Star · M0
GJ 3138
GJ 3138 is a main-sequence star of spectral type M0 in the constellation Cetus, 92.9 light-years from the Sun. It is orbited by 3 confirmed exoplanet(s).
| Other names | HIP 10037 |
|---|---|
| Constellation | Cetus |
| Distance | 92.9 light-years (28.5 pc) |
| Apparent magnitude | magnitude 10.89 |
| Absolute magnitude | magnitude 8.62 |
| Spectral type | M0 |
| Surface temperature | 3,720 K |
| Luminosity | 0.045 L☉ |
| Radius | 0.5 R☉ |
| Mass | 0.681 M☉ |
| Metallicity [Fe/H] | -0.30 |
| Right ascension (J2000) | 2h 09m 10.9s |
| Declination (J2000) | −16° 20′ 23″ |
| Space velocity (relative to the Sun) | 71.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.89. Visible from the whole Southern Hemisphere and north to latitude 74° N. South of latitude 74° S it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1933. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.6 million years.
The Sun seen from there
From a planet around GJ 3138, the Sun would look like a star of magnitude 7.10, in the direction where our sky has the constellation Boötes. It would be invisible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3133 6.85 light-years
- GJ 3145 7.36 light-years
- SSSPM J0219-1939 7.42 light-years
- HIP 11759 10.1 light-years
- WISEA J022609.16-161000.4 10.3 light-years
- GJ 3127 10.6 light-years
- HIP 11029 11.5 light-years
- 2MASSI J0239424-173547 13.5 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.