Star · M1
Gl 173
Gl 173 is a main-sequence star of spectral type M1 in the constellation Eridanus, 36.6 light-years from the Sun.
| Other names | HIP 21556 |
|---|---|
| Constellation | Eridanus |
| Distance | 36.6 light-years (11.2 pc) |
| Apparent magnitude | magnitude 10.34 |
| Absolute magnitude | magnitude 10.09 |
| Spectral type | M1 |
| Surface temperature | 3,790 K |
| Luminosity | 0.0292 L☉ |
| Radius | 0.397 R☉ |
| Mass | 0.408 M☉ (estimated) |
| Right ascension (J2000) | 4h 37m 41.8s |
| Declination (J2000) | −11° 02′ 19″ |
| Space velocity (relative to the Sun) | 17.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.34. Visible from the whole Southern Hemisphere and north to latitude 79° N. South of latitude 79° S it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1989. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 649 thousand years.
The Sun seen from there
From a planet around Gl 173, the Sun would look like a star of magnitude 5.08, in the direction where our sky has the constellation Hercules. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEPA J050003.05-122343.2 4.16 light-years
- GJ 180 5.66 light-years
- GJ 3306 6.04 light-years
- WISE J045746.08-020719.2 7.52 light-years
- 58 Eri 7.95 light-years
- GJ 3325 8.24 light-years
- GJ 1065 8.64 light-years
- GJ 3332B 8.78 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.