Star · M4
Gl 251
Gl 251 is a main-sequence star of spectral type M4 in the constellation Gemini, 18.8 light-years from the Sun.
| Constellation | Gemini |
|---|---|
| Distance | 18.8 light-years (5.76 pc) |
| Apparent magnitude | magnitude 10.01 |
| Absolute magnitude | magnitude 11.21 |
| Spectral type | M4 |
| Surface temperature | 3,690 K |
| Luminosity | 0.0119 L☉ |
| Radius | 0.267 R☉ |
| Mass | 0.276 M☉ (estimated) |
| Right ascension (J2000) | 6h 54m 48.5s |
| Declination (J2000) | +33° 16′ 15″ |
| Space velocity (relative to the Sun) | 32.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.01. 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 2007. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 333 thousand years.
The Sun seen from there
From a planet around Gl 251, the Sun would look like a star of magnitude 3.63, in the direction where our sky has the constellation Sagittarius. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 251 0.58 light-years
- Gl 268 2.26 light-years
- WISEP J060738.65+242953.4 6.93 light-years
- WISEA J082507.37+280548.2 7.43 light-years
- GJ 1093 8.38 light-years
- Gl 213 8.66 light-years
- GJ 1111 9.01 light-years
- GJ 3454 9.48 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.