Star · M
Gl 637
Gl 637 is a main-sequence star of spectral type M in the constellation Apus, 51.4 light-years from the Sun.
| Other names | HIP 82256 |
|---|---|
| Constellation | Apus |
| Distance | 51.4 light-years (15.8 pc) |
| Apparent magnitude | magnitude 11.36 |
| Absolute magnitude | magnitude 10.37 |
| Spectral type | M |
| Surface temperature | 3,650 K |
| Luminosity | 0.0274 L☉ |
| Radius | 0.414 R☉ |
| Mass | 0.397 M☉ (estimated) |
| Right ascension (J2000) | 16h 48m 24.4s |
| Declination (J2000) | −72° 58′ 34″ |
| Space velocity (relative to the Sun) | 56.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.36. Visible from the whole Southern Hemisphere and north to latitude 17° N. South of latitude 17° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1975. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 912 thousand years.
The Sun seen from there
From a planet around Gl 637, the Sun would look like a star of magnitude 5.82, in the direction where our sky has the constellation Camelopardalis. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3943 6.33 light-years
- 2MASS J17534518-6559559 8.03 light-years
- GJ 1218 10.5 light-years
- WISE J173551.72-820900.1 11.4 light-years
- GJ 4004 11.6 light-years
- 2MASS J13550323-8258375 12.3 light-years
- Gl 656 12.3 light-years
- ζ TrA 12.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.