Star · A0I
η Leo
η Leo is a supergiant star of spectral type A0I in the constellation Leo, 1,816 light-years from the Sun.
| Other names | HIP 49583 |
|---|---|
| Constellation | Leo |
| Distance | 1,816 light-years (556.6 pc) |
| Apparent magnitude | magnitude 3.48 |
| Absolute magnitude | magnitude −5.25 |
| Spectral type | A0I |
| Surface temperature | 10,530 K |
| Luminosity | 16,100 L☉ |
| Radius | 38.1 R☉ |
| Mass | 14.5 M☉ (estimated) |
| Right ascension (J2000) | 10h 07m 20.0s |
| Declination (J2000) | +16° 45′ 46″ |
| Space velocity (relative to the Sun) | 3.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.48). Visible from the whole Northern Hemisphere and south to latitude 73° S. North of latitude 73° 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 210. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 32 million years.
The Sun seen from there
From a planet around η Leo, the Sun would look like a star of magnitude 13.56, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.