Star · M4
GJ 3120
GJ 3120 is a main-sequence star of spectral type M4 in the constellation Aries, 55.2 light-years from the Sun.
| Constellation | Aries |
|---|---|
| Distance | 55.2 light-years (16.9 pc) |
| Apparent magnitude | magnitude 13.90 |
| Absolute magnitude | magnitude 12.76 |
| Spectral type | M4 |
| Surface temperature | 3,820 K |
| Luminosity | 0.00238 L☉ |
| Radius | 0.111 R☉ |
| Mass | 0.137 M☉ (estimated) |
| Right ascension (J2000) | 1h 51m 23.5s |
| Declination (J2000) | +21° 23′ 39″ |
| Space velocity (relative to the Sun) | 27.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.90. Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° N 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 1971. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 979 thousand years.
The Sun seen from there
From a planet around GJ 3120, the Sun would look like a star of magnitude 5.97, in the direction where our sky has the constellation Virgo. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.