Star · M6III
θ Aps
θ Aps is a giant star of spectral type M6III in the constellation Apus, 389.2 light-years from the Sun.
| Other names | HIP 68815 |
|---|---|
| Constellation | Apus |
| Distance | 389.2 light-years (119.3 pc) |
| Apparent magnitude | magnitude 5.69 |
| Absolute magnitude | magnitude 0.31 |
| Spectral type | M6III |
| Surface temperature | 4,230 K |
| Luminosity | 146 L☉ |
| Radius | 22.5 R☉ |
| Mass | 3.77 M☉ (estimated) |
| Right ascension (J2000) | 14h 05m 19.9s |
| Declination (J2000) | −76° 47′ 48″ |
| Space velocity (relative to the Sun) | 54.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.69). 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 1637. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.9 million years.
The Sun seen from there
From a planet around θ Aps, the Sun would look like a star of magnitude 10.21, in the direction where our sky has the constellation Cassiopeia. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.