Star · F2V
73 Oph
73 Oph is a main-sequence star of spectral type F2V in the constellation Ophiuchus, 178.7 light-years from the Sun.
| Other names | HIP 88964 |
|---|---|
| Constellation | Ophiuchus |
| Distance | 178.7 light-years (54.8 pc) |
| Apparent magnitude | magnitude 5.71 |
| Absolute magnitude | magnitude 2.02 |
| Spectral type | F2V |
| Surface temperature | 7,080 K |
| Luminosity | 13.3 L☉ |
| Radius | 2.42 R☉ |
| Mass | 1.91 M☉ (estimated) |
| Right ascension (J2000) | 18h 09m 33.9s |
| Declination (J2000) | +3° 59′ 36″ |
| Space velocity (relative to the Sun) | 15.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.71). Visible from the whole Northern Hemisphere and south to latitude 86° S. 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 1847. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.2 million years.
The Sun seen from there
From a planet around 73 Oph, the Sun would look like a star of magnitude 8.52, in the direction where our sky has the constellation Orion. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HD 164509 14.0 light-years
- HIP 89207 16.9 light-years
- HIP 89601 17.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.