Friday, April 26, 2019

a few more doubles

Was out again last night with Big Blue.  Seeing was good 7/10 but transparency was well off -- I had difficulty finding stars of even 8th magnitude.  So it ended up being only a short 1 hour session.

STF 1450: 277x White and slight yellow, ~6-7", nice pair.
10h 35m 02.16s +08° 39' 01.6" P.A. 156 sep 2.2 mag 5.80,7.90 Sp A2V dist. 131.41 pc (428.66 l.y.)

STT 227
: Faint reddish pair, near equal, just split but hazy, poor view.
10h 41m 41.58s +10° 44' 22.3" P.A. 2 sep 0.9 mag 8.27,8.77 Sp A2

STT 228: Not seen. Transparency too poor, stars too faint.

STF 1482: Not seen, can't find it

STF 1466: Orange and a little blue, wide separation, bright, half a delta mag. [AB seen. AC very wide separation]
10h 43m 20.91s +04° 44' 51.6" P.A. 239 sep 6.7 mag 6.23,7.13 Sp K3III dist. 169.49 pc (552.88 l.y.)

STF 1457: Near equal white, ~8". [Not seen -- WDS separation much closer]
10h 38m 43.14s +05° 44' 02.9" P.A. 333.9 sep 1.84 mag 7.69,8.16 Sp F5V dist. 65.4 pc (213.33 l.y.)

A2768: Feels like a not round disk, but uncertain. [Possible I saw it given the separation...]
10h 42m 37.53s +03° 34' 58.9" P.A. 239.6 sep 0.62 mag 6.92,8.45 Sp F7V dist. 71.38 pc (232.84 l.y.)

BU 1076: There's something in the diffraction but not resolved even in the best seeing. [Not seen; the suspected location in the diffraction would have meant ~2"; this separation too close]
10h 55m 42.40s +00° 44' 13.0" P.A. 50 sep 1.1 mag 5.98,9.02 Sp F4V dist. 44.86 pc (146.33 l.y.)

BU 599: !! Bright light orange star. As seeing resolves it to a disk and eliminates the diffraction, a tiny, faint star appears, planet-like, (~3") from the star. Only at the best moments; B helped by averted vision.
11h 06m 54.20s +01° 57' 19.9" P.A. 104 sep 2.7 mag 5.65,9.72 Sp G9IIICN dist. 63.21 pc (206.19 l.y.)

STF 1504: White near equal, ~2", nice.
11h 03m 58.93s +03° 38' 19.3" P.A. 123 sep 1.2 mag 7.92,8.05 Sp F0 dist. 221.73 pc (723.28 l.y.)

Tau Leo / STFA 19AB: Finder split; the A star is prismatic in color effects; bluish B
11h 27m 56.23s +02° 51' 22.5" P.A. 182 sep 88.1 mag 5.05,7.47 Sp G8II-III dist. 172.41 pc (562.4 l.y.)

STF 1540AB: Also a finder split, in same field as Tau. Fainter and a little more closer together.
11h 26m 45.32s +03° 00' 47.2" P.A. 149 sep 28.1 mag 6.55,7.50 Sp G7V dist. 17.75 pc (57.9 l.y.)

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