M40 (Double star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 10 arcminutes across.
From Cambridge , M40 will become visible at around 20:56 (EDT), 38° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, becoming tricky to observe after 23:25 when it dips 21° above your north-western horizon.
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Name
M40
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Object type
Double star
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Position
| Right ascension: | 12h22m [1] |
| Declination: | +58°05' [1] |
| Constellation: | Ursa Major |
| Magnitude: | 9.10 (V) [1] |
| Distance: | 92.0 parsec 299.9 lightyrs [1] |
Derived quantities
| Absolute mag (V): | 4.28 |
Source