Star · B7V
Regulus
Regulus is a main-sequence star of spectral type B7V in the constellation Leo, 79.3 light-years from the Sun.
| Other names | α Leo · HIP 49669 |
|---|---|
| Constellation | Leo |
| Distance | 79.3 light-years (24.3 pc) |
| Apparent magnitude | magnitude 1.36 |
| Absolute magnitude | magnitude −0.57 |
| Spectral type | B7V |
| Surface temperature | 11,360 K |
| Luminosity | 248 L☉ |
| Radius | 4.07 R☉ |
| Mass | 4.39 M☉ (estimated) |
| Right ascension (J2000) | 10h 08m 22.3s |
| Declination (J2000) | +11° 58′ 02″ |
| Space velocity (relative to the Sun) | 28.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 1.36). Visible from the whole Northern Hemisphere and south to latitude 78° S. North of latitude 78° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1947. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around Regulus, the Sun would look like a star of magnitude 6.76, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3576 4.77 light-years
- GJ 3583 8.74 light-years
- GJ 3584 9.01 light-years
- ULAS J095429.90+062309.6 9.07 light-years
- HIP 50782 10.3 light-years
- HIP 51254 11.8 light-years
- GJ 3568 12.1 light-years
- WISEPC J095259.29+195507.3 12.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.