Star · K
ο Oph
ο Oph is a supergiant star of spectral type K in the constellation Ophiuchus, 287.1 light-years from the Sun.
| Other names | HIP 84626 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 287.1 light-years (88.0 pc) |
| Apparent magnitude | magnitude 5.14 |
| Absolute magnitude | magnitude 0.42 |
| Spectral type | K |
| Surface temperature | 4,630 K |
| Luminosity | 97.3 L☉ |
| Radius | 15.3 R☉ |
| Mass | 3.36 M☉ (estimated) |
| Right ascension (J2000) | 17h 18m 00.7s |
| Declination (J2000) | −24° 17′ 13″ |
| Space velocity (relative to the Sun) | 38.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.14). Visible from the whole Southern Hemisphere and north to latitude 66° N. South of latitude 66° 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 1739. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.1 million years.
The Sun seen from there
From a planet around ο Oph, the Sun would look like a star of magnitude 9.55, 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):
- ο Oph 6.95 light-years
- HIP 84416 10.4 light-years
- HIP 84135 14.3 light-years
- HIP 84314 14.4 light-years
- HIP 85882 17.7 light-years
- HIP 84198 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.