Star · B2IV
102 Her
102 Her is a subgiant star of spectral type B2IV in the constellation Hercules, 1,163 light-years from the Sun.
| Other names | HIP 88886 |
|---|---|
| Constellation | Hercules |
| Distance | 1,163 light-years (356.7 pc) |
| Apparent magnitude | magnitude 4.37 |
| Absolute magnitude | magnitude −3.39 |
| Spectral type | B2IV |
| Surface temperature | 12,780 K |
| Luminosity | 4,210 L☉ |
| Radius | 13.2 R☉ |
| Mass | 9.86 M☉ (estimated) |
| Right ascension (J2000) | 18h 08m 45.5s |
| Declination (J2000) | +20° 48′ 52″ |
| Space velocity (relative to the Sun) | 18.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.37). Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° 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 863. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 21 million years.
The Sun seen from there
From a planet around 102 Her, the Sun would look like a star of magnitude 12.59, in the direction where our sky has the constellation Lepus. 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.