Star · K4II
105 Her
105 Her is a bright giant star of spectral type K4II in the constellation Hercules, 1,223 light-years from the Sun.
| Other names | HIP 89773 |
|---|---|
| Constellation | Hercules |
| Distance | 1,223 light-years (375.0 pc) |
| Apparent magnitude | magnitude 5.30 |
| Absolute magnitude | magnitude −2.57 |
| Spectral type | K4II |
| Surface temperature | 3,780 K |
| Luminosity | 3,410 L☉ |
| Radius | 136 R☉ |
| Mass | 9.28 M☉ (estimated) |
| Right ascension (J2000) | 18h 19m 10.7s |
| Declination (J2000) | +24° 26′ 46″ |
| Space velocity (relative to the Sun) | 26.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.30). Visible from the whole Northern Hemisphere and south to latitude 66° S. North of latitude 66° N 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 803. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 22 million years.
The Sun seen from there
From a planet around 105 Her, the Sun would look like a star of magnitude 12.70, in the direction where our sky has the constellation Canis Major. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.