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| Messier/type: | M25 / open cluster |
| mag/dia/dist: | 4.6 / 30' / 2,300 ly |
| constellation: | Sagittarius |
| date/time/place: | Apr 21, 01 / 01:00-05:00 / bangkok |
| trans'y/seeing/l-poll: | good / good / medium |
| telescope: | newtonian 4.5" f8.8 |
| eyepieces/power: | 25mm / 40x |
| sky atlas page: | 22 |
Start from the tea-pot's handle: stars 34,27,38 & 40 (quite fit in FOV of finder scope)
stars 40-->27--> points to star 22 "the lid of tea pot" or "Kaus Borealis".
From star 22 hop to star mag5 which close to M8,M20 & M21; then hop to stars 13 & 21.
Stars 13-->21-->points to M25 (not in quite straight line).
M25 appeared as large, loose cluster with faint nebulosity that should be non-resolvable stars.
Refer to text: 30 stars detached, max mag6.7, extends 18 ly, age 89 milloin years.
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