Star · A
20 Cap
20 Cap is a main-sequence star of spectral type A in the constellation Capricornus, 697.0 light-years from the Sun.
| Other names | HIP 103616 |
|---|---|
| Constellation | Capricornus |
| Distance | 697.0 light-years (213.7 pc) |
| Apparent magnitude | magnitude 6.26 |
| Absolute magnitude | magnitude −0.39 |
| Spectral type | A |
| Surface temperature | 11,740 K |
| Luminosity | 224 L☉ |
| Radius | 3.61 R☉ |
| Mass | 4.26 M☉ (estimated) |
| Right ascension (J2000) | 20h 59m 36.1s |
| Declination (J2000) | −19° 02′ 07″ |
| Space velocity (relative to the Sun) | 24.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.26). Visible from the whole Southern Hemisphere and north to latitude 71° N. South of latitude 71° 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 1329. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
The Sun seen from there
From a planet around 20 Cap, the Sun would look like a star of magnitude 11.48, in the direction where our sky has the constellation Cancer. 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.