Star · F3IV
χ¹ Hya
χ¹ Hya is a subgiant star of spectral type F3IV in the constellation Hydra, 144.8 light-years from the Sun.
| Other names | GJ 3642A · HIP 54204 |
|---|---|
| Constellation | Hydra |
| Distance | 144.8 light-years (44.4 pc) |
| Apparent magnitude | magnitude 4.92 |
| Absolute magnitude | magnitude 1.68 |
| Spectral type | F3IV |
| Surface temperature | 7,050 K |
| Luminosity | 18 L☉ |
| Radius | 2.85 R☉ |
| Mass | 2.08 M☉ (estimated) |
| Right ascension (J2000) | 11h 05m 19.9s |
| Declination (J2000) | −27° 17′ 37″ |
| Space velocity (relative to the Sun) | 43.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.92). Visible from the whole Southern Hemisphere and north to latitude 63° N. South of latitude 63° S it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1881. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.6 million years.
The Sun seen from there
From a planet around χ¹ Hya, the Sun would look like a star of magnitude 8.07, in the direction where our sky has the constellation Pegasus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASS J11001126-2718386 8.99 light-years
- HIP 54362 10.9 light-years
- HIP 54530 11.1 light-years
- HIP 54603 12.2 light-years
- GJ 2084A 13.4 light-years
- PSO J168.1800-27.2264 14.8 light-years
- HD 98649 15.1 light-years
- HIP 55487 16.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.