M39 (Open cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 19 arcminutes across.
From South El Monte , M39 is visible in both the dusk and dawn skies. In the evening, it will become visible at around 18:29 (PST), 21° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, setting 4 hours and 5 minutes after the Sun at 21:33 (PST). In the morning, it will rise at 02:43 – 3 hours and 58 minutes before the Sun – and reach an altitude of 20° above the north-eastern horizon before fading from view as dawn breaks at around 05:40.
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Name
M39
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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] |
| Angular dimensions: | 19.5 arcmin |
| Distance: | 326.0 parsec 1062.8 lightyrs [2] |
| B-V Color (mag): | 0.06 |
Derived quantities
| Absolute mag (V): | -2.97 |
Sources