Star · K2V
12 Oph
12 Oph is a main-sequence star of spectral type K2V in the constellation Ophiuchus, 32.3 light-years from the Sun.
| Other names | Gl 631 · HIP 81300 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 32.3 light-years (9.89 pc) |
| Apparent magnitude | magnitude 5.77 |
| Absolute magnitude | magnitude 5.79 |
| Spectral type | K2V |
| Surface temperature | 5,200 K |
| Luminosity | 0.523 L☉ |
| Radius | 0.89 R☉ |
| Mass | 0.85 M☉ (estimated) |
| Right ascension (J2000) | 16h 36m 21.4s |
| Declination (J2000) | −2° 19′ 28″ |
| Space velocity (relative to the Sun) | 29.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.77). Visible from the whole Southern Hemisphere and north to latitude 88° 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 1994. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 572 thousand years.
The Sun seen from there
From a planet around 12 Oph, the Sun would look like a star of magnitude 4.81, in the direction where our sky has the constellation Taurus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- SDSSp J162414.37+002915.6 4.06 light-years
- Gl 653 4.81 light-years
- Gl 654 4.84 light-years
- GJ 1207 4.87 light-years
- GJ 3967 4.89 light-years
- Gl 660A 5.16 light-years
- Gl 660B 6.00 light-years
- 2MASSW J1645221-131951 8.11 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.