Star · M8
HIP 21479
HIP 21479 is a supergiant star of spectral type M8 in the constellation Dorado, 178.1 light-years from the Sun.
| Constellation | Dorado |
|---|---|
| Distance | 178.1 light-years (54.6 pc) |
| Apparent magnitude | magnitude 5.59 |
| Absolute magnitude | magnitude 1.90 |
| Spectral type | M8 |
| Surface temperature | 3,790 K |
| Luminosity | 54.5 L☉ |
| Radius | 17.1 R☉ |
| Mass | 2.85 M☉ (estimated) |
| Right ascension (J2000) | 4h 36m 45.6s |
| Declination (J2000) | −62° 04′ 38″ |
| Space velocity (relative to the Sun) | 37.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.59). Visible from the whole Southern Hemisphere and north to latitude 28° N. South of latitude 28° S it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1848. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.2 million years.
The Sun seen from there
From a planet around HIP 21479, the Sun would look like a star of magnitude 8.52, in the direction where our sky has the constellation Draco. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 21889 3.53 light-years
- HIP 21286 11.4 light-years
- WISEA J050259.73-610206.1 11.4 light-years
- HD 30177 13.2 light-years
- HIP 21609 17.1 light-years
- HD 25171 17.7 light-years
- HIP 19327 18.5 light-years
- HIP 17970 18.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.