White main-sequence star · Cassiopeia

Ruchbah

Also known as: δ Cassiopeiae (δ Cas), HIP 6686

mag 2.799 light-years

About

Ruchbah (δ Cassiopeiae) is a white main-sequence star of magnitude 2.7 in Cassiopeia, about 99 light-years away.

Ruchbah is in the constellation Cassiopeia.
Best evenings: around late November it is highest at about 9 pm (10 pm in summer time); a month earlier, two hours later.
Where on Earth: it is seen well, at least 10° up, from north of 20° S.
Star patterns: Cassiopeia’s W.

When it rises and sets tonight, how high it climbs and how much the Moon gets in the way are worked out in your browser for your place.

EyesEasy, even from town.
Binoculars (10×50)A sharp point; binoculars bring out its colour and the fainter stars around it.
Telescope (6–8 inch)Still a point of light at any magnification — stars are too far away to show a disc. Low in the sky, bright stars twinkle and flash colours.

Stars look the same in any instrument: brighter and sharper, but never bigger.

Proper name	Ruchbah
Designation	δ Cassiopeiae (δ Cas)
Hipparcos number	HIP 6686
Type	White main-sequence star
Spectral type	A5Vv SB
Colour	Yellowish whiteB−V colour index 0.16
Magnitude	2.7The smaller the number, the brighter.
Distance	99 light-yearsThe light you see left it around 1927.
Proper motion	0.30″ per year across the sky
Constellation	Cassiopeia
Right ascension (J2000)	01h 25m 48.8s
Declination (J2000)	+60° 14′ 07″