Star · A0V
ε Her
ε Her is a main-sequence star of spectral type A0V in the constellation Hercules, 165.0 light-years from the Sun.
| Other names | HIP 83207 |
|---|---|
| Constellation | Hercules |
| Distance | 165.0 light-years (50.6 pc) |
| Apparent magnitude | magnitude 3.92 |
| Absolute magnitude | magnitude 0.40 |
| Spectral type | A0V |
| Surface temperature | 10,360 K |
| Luminosity | 86.3 L☉ |
| Radius | 2.89 R☉ |
| Mass | 3.25 M☉ (estimated) |
| Right ascension (J2000) | 17h 00m 17.4s |
| Declination (J2000) | +30° 55′ 35″ |
| Space velocity (relative to the Sun) | 28.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.92). Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° 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 1861. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.9 million years.
The Sun seen from there
From a planet around ε Her, the Sun would look like a star of magnitude 8.35, 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 83630 8.76 light-years
- SDSS J171049.35+332325.2 9.76 light-years
- SDSS J164438.14+284614.5 11.9 light-years
- SDSS J164238.60+330855.6 13.7 light-years
- SIMP J17084651+260644 14.9 light-years
- HIP 84740 15.6 light-years
- SDSS J163748.65+275254.6 16.6 light-years
- HIP 81911 17.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.