Altair (Star)
R/B-band color composite image from the Second Digitized Sky Survey (DSS2), measuring 30 arcminutes across.
From Cambridge , Altair is visible in the dawn sky, rising at 23:35 (EDT) and reaching an altitude of 53° above the south-eastern horizon before fading from view as dawn breaks at around 05:00.
|
Name
Altair
|
Object type
Star
|
Other names
Position
| Right ascension: | 19h50m46s [3] |
| Declination: | +08°52'02" [3] |
| Constellation: | Aquila |
| Magnitude: | 0.93 (V) [3] 1.25 (BT) [2] 0.95 (VT) [2] |
| Distance: | 5.1 parsec 16.7 lightyrs [5] |
| B-V Color (mag): | 0.27 |
| Proper motion (speed): | 660.3 mas/yr[5] |
| Proper motion (pos ang): | 54.3° |
Derived quantities
| Absolute mag (V): | 2.38 |
Sources