Star · A2
κ Ari
κ Ari is a main-sequence star of spectral type A2 in the constellation Aries, 180.9 light-years from the Sun.
| Other names | HIP 9836 |
|---|---|
| Constellation | Aries |
| Distance | 180.9 light-years (55.5 pc) |
| Apparent magnitude | magnitude 5.03 |
| Absolute magnitude | magnitude 1.31 |
| Spectral type | A2 |
| Surface temperature | 8,830 K |
| Luminosity | 29.7 L☉ |
| Radius | 2.33 R☉ |
| Mass | 2.39 M☉ (estimated) |
| Right ascension (J2000) | 2h 06m 33.9s |
| Declination (J2000) | +22° 38′ 54″ |
| Space velocity (relative to the Sun) | 15.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.03). Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° N 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 1845. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.2 million years.
The Sun seen from there
From a planet around κ Ari, the Sun would look like a star of magnitude 8.55, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 9492 8.97 light-years
- HIP 8766 13.0 light-years
- 14 Ari 13.7 light-years
- HIP 9255 14.7 light-years
- 2MASSI J0224367+253704 16.2 light-years
- HIP 11157 16.5 light-years
- 10 Ari 16.8 light-years
- 21 Ari 17.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.