Star · G2III
84 Her
84 Her is a giant star of spectral type G2III in the constellation Hercules, 128.4 light-years from the Sun.
| Other names | HIP 86731 |
|---|---|
| Constellation | Hercules |
| Distance | 128.4 light-years (39.4 pc) |
| Apparent magnitude | magnitude 5.73 |
| Absolute magnitude | magnitude 2.75 |
| Spectral type | G2III |
| Surface temperature | 5,660 K |
| Luminosity | 7.52 L☉ |
| Radius | 2.85 R☉ |
| Mass | 1.66 M☉ (estimated) |
| Right ascension (J2000) | 17h 43m 21.6s |
| Declination (J2000) | +24° 19′ 40″ |
| Space velocity (relative to the Sun) | 34.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.73). 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 1898. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.3 million years.
The Sun seen from there
From a planet around 84 Her, the Sun would look like a star of magnitude 7.81, in the direction where our sky has the constellation Lepus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.