Alcor (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From Cambridge , Alcor will become visible at around 20:56 (EDT), 45° above your north-western horizon, as dusk fades to darkness. It will then sink towards the horizon, becoming tricky to observe after 00:46 when it dips 17° above your north-western horizon.
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Name
Alcor
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Object type
Star
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Other names
Position
| Right ascension: | 13h25m13s [2] |
| Declination: | +54°59'16" [2] |
| Constellation: | Ursa Major |
| Magnitude: Variable | 3.99 (V) [2] 4.20 (BT) [2] 4.01 (VT) [2] |
| Distance: | 25.1 parsec 81.7 lightyrs [3] |
| B-V Color (mag): | 0.17 |
| Proper motion (speed): | 121.3 mas/yr[3] |
| Proper motion (pos ang): | 97.6° |
Derived quantities
| Absolute mag (V): | 1.99 |
Sources