M39 (Open cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 19 arcminutes across.
From Cambridge , M39 is visible in the dawn sky, becoming accessible around 00:24 (EDT), when it reaches an altitude of 19° above your north-eastern horizon. It will then reach an altitude of 54° before fading from view as dawn breaks at 04:26.
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Name
M39
|
Object type
Open cluster
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Position
| Right ascension: | 21h31m [3] |
| Declination: | +48°26' [3] |
| Constellation: | Cygnus |
| Magnitude: | 4.60 (V) [5] 4.66 (B) [3] |
| Distance: | 326.0 parsec 1062.8 lightyrs [2] |
| B-V Color (mag): | 0.06 |
Derived quantities
| Absolute mag (V): | -2.97 |
Sources