Star · M2II
HIP 39487
HIP 39487 is a bright giant star of spectral type M2II in the constellation Puppis, 4,014 light-years from the Sun.
| Constellation | Puppis |
|---|---|
| Distance | 4,014 light-years (1,231 pc) |
| Apparent magnitude | magnitude 5.25 |
| Absolute magnitude | magnitude −5.20 |
| Spectral type | M2II |
| Surface temperature | 3,300 K |
| Luminosity | 86,900 L☉ |
| Radius | 904 R☉ |
| Mass | 2.72 M☉ (estimated) |
| Right ascension (J2000) | 8h 04m 16.2s |
| Declination (J2000) | −32° 40′ 29″ |
| Space velocity (relative to the Sun) | 63.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.25). Visible from the whole Southern Hemisphere and north to latitude 57° N. South of latitude 57° S it never sets. 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 4,014 years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 71 million years.
The Sun seen from there
From a planet around HIP 39487, the Sun would look like a star of magnitude 15.28, in the direction where our sky has the constellation Cygnus. 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.