Star · K0III
θ Cha
θ Cha is a giant star of spectral type K0III in the constellation Chamaeleon, 152.8 light-years from the Sun.
| Other names | HIP 40888 |
|---|---|
| Constellation | Chamaeleon |
| Distance | 152.8 light-years (46.8 pc) |
| Apparent magnitude | magnitude 4.34 |
| Absolute magnitude | magnitude 0.99 |
| Spectral type | K0III |
| Surface temperature | 4,390 K |
| Luminosity | 68.6 L☉ |
| Radius | 14.3 R☉ |
| Mass | 3.04 M☉ (estimated) |
| Right ascension (J2000) | 8h 20m 38.6s |
| Declination (J2000) | −77° 29′ 04″ |
| Space velocity (relative to the Sun) | 37.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.34). Visible from the whole Southern Hemisphere and north to latitude 13° N. South of latitude 13° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1873. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.7 million years.
The Sun seen from there
From a planet around θ Cha, the Sun would look like a star of magnitude 8.18, in the direction where our sky has the constellation Cepheus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 39887 4.90 light-years
- HIP 46046 14.2 light-years
- 2MASS J08204440-7514571 14.9 light-years
- HIP 48095 15.8 light-years
- ζ Vol 16.0 light-years
- HIP 30258 17.2 light-years
- HIP 31931 18.5 light-years
- 2MASS J09555995-7342489 18.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.