Star · B9
HIP 51561
HIP 51561 is a main-sequence star of spectral type B9 in the constellation Vela, 822.4 light-years from the Sun.
| Constellation | Vela |
|---|---|
| Distance | 822.4 light-years (252.2 pc) |
| Apparent magnitude | magnitude 5.76 |
| Absolute magnitude | magnitude −1.25 |
| Spectral type | B9 |
| Surface temperature | 13,440 K |
| Luminosity | 652 L☉ |
| Radius | 4.71 R☉ |
| Mass | 5.79 M☉ (estimated) |
| Right ascension (J2000) | 10h 31m 57.4s |
| Declination (J2000) | −45° 04′ 00″ |
| Space velocity (relative to the Sun) | 17.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.76). Visible from the whole Southern Hemisphere and north to latitude 45° N. South of latitude 45° S 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 1204. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 15 million years.
The Sun seen from there
From a planet around HIP 51561, the Sun would look like a star of magnitude 11.84, in the direction where our sky has the constellation Lacerta. 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.