Star · A6V
η Hor
η Hor is a main-sequence star of spectral type A6V in the constellation Horologium, 129.4 light-years from the Sun.
| Other names | HIP 12225 |
|---|---|
| Constellation | Horologium |
| Distance | 129.4 light-years (39.7 pc) |
| Apparent magnitude | magnitude 5.30 |
| Absolute magnitude | magnitude 2.31 |
| Spectral type | A6V |
| Surface temperature | 7,530 K |
| Luminosity | 10.4 L☉ |
| Radius | 1.89 R☉ |
| Mass | 1.79 M☉ (estimated) |
| Right ascension (J2000) | 2h 37m 24.4s |
| Declination (J2000) | −52° 32′ 35″ |
| Space velocity (relative to the Sun) | 19.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.30). Visible from the whole Southern Hemisphere and north to latitude 37° N. South of latitude 37° S it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1897. 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 η Hor, the Sun would look like a star of magnitude 7.82, in the direction where our sky has the constellation Boötes. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 11877 5.45 light-years
- 2MASS J02410564-5511466 10.5 light-years
- HD 18599 10.9 light-years
- HIP 13357 12.4 light-years
- 2MASS J02235464-5815067 13.6 light-years
- HIP 8987 14.5 light-years
- HIP 12859 15.2 light-years
- HIP 15358 15.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.