M39 (Open cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 19 arcminutes across.
Finder chart
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From Cambridge , M39 will become visible at around 17:27 (EST), 83° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, becoming tricky to observe after 00:34 when it dips 19° above your north-western horizon.
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|
Name
M39
|
Object type
Open cluster
|
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
Visibility from Cambridge
All times shown in Cambridge local time.