Star · A8V
HIP 20109
HIP 20109 is a main-sequence star of spectral type A8V in the constellation Dorado, 242.8 light-years from the Sun.
| Constellation | Dorado |
|---|---|
| Distance | 242.8 light-years (74.4 pc) |
| Apparent magnitude | magnitude 6.08 |
| Absolute magnitude | magnitude 1.72 |
| Spectral type | A8V |
| Surface temperature | 6,440 K |
| Luminosity | 17.6 L☉ |
| Radius | 3.37 R☉ |
| Mass | 2.06 M☉ (estimated) |
| Right ascension (J2000) | 4h 18m 40.0s |
| Declination (J2000) | −52° 51′ 36″ |
| Space velocity (relative to the Sun) | 37.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.08). Visible from the whole Southern Hemisphere and north to latitude 37° N. South of latitude 37° 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 1783. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.3 million years.
The Sun seen from there
From a planet around HIP 20109, the Sun would look like a star of magnitude 9.19, in the direction where our sky has the constellation Draco. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 20074 1.41 light-years
- HIP 19869 15.7 light-years
- HIP 19593 18.3 light-years
- HIP 18952 19.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.