Aludra
Also known as η CMa · HR 2827
Aludra is a blue supergiant star in the constellation Canis Major, about 1,990 light-years from Earth.
Facts
| Type | Blue supergiant star (spectral type B5Ia) |
|---|---|
| Constellation | Canis Major |
| Position (J2000) | 7h 24m 05s, −29° 18′ |
| Distance | 1,990 light-years (its light set off about 1,990 years ago) |
| Brightness | magnitude 2.45 (smaller is brighter; the faintest stars the eye sees are about 6) |
| Studied in | 379 scientific papers (SIMBAD) |
When and how to see it
Aludra is highest in the sky at midnight in January. From India (about 20° N) it climbs to about 41° above the horizon; from 50° N, to about 11°. To see it you need the naked eye, even from a town.
Heights are worked out for India and for 50° N. Set your location in Settings to see them for where you are.
For tonight's best time from your own town, the darkness and the Moon, open it on the map and see its "Tonight from your location" card.
More in Canis Major
- Adhara
- Canis Major Dwarf Galaxy
- Caroline's Cluster (NGC 2360)
- M41 (NGC 2287)
- Sirius
- Thor's Helmet
- VY Canis Majoris
- Wezen
Everything in Canis Major · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · Data sources & credits