Rasalgethi
Also known as α¹ Her · HR 6406
Rasalgethi is a long-period variable star in the constellation Hercules.
Facts
| Type | Long-period variable star (spectral type M5Ib-II) |
|---|---|
| Constellation | Hercules |
| Position (J2000) | 17h 14m 38s, +14° 23′ |
| Brightness | magnitude 3.33 (smaller is brighter; the faintest stars the eye sees are about 6) |
| Studied in | 448 scientific papers (SIMBAD) |
When and how to see it
Rasalgethi is highest in the sky at midnight in June. From India (about 20° N) it climbs to about 84° above the horizon; from 50° N, to about 54°. 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 Hercules
- Great Hercules Cluster (M13)
- Hercules A
- Hercules Cluster
- Hercules X-1
- Kornephoros
- M92 (NGC 6341)
- Markarian 501
- Sarin
Everything in Hercules · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · Data sources & credits