Altair (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 , Altair is visible all night. It will become visible at around 21:04 (EDT), 29° above your eastern horizon, as dusk fades to darkness. It will then reach its highest point in the sky at 00:58, 56° above your southern horizon. It will be lost to dawn twilight at around 04:32, 32° above your western horizon.
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|
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 |
Visibility from Cambridge
All times shown in Cambridge local time.