Regulus

Right
ascension
Declination
Apparent
magnitude
Spectral
type
Distance
(l.y.)
Absolute
magnitude
10h 08.4m
+11° 58’
+1.36
B7V
77.5
–0.52

The star Alpha Leonis, magnitude 1.36, the faintest of the first-magnitude stars. It is a B7 (i.e. blue-white) dwarf 77 light years away and has a wide companion of magnitude 7.7.

Adapted from the entry by Ian Ridpath in the Oxford Dictionary of Astronomy.
© OUP


Below: Regulus in Leo, from Norton’s Star Atlas, 20th edition.
© Pearson Education and Charles Nix
Leo.gif