Star · B2V
HIP 39172
HIP 39172 is a main-sequence star of spectral type B2V in the constellation Monoceros, 2,244 light-years from the Sun.
| Constellation | Monoceros |
|---|---|
| Distance | 2,244 light-years (687.9 pc) |
| Apparent magnitude | magnitude 6.41 |
| Absolute magnitude | magnitude −2.78 |
| Spectral type | B2V |
| Surface temperature | 11,360 K |
| Luminosity | 1,900 L☉ |
| Radius | 11.2 R☉ |
| Mass | 7.85 M☉ (estimated) |
| Right ascension (J2000) | 8h 00m 44.1s |
| Declination (J2000) | −2° 52′ 55″ |
| Space velocity (relative to the Sun) | 51.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.41). Visible from the whole Southern Hemisphere and north to latitude 87° N. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 219 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 40 million years.
The Sun seen from there
From a planet around HIP 39172, the Sun would look like a star of magnitude 14.02, in the direction where our sky has the constellation Aquila. 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.