Star · M3
GJ 9238
GJ 9238 is a main-sequence star of spectral type M3 in the constellation Gemini, 129.8 light-years from the Sun.
| Constellation | Gemini |
|---|---|
| Distance | 129.8 light-years (39.8 pc) |
| Apparent magnitude | magnitude 13.85 |
| Absolute magnitude | magnitude 10.85 |
| Spectral type | M3 |
| Surface temperature | 3,840 K |
| Luminosity | 0.0135 L☉ |
| Radius | 0.263 R☉ |
| Mass | 0.292 M☉ (estimated) |
| Right ascension (J2000) | 7h 37m 57.0s |
| Declination (J2000) | +28° 16′ 49″ |
| Space velocity (relative to the Sun) | 88.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.85. Visible from the whole Northern Hemisphere and south to latitude 62° S. North of latitude 62° 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 1896. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around GJ 9238, the Sun would look like a star of magnitude 7.83, in the direction where our sky has the constellation Sagittarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 36874 7.97 light-years
- ι Gem 8.75 light-years
- σ Gem 9.92 light-years
- ULAS J074720.07+245516.3 9.93 light-years
- 2MASSI J0753321+291711 10.8 light-years
- HIP 38172 11.1 light-years
- GJ 3458B 13.1 light-years
- 2MASSW J0708213+295035 15.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.