Star · A7IV
45 Cap
45 Cap is a subgiant star of spectral type A7IV in the constellation Capricornus, 177.2 light-years from the Sun.
| Other names | HIP 107302 |
|---|---|
| Constellation | Capricornus |
| Distance | 177.2 light-years (54.3 pc) |
| Apparent magnitude | magnitude 5.96 |
| Absolute magnitude | magnitude 2.29 |
| Spectral type | A7IV |
| Surface temperature | 8,020 K |
| Luminosity | 11 L☉ |
| Radius | 1.72 R☉ |
| Mass | 1.82 M☉ (estimated) |
| Right ascension (J2000) | 21h 44m 01.0s |
| Declination (J2000) | −14° 44′ 58″ |
| Space velocity (relative to the Sun) | 8.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.96). Visible from the whole Southern Hemisphere and north to latitude 75° N. South of latitude 75° S it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1849. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.1 million years.
The Sun seen from there
From a planet around 45 Cap, the Sun would look like a star of magnitude 8.50, in the direction where our sky has the constellation Leo. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Nashira 9.14 light-years
- HIP 108095 12.4 light-years
- HIP 106741 13.4 light-years
- HIP 107068 15.9 light-years
- HIP 107001 16.2 light-years
- HIP 107454 16.4 light-years
- HIP 109122 16.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.