Ruchbah
Also known as δ Cas · HR 403
Ruchbah is an eclipsing binary star in the constellation Cassiopeia, about 100 light-years from Earth.
Facts
| Type | Eclipsing binary star (spectral type A5IV) |
|---|---|
| Constellation | Cassiopeia |
| Position (J2000) | 1h 25m 48s, +60° 14′ |
| Distance | 100 light-years (its light set off about 100 years ago) |
| Brightness | magnitude 2.68 (smaller is brighter; the faintest stars the eye sees are about 6) |
| Studied in | 276 scientific papers (SIMBAD) |
When and how to see it
Ruchbah is highest in the sky at midnight in October. From India (about 20° N) it climbs to about 50° above the horizon; from 50° N, to about 80°. 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 Cassiopeia
- Bubble Nebula
- Cassiopeia A
- Heart Nebula
- M52 (NGC 7654)
- M103 (NGC 581)
- Pacman Nebula
- Soul Nebula
- Tycho's Supernova
Everything in Cassiopeia · All 88 constellations · All sky objects
Data: SIMBAD (CDS, Strasbourg; the site's weekly copy) · Data sources & credits