NGC6939 (Open cluster)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 12 arcminutes across.
From South El Monte , NGC6939 will become visible at around 17:46 (PST), 54° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, becoming tricky to observe after 22:20 when it dips 21° above your north-western horizon.
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Name
NGC6939
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Object type
Open cluster
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Position
| Right ascension: | 20h31m [2] |
| Declination: | +60°39' [2] |
| Constellation: | Cepheus |
| Magnitude: | 7.80 (V) [4] 8.85 (B) [2] |
| Distance: | 1.8 kpc 5.9 klyr [1] |
| B-V Color (mag): | 1.05 |
Derived quantities
| Absolute mag (V): | -3.48 |
Sources