Star · K0V
GJ 9638
GJ 9638 is a main-sequence star of spectral type K0V in the constellation Hercules, 69.6 light-years from the Sun.
| Other names | HIP 92919 |
|---|---|
| Constellation | Hercules |
| Distance | 69.6 light-years (21.3 pc) |
| Apparent magnitude | magnitude 8.16 |
| Absolute magnitude | magnitude 6.52 |
| Spectral type | K0V |
| Surface temperature | 4,970 K |
| Luminosity | 0.295 L☉ |
| Radius | 0.733 R☉ |
| Mass | 0.737 M☉ (estimated) |
| Right ascension (J2000) | 18h 55m 53.2s |
| Declination (J2000) | +23° 33′ 24″ |
| Space velocity (relative to the Sun) | 31.8 km/s |
In the sky
Too faint for the naked eye (magnitude 8.16); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 66° S. North of latitude 66° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1956. 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 9638, the Sun would look like a star of magnitude 6.47, in the direction where our sky has the constellation Canis Major. 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.