| Messier/type: | M57 / planetary nebula |
| mag/dia/dist: | 8.8 / 76" / 1,140 ly |
| constellation: | Lyra |
| date/time/place: | Feb 24, 01 / 05:30 / bangkok |
| trans'y/seeing/l-poll: | fair / fair / medium |
| telescope: | newtonian 4.5" f8.8 |
| eyepieces/power: | 25mm / 40x |
| sky atlas page: | 8 |
start at Vega, hop to stars 10 & 14. M57 locates between stars 10 & 14, slightly closer to star 10. Stars 10 & 14 are same magnitude and easily to get confuse, two stars mag5 close to star 14 will help to identify. At eyepiece 40x, M57 appeared as small, elongted, faint, couldn't observed like a ring, have to wait for moment of good seeing and use avert vision. It is my first planetary nebula.
Refer to text: Bright, large, irregular ring structure, blue center star mag15.2, expansion 30km/sec. Home