Star · M4
GJ 1251
GJ 1251 is a main-sequence star of spectral type M4 in the constellation Octans, 42.0 light-years from the Sun.
| Constellation | Octans |
|---|---|
| Distance | 42.0 light-years (12.9 pc) |
| Apparent magnitude | magnitude 13.82 |
| Absolute magnitude | magnitude 13.27 |
| Spectral type | M4 |
| Surface temperature | 3,460 K |
| Luminosity | 0.00257 L☉ |
| Radius | 0.141 R☉ |
| Mass | 0.142 M☉ (estimated) |
| Right ascension (J2000) | 20h 28m 01.9s |
| Declination (J2000) | −76° 41′ 17″ |
| Space velocity (relative to the Sun) | 150.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.82. Visible from the whole Southern Hemisphere and north to latitude 13° N. South of latitude 13° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1984. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 745 thousand years.
The Sun seen from there
From a planet around GJ 1251, the Sun would look like a star of magnitude 5.38, in the direction where our sky has the constellation Camelopardalis. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEPA J201824.96-742325.9 3.25 light-years
- LHS 475 4.90 light-years
- GJ 4004 6.79 light-years
- WISE J173551.72-820900.1 6.94 light-years
- WISEA J221216.27-693121.6 7.52 light-years
- GJ 4154 7.95 light-years
- Gl 774B 8.21 light-years
- Gl 774A 8.22 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.