Star · F0I
Arneb
Arneb is a supergiant star of spectral type F0I in the constellation Lepus, 1,939 light-years from the Sun.
| Other names | α Lep · HIP 25985 |
|---|---|
| Constellation | Lepus |
| Distance | 1,939 light-years (594.6 pc) |
| Apparent magnitude | magnitude 2.58 |
| Absolute magnitude | magnitude −6.29 |
| Spectral type | F0I |
| Surface temperature | 8,080 K |
| Luminosity | 29,900 L☉ |
| Radius | 88.3 R☉ |
| Mass | 17.3 M☉ (estimated) |
| Right ascension (J2000) | 5h 32m 43.8s |
| Declination (J2000) | −17° 49′ 20″ |
| Space velocity (relative to the Sun) | 26.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.58). Visible from the whole Southern Hemisphere and north to latitude 72° N. South of latitude 72° S it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 87. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 34 million years.
The Sun seen from there
From a planet around Arneb, the Sun would look like a star of magnitude 13.70, in the direction where our sky has the constellation Hercules. 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.