Star · K6V
GJ 3100
GJ 3100 is a main-sequence star of spectral type K6V in the constellation Andromeda, 149.2 light-years from the Sun.
| Other names | HIP 7420 |
|---|---|
| Constellation | Andromeda |
| Distance | 149.2 light-years (45.7 pc) |
| Apparent magnitude | magnitude 10.97 |
| Absolute magnitude | magnitude 7.67 |
| Spectral type | K6V |
| Surface temperature | 4,150 K |
| Luminosity | 0.179 L☉ |
| Radius | 0.818 R☉ |
| Mass | 0.65 M☉ (estimated) |
| Right ascension (J2000) | 1h 35m 37.6s |
| Declination (J2000) | +42° 02′ 20″ |
| Space velocity (relative to the Sun) | 66.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.97. Visible from the whole Northern Hemisphere and south to latitude 48° S. North of latitude 48° 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 1877. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.6 million years.
The Sun seen from there
From a planet around GJ 3100, the Sun would look like a star of magnitude 8.13, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 6943 8.62 light-years
- GJ 3080 11.1 light-years
- HIP 6711 11.5 light-years
- HIP 9151 11.5 light-years
- HIP 9059 12.1 light-years
- GJ 3089 12.4 light-years
- GJ 3086A 13.2 light-years
- SIMP J01512665+3824122 15.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.