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| Messier/type: | M 18 / open cluster |
| mag/dia/dist: | 6.9 / 5' / 4,000 ly |
| constellation: | Sagittarius |
| date/time/place: | Apr21,01 / 01:30 / bangkok |
| trans'y/seeing/l-poll: | good / fair / medium |
| telescope: | newtonian 4.5", f 8.8 |
| eyepieces/power: | 25mm / 40x |
| sky atlas page: | 22 |
start hopping from the tea pot lid star 22 'Kaus Borealis', hop to a star mag5
near B91 (B..series are dark nebulae, I don't expect to see any dark nebula at Bangkok)
,then hop to stars 13,14,15 & 16, this group of stars point to a star mag5.5 which close to
M18, not so hard to lock it to the center of FOV of finder scope
,goto eyepiece at 40x M18 appeared as a small open cluster. from text book, it can be
seen as black swan, but I can seen only body & wing without neck & head which are
fainter stars.
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