Star · M
GJ 3102
GJ 3102 is a main-sequence star of spectral type M in the constellation Phoenix, 72.3 light-years from the Sun.
| Other names | HIP 7554 |
|---|---|
| Constellation | Phoenix |
| Distance | 72.3 light-years (22.2 pc) |
| Apparent magnitude | magnitude 10.39 |
| Absolute magnitude | magnitude 8.66 |
| Spectral type | M |
| Surface temperature | 3,920 K |
| Luminosity | 0.0916 L☉ |
| Radius | 0.655 R☉ |
| Mass | 0.55 M☉ (estimated) |
| Right ascension (J2000) | 1h 37m 20.8s |
| Declination (J2000) | −49° 11′ 44″ |
| Space velocity (relative to the Sun) | 54.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.39. Visible from the whole Southern Hemisphere and north to latitude 41° N. South of latitude 41° 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 1954. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around GJ 3102, the Sun would look like a star of magnitude 6.56, in the direction where our sky has the constellation Ursa Major. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3090 4.67 light-years
- CWISE J011931.78-493750.4 7.12 light-years
- CWISE J015042.24-462155.3 7.64 light-years
- GJ 3059 10.6 light-years
- WISEA J020047.29-510521.4 10.8 light-years
- CWISE J011558.74-461620.8 11.1 light-years
- WISEA J020110.68-523916.9 11.5 light-years
- 2MASS J01282664-5545343 14.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.