Star · K2III
HIP 89772
HIP 89772 is a giant star of spectral type K2III in the constellation Ophiuchus, 151.1 light-years from the Sun.
| Constellation | Ophiuchus |
|---|---|
| Distance | 151.1 light-years (46.3 pc) |
| Apparent magnitude | magnitude 5.41 |
| Absolute magnitude | magnitude 2.08 |
| Spectral type | K2III |
| Surface temperature | 4,550 K |
| Luminosity | 22.2 L☉ |
| Radius | 7.59 R☉ |
| Mass | 2.2 M☉ (estimated) |
| Right ascension (J2000) | 18h 19m 09.5s |
| Declination (J2000) | +7° 15′ 35″ |
| Space velocity (relative to the Sun) | 12.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.41). Visible from the whole Northern Hemisphere and south to latitude 83° 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 1875. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.7 million years.
The Sun seen from there
From a planet around HIP 89772, the Sun would look like a star of magnitude 8.16, in the direction where our sky has the constellation Monoceros. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 88644 9.50 light-years
- HIP 88724 10.0 light-years
- HIP 89000 12.5 light-years
- HIP 88728 13.4 light-years
- HIP 91801 15.8 light-years
- HIP 88227 16.5 light-years
- HIP 87991 20.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.