Star · K0III
ψ Oph
ψ Oph is a giant star of spectral type K0III in the constellation Ophiuchus, 193.9 light-years from the Sun.
| Other names | HIP 80343 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 193.9 light-years (59.5 pc) |
| Apparent magnitude | magnitude 4.48 |
| Absolute magnitude | magnitude 0.61 |
| Spectral type | K0III |
| Surface temperature | 4,750 K |
| Luminosity | 76 L☉ |
| Radius | 12.9 R☉ |
| Mass | 3.13 M☉ (estimated) |
| Right ascension (J2000) | 16h 24m 06.2s |
| Declination (J2000) | −20° 02′ 14″ |
| Space velocity (relative to the Sun) | 15.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.48). Visible from the whole Southern Hemisphere and north to latitude 70° N. South of latitude 70° S it never sets. 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 1832. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.4 million years.
The Sun seen from there
From a planet around ψ Oph, the Sun would look like a star of magnitude 8.70, 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 80655 8.39 light-years
- HIP 78885 15.2 light-years
- HIP 78769 15.4 light-years
- HIP 78704 16.8 light-years
- HIP 80570 18.6 light-years
- HIP 80784 19.6 light-years
- HIP 78785 19.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.