Star · M4
Gl 170
Gl 170 is a main-sequence star of spectral type M4 in the constellation Perseus, 35.5 light-years from the Sun.
| Constellation | Perseus |
|---|---|
| Distance | 35.5 light-years (10.9 pc) |
| Apparent magnitude | magnitude 13.91 |
| Absolute magnitude | magnitude 13.73 |
| Spectral type | M4 |
| Surface temperature | 3,480 K |
| Luminosity | 0.00165 L☉ |
| Radius | 0.112 R☉ |
| Mass | 0.117 M☉ (estimated) |
| Right ascension (J2000) | 4h 30m 24.5s |
| Declination (J2000) | +39° 51′ 04″ |
| Space velocity (relative to the Sun) | 32.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.91. Visible from the whole Northern Hemisphere and south to latitude 50° S. North of latitude 50° N 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 1990. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 630 thousand years.
The Sun seen from there
From a planet around Gl 170, the Sun would look like a star of magnitude 5.01, in the direction where our sky has the constellation Scorpius. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISE J043052.92+463331.6 4.36 light-years
- GJ 3304 7.54 light-years
- WISE J033515.01+431045.1 7.57 light-years
- λ Aur 8.27 light-years
- Gl 172 8.36 light-years
- GJ 1073 9.03 light-years
- WISE J040137.21+284951.7 9.70 light-years
- Gl 194B 9.72 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.