Star · M3.0 V
GJ 251
GJ 251 is a main-sequence star of spectral type M3.0 V in the constellation Gemini, 18.2 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | HIP 33226 |
|---|---|
| Constellation | Gemini |
| Distance | 18.2 light-years (5.58 pc) |
| Apparent magnitude | magnitude 9.89 |
| Absolute magnitude | magnitude 11.16 |
| Spectral type | M3.0 V |
| Surface temperature | 3,340 K |
| Luminosity | 0.0155 L☉ |
| Radius | 0.36 R☉ |
| Mass | 0.35 M☉ |
| Age | 6.8 billion years |
| Metallicity [Fe/H] | 0.07 |
| Right ascension (J2000) | 6h 54m 48.9s |
| Declination (J2000) | +33° 16′ 05″ |
| Space velocity (relative to the Sun) | 31.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.89. Visible from the whole Northern Hemisphere and south to latitude 57° S. North of latitude 57° N 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 around the year 2008. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 323 thousand years.
The Sun seen from there
From a planet around GJ 251, the Sun would look like a star of magnitude 3.56, in the direction where our sky has the constellation Sagittarius. It would be visible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 251 0.58 light-years
- Gl 268 2.53 light-years
- WISEP J060738.65+242953.4 7.29 light-years
- WISEA J082507.37+280548.2 7.55 light-years
- GJ 1111 8.51 light-years
- Gl 213 8.56 light-years
- GJ 1093 8.79 light-years
- GJ 1116B 9.31 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.