Star · F2III
HIP 81911
HIP 81911 is a giant star of spectral type F2III in the constellation Hercules, 175.0 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 175.0 light-years (53.6 pc) |
| Apparent magnitude | magnitude 6.02 |
| Absolute magnitude | magnitude 2.37 |
| Spectral type | F2III |
| Surface temperature | 7,330 K |
| Luminosity | 9.67 L☉ |
| Radius | 1.93 R☉ |
| Mass | 1.76 M☉ (estimated) |
| Right ascension (J2000) | 16h 43m 51.7s |
| Declination (J2000) | +34° 02′ 20″ |
| Space velocity (relative to the Sun) | 24.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.02). Visible from the whole Northern Hemisphere and south to latitude 56° S. North of latitude 56° N 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 1851. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.1 million years.
The Sun seen from there
From a planet around HIP 81911, the Sun would look like a star of magnitude 8.48, in the direction where our sky has the constellation Caelum. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 83494 13.7 light-years
- SDSS J165031.33+352359.5 14.4 light-years
- SDSS J164238.60+330855.6 16.1 light-years
- HIP 83838 16.9 light-years
- ε Her 17.0 light-years
- TOI-2266 17.2 light-years
- HIP 82068 17.8 light-years
- HIP 81726 18.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.