Star · K0V
Gl 638.1
Gl 638.1 is a main-sequence star of spectral type K0V in the constellation Ara, 215.9 light-years from the Sun.
| Other names | HIP 82302 |
|---|---|
| Constellation | Ara |
| Distance | 215.9 light-years (66.2 pc) |
| Apparent magnitude | magnitude 7.38 |
| Absolute magnitude | magnitude 3.28 |
| Spectral type | K0V |
| Surface temperature | 4,990 K |
| Luminosity | 5.77 L☉ |
| Radius | 3.21 R☉ |
| Mass | 1.55 M☉ (estimated) |
| Right ascension (J2000) | 16h 48m 59.4s |
| Declination (J2000) | −47° 43′ 08″ |
| Space velocity (relative to the Sun) | 44.1 km/s |
In the sky
Too faint for the naked eye (magnitude 7.38); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 42° N. South of latitude 42° 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 1810. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.8 million years.
The Sun seen from there
From a planet around Gl 638.1, the Sun would look like a star of magnitude 8.93, in the direction where our sky has the constellation Perseus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 82431 6.47 light-years
- HIP 82613 13.2 light-years
- HIP 83001 14.3 light-years
- HIP 81533 15.9 light-years
- HIP 83970 19.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.