M18 (Open cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 10 arcminutes across.
From Cambridge , M18 is visible in the morning sky, becoming accessible around 01:00, when it reaches an altitude of 21° above your south-eastern horizon. It will then reach its highest point in the sky at 03:23, 30° above your southern horizon. It will be lost to dawn twilight around 03:57, 29° above your southern horizon.
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Name
M18
|
Object type
Open cluster
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Position
| Right ascension: | 18h19m [3] |
| Declination: | −17°06' [3] |
| Constellation: | Sagittarius |
| Magnitude: | 6.90 (V) [4] 7.24 (B) [3] |
| Distance: | 1.3 kpc 4.2 klyr [2] |
| B-V Color (mag): | 0.34 |
Derived quantities
| Absolute mag (V): | -3.66 |
Sources