Star · K3V
Gl 173.1A
Gl 173.1A is a main-sequence star of spectral type K3V in the constellation Taurus, 98.8 light-years from the Sun.
| Other names | HIP 21710 |
|---|---|
| Constellation | Taurus |
| Distance | 98.8 light-years (30.3 pc) |
| Apparent magnitude | magnitude 9.19 |
| Absolute magnitude | magnitude 6.78 |
| Spectral type | K3V |
| Surface temperature | 4,700 K |
| Luminosity | 0.266 L☉ |
| Radius | 0.778 R☉ |
| Mass | 0.718 M☉ (estimated) |
| Right ascension (J2000) | 4h 39m 42.6s |
| Declination (J2000) | +9° 52′ 19″ |
| Space velocity (relative to the Sun) | 59.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.19. Visible from the whole Northern Hemisphere and south to latitude 80° S. 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 1927. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around Gl 173.1A, the Sun would look like a star of magnitude 7.24, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 173.1B 2.60 light-years
- CWISE J042731.38+074344.9 8.57 light-years
- GJ 3291 9.61 light-years
- CFHT-Hy-20 10.1 light-years
- GJ 9158 11.6 light-years
- CWISE J050626.96+073842.4 12.5 light-years
- HIP 23431 12.7 light-years
- GJ 3282A 13.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.