Star · F2IV
27 Cap
27 Cap is a subgiant star of spectral type F2IV in the constellation Capricornus, 172.5 light-years from the Sun.
| Other names | HIP 104452 |
|---|---|
| Constellation | Capricornus |
| Distance | 172.5 light-years (52.9 pc) |
| Apparent magnitude | magnitude 6.25 |
| Absolute magnitude | magnitude 2.63 |
| Spectral type | F2IV |
| Surface temperature | 6,960 K |
| Luminosity | 7.52 L☉ |
| Radius | 1.89 R☉ |
| Mass | 1.66 M☉ (estimated) |
| Right ascension (J2000) | 21h 09m 33.0s |
| Declination (J2000) | −20° 33′ 24″ |
| Space velocity (relative to the Sun) | 65.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.25). Visible from the whole Southern Hemisphere and north to latitude 69° N. South of latitude 69° 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 1853. 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 27 Cap, the Sun would look like a star of magnitude 8.45, in the direction where our sky has the constellation Cancer. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 104777 4.73 light-years
- HIP 104376 4.77 light-years
- HIP 103896 8.01 light-years
- HIP 104864 10.1 light-years
- HIP 104504 14.8 light-years
- HIP 104549 16.1 light-years
- HIP 105368 16.5 light-years
- HIP 104476 16.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.