Star · M2
Gl 31.2A
Gl 31.2A is a main-sequence star of spectral type M2 in the constellation Cetus, 118.7 light-years from the Sun.
| Other names | HIP 3493 |
|---|---|
| Constellation | Cetus |
| Distance | 118.7 light-years (36.4 pc) |
| Apparent magnitude | magnitude 10.74 |
| Absolute magnitude | magnitude 7.93 |
| Spectral type | M2 |
| Surface temperature | 3,940 K |
| Luminosity | 0.176 L☉ |
| Radius | 0.899 R☉ |
| Mass | 0.647 M☉ (estimated) |
| Right ascension (J2000) | 0h 44m 37.1s |
| Declination (J2000) | −18° 56′ 48″ |
| Space velocity (relative to the Sun) | 58.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.74. Visible from the whole Southern Hemisphere and north to latitude 71° N. South of latitude 71° S it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1907. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.1 million years.
The Sun seen from there
From a planet around Gl 31.2A, the Sun would look like a star of magnitude 7.64, in the direction where our sky has the constellation Coma Berenices. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 31.2B 1.43 light-years
- Felixvarela 11.3 light-years
- 2MASS J00285545-1927165 11.5 light-years
- 2MASSW J0051107-154417 11.6 light-years
- HIP 3249 13.2 light-years
- WISEA J010631.20-231415.1 13.8 light-years
- WISEA J002050.25-151913.1 14.2 light-years
- GJ 3026 14.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.