Star · G
Gl 639.2
Gl 639.2 is a main-sequence star of spectral type G in the constellation Triangulum Australe, 260.7 light-years from the Sun.
| Other names | HIP 82502 |
|---|---|
| Constellation | Triangulum Australe |
| Distance | 260.7 light-years (79.9 pc) |
| Apparent magnitude | magnitude 10.91 |
| Absolute magnitude | magnitude 6.40 |
| Spectral type | G |
| Surface temperature | 5,540 K |
| Luminosity | 0.27 L☉ |
| Radius | 0.563 R☉ |
| Mass | 0.721 M☉ (estimated) |
| Right ascension (J2000) | 16h 51m 42.6s |
| Declination (J2000) | −64° 26′ 25″ |
| Space velocity (relative to the Sun) | 373.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.91. Visible from the whole Southern Hemisphere and north to latitude 26° N. South of latitude 26° 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 1765. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.6 million years.
The Sun seen from there
From a planet around Gl 639.2, the Sun would look like a star of magnitude 9.34, in the direction where our sky has the constellation Camelopardalis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 81273 16.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.