Star · G0
Gl 634.1
Gl 634.1 is a main-sequence star of spectral type G0 in the constellation Ophiuchus, 99.1 light-years from the Sun.
| Other names | HIP 81681 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 99.1 light-years (30.4 pc) |
| Apparent magnitude | magnitude 7.21 |
| Absolute magnitude | magnitude 4.80 |
| Spectral type | G0 |
| Surface temperature | 5,850 K |
| Luminosity | 1.1 L☉ |
| Radius | 1.02 R☉ |
| Mass | 1.03 M☉ (estimated) |
| Right ascension (J2000) | 16h 41m 08.2s |
| Declination (J2000) | −2° 51′ 26″ |
| Space velocity (relative to the Sun) | 75.7 km/s |
In the sky
Too faint for the naked eye (magnitude 7.21); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 87° N. It stands highest at midnight in May, 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 634.1, the Sun would look like a star of magnitude 7.24, in the direction where our sky has the constellation Taurus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 82169 3.92 light-years
- WISE J163645.56-074325.1 8.65 light-years
- Gl 618.1 9.71 light-years
- GJ 3969 9.77 light-years
- SDSS J163359.23-064056.5 10.4 light-years
- HIP 80597 10.5 light-years
- GJ 3957 11.3 light-years
- HIP 83676 12.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.