| Type | Binary Star |
|---|---|
| Magnitude | 7.77 | Right Ascension | 20h 9' 14.4" (2000) |
| Declination | 35° 29' 2" N |
| Constellation | Cygnus |
| Classification | B0IVp |
Andrew Cooper
Sep 6, 2021 Waikoloa, HI (map)
28cm f/10 SCT, NexStar 11" GyPSy @ 175x
Seeing: 7 Transparency: 7 Moon: 0%
A delicate double of a 7th and 8th magnitude pair separated by about 5", both white, at the center of the poor cluster Biurakan 2
Appears to be a true binary in Gaia DR2 data as proper motion and parallax match
| b1 Cygni | Barnard 147 | Berkeley 50 |
| Biur1 | Biur2 | Biurakan 2 |
| HD 190918 | HD 191493 | HD 191494 |
| IC 1310 | NGC 6871 | NGC 6883 |
| Ru172 | RY Cygni |
Drawings, descriptions, and CCD photos are copyright Andrew Cooper unless otherwise noted, no usage without permission.
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