α-Lac (Star)
Color-magnitude diagram
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
Finder chart
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From Cambridge , α-Lac is visible in the dawn sky, becoming accessible around 04:01 (EDT), when it reaches an altitude of 17° above your north-eastern horizon. It will then reach an altitude of 31° before fading from view as dawn breaks at 05:51.
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|
Name
α-Lac
|
Object type
Star
|
Other names
Position
| Right ascension: | 22h31m17s [6] |
| Declination: | +50°16'57" [6] |
| Constellation: | Lacerta |
| Magnitude: | 3.78 (V) [3] 3.81 (BT) [2] 3.78 (VT) [2] 3.78 (G) [6] 3.77 (BP) [6] 3.72 (RP) [6] |
| Distance: | 31.8 parsec 103.5 lightyrs [6] |
| B-V Color (mag): | 0.03 |
| Proper motion (speed): | 138.4 mas/yr[6] |
| Proper motion (pos ang): | 82.7° |
Derived quantities
| Absolute mag (V): | 1.27 |
Visibility from Cambridge
All times shown in Cambridge local time.