Star · K
GJ 9397
GJ 9397 is a main-sequence star of spectral type K in the constellation Coma Berenices, 97.8 light-years from the Sun.
| Other names | HIP 59602 |
|---|---|
| Constellation | Coma Berenices |
| Distance | 97.8 light-years (30.0 pc) |
| Apparent magnitude | magnitude 11.91 |
| Absolute magnitude | magnitude 9.53 |
| Spectral type | K |
| Surface temperature | 4,500 K |
| Luminosity | 0.0241 L☉ |
| Radius | 0.255 R☉ |
| Mass | 0.375 M☉ (estimated) |
| Right ascension (J2000) | 12h 13m 20.8s |
| Declination (J2000) | +16° 41′ 44″ |
| Space velocity (relative to the Sun) | 97.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.91. Visible from the whole Northern Hemisphere and south to latitude 73° S. North of latitude 73° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1928. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
The Sun seen from there
From a planet around GJ 9397, the Sun would look like a star of magnitude 7.21, in the direction where our sky has the constellation Cetus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 60074 8.52 light-years
- HIP 57949 10.2 light-years
- HIP 58314 11.0 light-years
- HIP 57866 13.6 light-years
- 2MASSW J1155009+230706 13.8 light-years
- GJ 3715 13.9 light-years
- ULAS J120257.05+090158.8 14.4 light-years
- HD 110067 14.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.