distance from Earth | 79.02 ly apparent magnitude | +1.36 (easily visible to the naked eye) absolute magnitude | -0.519 (visual) spectral class | B8IVn (subgiant | spin-induced broad absorption) effective temperature | 11700 K mass | 7.6×10^30 kg 3.8 M_☉ main sequence lifetime | 260 million yr end state | carbon-oxygen white dwarf Bayer name | α Leonis (Alpha Leonis)

right ascension | 10^h 8^m 22.311^s declination | 11° 58' 1.95"

Alphard | Pollux | Procyon | Castor | Jupiter | Dubhe | Alhena | Spica | Alioth | Sirius | ...

α Leonis C | α Leonis B | GJ 3598 | GJ 3576 | GJ 3584 | GJ 2077 | HD 89813 | HD 90663 | GJ 3583 | GJ 3619

| Regulus | α Leonis B | α Leonis C component | A | B | C mass | 7.6×10^30 kg≈3.8 M_☉ | 1.6×10^30 kg≈0.8 M_☉ | 6×10^29 kg≈0.3 M_☉ color | | | apparent magnitude | +1.36 | +8.14 | +11.3

(not currently visible)

altitude | -37° 42' 1.9" (below horizon) azimuth | 343° 50' 30" (NNW) next rise | 2:35 pm EDT | Tuesday, April 21, 2026 constellation | Leo

21^h 16^m 21.55^s

Regulus is the brightest object in the constellation Leo and one of the brightest stars in the night sky. It has the Bayer designation designated α Leonis, which is Latinized to Alpha Leonis, and abbreviated Alpha Leo or α Leo. Regulus appears single, but is actually a quadruple star system composed of four stars that are organized into two pairs. The system lies approximately 79 light years from the Solar System.