R Coronae Borealis
Also known as R CrB
R Coronae Borealis is a r crb variable star in the constellation Corona Borealis, about 4,280 light-years from Earth.
Star that fades suddenly behind its own soot
Facts
| Type | R crb variable star (spectral type G0Iep) |
|---|---|
| Constellation | Corona Borealis |
| Position (J2000) | 15h 48m 34s, +28° 09′ |
| Distance | 4,280 light-years (its light set off about 4,280 years ago) |
| Brightness | magnitude 5.71 (smaller is brighter; the faintest stars the eye sees are about 6) |
| Studied in | 800 scientific papers (SIMBAD) |
When and how to see it
R Coronae Borealis is highest in the sky at midnight in May. From India (about 20° N) it climbs to about 82° above the horizon; from 50° N, to about 68°. To see it you need the naked eye from a dark site.
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 Corona Borealis
Everything in Corona Borealis · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · Data sources & credits