Star · A4V
77 Her
77 Her is a main-sequence star of spectral type A4V in the constellation Hercules, 401.3 light-years from the Sun.
| Other names | HIP 85379 |
|---|---|
| Constellation | Hercules |
| Distance | 401.3 light-years (123.0 pc) |
| Apparent magnitude | magnitude 5.83 |
| Absolute magnitude | magnitude 0.38 |
| Spectral type | A4V |
| Surface temperature | 8,830 K |
| Luminosity | 70 L☉ |
| Radius | 3.58 R☉ |
| Mass | 3.06 M☉ (estimated) |
| Right ascension (J2000) | 17h 26m 44.2s |
| Declination (J2000) | +48° 15′ 36″ |
| Space velocity (relative to the Sun) | 9.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.83). Visible from the whole Northern Hemisphere and south to latitude 42° S. North of latitude 42° 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 1625. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.1 million years.
The Sun seen from there
From a planet around 77 Her, the Sun would look like a star of magnitude 10.28, in the direction where our sky has the constellation Pictor. 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.