Star · A5V
25 Her
25 Her is a main-sequence star of spectral type A5V in the constellation Hercules, 247.3 light-years from the Sun.
| Other names | HIP 80460 |
|---|---|
| Constellation | Hercules |
| Distance | 247.3 light-years (75.8 pc) |
| Apparent magnitude | magnitude 5.53 |
| Absolute magnitude | magnitude 1.13 |
| Spectral type | A5V |
| Surface temperature | 8,370 K |
| Luminosity | 33.1 L☉ |
| Radius | 2.74 R☉ |
| Mass | 2.47 M☉ (estimated) |
| Right ascension (J2000) | 16h 25m 24.2s |
| Declination (J2000) | +37° 23′ 39″ |
| Space velocity (relative to the Sun) | 6.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.53). Visible from the whole Northern Hemisphere and south to latitude 53° S. North of latitude 53° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1779. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.4 million years.
The Sun seen from there
From a planet around 25 Her, the Sun would look like a star of magnitude 9.23, 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):
- Ogma 6.14 light-years
- HIP 80258 8.35 light-years
- 2MASS J16231308+3950419 13.0 light-years
- HIP 79480 17.4 light-years
- HIP 81732 19.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.