Star · F8V
HIP 20781
HIP 20781 is a main-sequence star of spectral type F8V in the constellation Caelum, 106.6 light-years from the Sun.
| Constellation | Caelum |
|---|---|
| Distance | 106.6 light-years (32.7 pc) |
| Apparent magnitude | magnitude 6.10 |
| Absolute magnitude | magnitude 3.53 |
| Spectral type | F8V |
| Surface temperature | 6,530 K |
| Luminosity | 3.31 L☉ |
| Radius | 1.42 R☉ |
| Mass | 1.35 M☉ (estimated) |
| Right ascension (J2000) | 4h 27m 06.0s |
| Declination (J2000) | −46° 56′ 51″ |
| Space velocity (relative to the Sun) | 49.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.10). Visible from the whole Southern Hemisphere and north to latitude 43° N. South of latitude 43° S it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1919. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.9 million years.
The Sun seen from there
From a planet around HIP 20781, the Sun would look like a star of magnitude 7.40, in the direction where our sky has the constellation Hercules. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.