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| Messier/type: | M 39 / open cluster |
| mag/dia/dist: | 4.6 / 32' / 880 ly |
| constellation: | Cygnus |
| date/time/place: | Jun17,01 / 00:20 / bangkok |
| trans'y/seeing/l-poll: | good / good / low |
| telescope: | newtonian 4.5", f 8.8 |
| eyepieces/power: | 25mm / 40x |
| sky atlas page: | 9 |
Started from Deneb (white giant star, distant 3,229 ly; the luminosity 60,000 times of sun)
hop to 55, 59 & 63. 59 & 63 will point to M39 which appear in finder scope.
M39 appeared as large open cluster, not condense at the center.
when compare to red-shift 3 program, I found that the most of stars should be
foreground stars due to their distant just approximate 100-200 ly. and also, the
west direction has error 50-60 degree.
I will find out further.
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