M23 (Open cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 16 arcminutes across.
From Fairfield , M23 is visible in the morning sky, becoming accessible around 01:33, when it reaches an altitude of 20° above your south-eastern horizon. It will then reach its highest point in the sky at 03:59, 29° above your southern horizon. It will be lost to dawn twilight around 04:30, 29° above your southern horizon.
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Name
M23
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Object type
Open cluster
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Position
| Right ascension: | 17h57m [3] |
| Declination: | -18°59' [3] |
| Constellation: | Sagittarius |
| Magnitude: | 5.50 (V) [5] 6.03 (B) [3] |
| Distance: | 628.0 parsec 2047.3 lightyrs [2] |
| B-V Color (mag): | 0.53 |
Derived quantities
| Absolute mag (V): | -3.49 |
Sources