Star · K
GJ 3103
GJ 3103 is a main-sequence star of spectral type K in the constellation Cetus, 67.6 light-years from the Sun.
| Other names | HIP 7646 |
|---|---|
| Constellation | Cetus |
| Distance | 67.6 light-years (20.7 pc) |
| Apparent magnitude | magnitude 11.60 |
| Absolute magnitude | magnitude 10.02 |
| Spectral type | K |
| Surface temperature | 3,800 K |
| Luminosity | 0.0308 L☉ |
| Radius | 0.405 R☉ |
| Mass | 0.419 M☉ (estimated) |
| Right ascension (J2000) | 1h 38m 29.6s |
| Declination (J2000) | +0° 39′ 04″ |
| Space velocity (relative to the Sun) | 53.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.60. Visible from the whole Northern Hemisphere and south to latitude 89° S. 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 1958. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
The Sun seen from there
From a planet around GJ 3103, the Sun would look like a star of magnitude 6.41, 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):
- CFBDS J013302.27+023128.4 6.84 light-years
- WISEPC J013836.59-032221.2 8.36 light-years
- GJ 3132 10.9 light-years
- TOI-4527 11.6 light-years
- WISEA J014535.23-031412.9 11.9 light-years
- GJ 1027 12.5 light-years
- GJ 1041B 12.6 light-years
- GJ 1041A 12.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.