.11 pc (913.72 l.y.)

STF1014 AB: 178; 300x: Close split, with seeing, slightly unequal.  WDS uncertain, but there is 72% overlap of the parallax ranges, only 391 AU weighted separation, 1.4+1.4 Msol, and the radial velocity delta 0.1 is less than the escape velocity 3.6, so it is likely binary and needs an orbital solution.
07h 05m 44.95s +26° 08' 25.3" P.A. 221.00 sep 2.0 mag 9.91,9.93 Sp F8

STF1017 AB: 178; 125x: 1 Dm, pretty wide.  WDS says it's physical, but there is no overlap of the parallax ranges, -52%, it is not binary.
07h 07m 10.44s +16° 50' 21.8" P.A. 255.00 sep 12.8 mag 9.32,10.25 Sp G+F8

STF1023 AB: 178; 125x: Wide separation, white stars, slight delta mag.  WDS says not physical, and there is 21% overlap of the parallax ranges, but with a very far 21,927 AU weighted separation, 4.6+4.3 Msol, and the radial velocity delta 0.1 is less than the escape velocity 0.8, it has some chance of being binary and needs an orbital solution.   
07h 08m 31.61s +24° 59' 27.4" P.A. 105.00 sep 24.3 mag 8.91,9.44 Sp K5

STF1027 AB: 178; 125x: Near equal, well separated.  WDS says it's physical, and remarkably (since they are so widely separated) there is 24% parallax range overlap, 1,777 AU weighted separation, 2.5+2.3 Msol, and the radial velocity delta 0.3 is less than the escape velocity 2.2, so an orbital solution should be tried.
07h 08m 46.74s +16° 54' 31.8" P.A. 356.00 sep 6.9 mag 8.47,8.69 Sp K3III dist. 312.5 pc (1019.38 l.y.)

STF1035 AB: 178; 125x: Near equal, well separated, light yellow stars.  WDS says proper motion indicates physical, and there is 58% parallax range overlap, 1,046 AU weighted separation, 1.7+1.6 Msol, and the radial velocity delta 0.2 is less than the escape velocity 2.4, so an orbital solution should be tried.
07h 12m 01.06s +22° 16' 44.5" P.A. 40.00 sep 8.7 mag 8.09,8.38 Sp F7IV dist. 163.67 pc (533.89 l.y.)

STF1041 AB: 178; 125x: Wide pair, very faint, need averted vision to see B, around 2 Dm.  WDS says not physical, and there is -78% parallax range overlap, it is not binary.
07h 13m 50.82s +17° 46' 01.6" P.A. 267.00 sep 25.6 mag 9.36,11.98 Sp A0

STF1047 A-BC: 178; 125x: Wide, >1 Dm, faint pair.  BC is A2526, 0.3", not attempted.  WDS says proper motion indicates not physical.  There is no Gaia parallax data for the secondary.
07h 14m 20.05s +15° 45' 33.5" P.A. 30.00 sep 24.1 mag 8.07,9.66 Sp A5III

STF1046 AB: 178; 125x: Very faint, need averted vision to see B, well separated.  WDS says it's not physical, and there is no overlap of the parallax ranges, -89%, it is not binary.
07h 14m 38.43s +14° 33' 41.1" P.A. 244.00 sep 9.3 mag 9.41,12.50 Sp A4V

STF1053 AB: 178; 125x: Bright white A and 3 Dm wide B.  WDS says it's not physical, and there's -91% overlap of the parallax ranges, it is not binary.
07h 16m 48.52s +24° 32' 10.7" P.A. 316.00 sep 13.9 mag 7.35,10.83 Sp A0 dist. 163.67 pc (533.89 l.y.)

STF1061 AB: 178; 125x: B is very finely separated from blazing white A.  WDS uncertain, but there is 14% overlap of the parallax ranges, only 301 AU weighted separation, 2.3+0.6 Msol, so it might be binary and an orbital solution should be tried.
07h 18m 05.61s +16° 32' 25.7" P.A. 34.00 sep 9.9 mag 3.58,10.70 Sp A3V dist. 30.93 pc (100.89 l.y.)

STF1068 AB: 178;125x: Delicate pair, slight delta mag, nice close split.  WDS says it's not physical, but there is 46% parallax range overlap, 913 Msol, 1.7+1.6 Msol, so it is possible to be binary and an orbital solution should be tried.
07h 19m 49.31s +13° 22' 22.4" P.A. 350.00 sep 4.1 mag 9.29,9.80 Sp A2

STF1083 AB: 178; 125x: White stars, nearly 2 Dm, well split, attractive pair.  WDS uncertain, but there is -10% overlap of the parallax ranges, so in spite of the close 810 AU weighted separation and 2.0+1.7 Msol, it is not likely to be binary.
07h 25m 35.30s +20° 29' 42.6" P.A. 226.00 sep 6.9 mag 7.32,8.13 Sp A5 dist. 132.45 pc (432.05 l.y.)

STF1088 AB: 178; 125x: Rather a small cluster with two other faint wide pairing seen.  AB is 2 Dm, well separated around 10".  WDS uncertain, but there is -27% parallax range overlap, it is not binary.
07h 26m 02.42s +14° 06' 10.7" P.A. 195.00 sep 10.9 mag 7.38,9.37 Sp A0V dist. 458.72 pc (1496.34 l.y.)

STF1087 CD: 178; 125x: Part of the STF1088 cluster.  3 Dm, need averted vision to see D, wide around 20".  WDS says proper motion indicates not physical.
07h 25m 55.83s +14° 05' 10.9" P.A. 38.00 sep 23.3 mag 8.71,11.77 Sp A2

STF1078 = seems to be the same as STF1088AB

STF1089 AB: 178; 125x: Near equal white stars, wide around 8".  WDS says they're not physical, but they have 38% overlap of their parallax ranges, 2.2+2.1 Msol, so they might be binary and need an orbital solution tried.
07h 26m 11.97s +14° 50' 25.3" P.A. 7.00 sep 7.2 mag 8.87,8.93 Sp A2 dist. 180.51 pc (588.82 l.y.)

STF1090 AB: 178; 125x: 1 Dm and very wide.  WDS says it's physical, but they don't overlap parallax ranges at all, they are not binary.
07h 26m 27.33s +18° 31' 00.8" P.A. 98.00 sep 60.8 mag 7.27,8.17 Sp F2V dist. 112.23 pc (366.09 l.y.)

STF1094 AB: 178; 250x: Fine pair, 1 Dm, very closely split. WDS uncertain, but they have 63% parallax range overlap, only 985 AU weighted separation, 3.4+2.7 Msol, so they may be binary and need an orbital solution.
07h 27m 25.99s +15° 18' 59.0" P.A. 97.00 sep 2.5 mag 7.58,8.52 Sp A0V dist. 507.61 pc (1655.82 l.y.)

STF1106 AB: 178; 125x: Near equal, well separated pair, around 10".  WDS says parallax indicates physical, but as seems often the case they are wrong, there is not parallax range overlap, -46%, it is not binary.
07h 31m 21.02s +16° 18' 38.6" P.A. 35.00 sep 10.7 mag 9.40,9.47 Sp G0

STF1108 AB: 178; 125x: Well-separated, 2 Dm, light yellow A, B is blue.  WDS says parallax indicates non-physical, and they are wrong again: 76% parallax range overlap, 2,286 AU weighted separation, 3.2+1.8 Msol, so these are likely binary and need an orbital solution tried. 
07h 32m 50.63s +22° 53' 15.4" P.A. 179.00 sep 11.7 mag 6.62,8.21 Sp G8III dist. 136.61 pc (445.62 l.y.)

STF1116 AB: 178; 200x: Very close split, 1 Dm.  WDS uncertain, but there is no parallax range overlap, -25%, they are not binary.
07h 34m 32.02s +12° 18' 16.9" P.A. 95.00 sep 1.7 mag 7.81,8.50 Sp B8 dist. 248.14 pc (809.43 l.y.)

STF1124 AB: 178; 125x: Near equal wide pair.  WDS says proper motion indicates physical, but there is just 3% parallax range overlap (with 1% error), a pretty far 6,497 AU weighted separation, 2.2+2.1 Msol, and the radial velocity delta 0.2 is less than the escape velocity 1.1.  There is some chance of it being binary and an orbital solution should be tried. 
07h 40m 58.42s +21° 47' 48.1" P.A. 325.00 sep 19.3 mag 9.11,9.28 Sp A0

A2876 AB: 178; 300x: Split with seeing, very close pair 1", 1 Dm.  WDS uncertain, but there is 43% parallax range overlap, 512 AU weighted separation, 2.9+2.1 Msol, so it is likely binary and needs an orbital solution.
07h 41m 42.64s +18° 03' 11.6" P.A. 196.00 sep 0.9 mag 8.91,10.15 Sp G4IV dist. 751.88 pc (2452.63 l.y.)

STF1129 AC: 178; 125x: Wide pair, 1 Dm.  A2876 is AB.  WDS uncertain, but there is 65% parallax range overlap, pretty wide 10,434 AU weighted separation, 2.9+2.3 Msol, but the radial velocity delta 1.6 exceeds the escape velocity 0.9.  So it's probable the C star formed in the same cloud as AB but is being spun away from it. 
07h 41m 42.64s +18° 03' 11.6" P.A. 64.00 sep 21.7 mag 8.91,9.68 Sp G4IV dist. 751.88 pc (2452.63 l.y.)

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