Star · G6
HIP 21743
HIP 21743 is a giant star of spectral type G6 in the constellation Eridanus, 317.5 light-years from the Sun.
| Constellation | Eridanus |
|---|---|
| Distance | 317.5 light-years (97.3 pc) |
| Apparent magnitude | magnitude 5.56 |
| Absolute magnitude | magnitude 0.62 |
| Spectral type | G6 |
| Surface temperature | 4,930 K |
| Luminosity | 68.8 L☉ |
| Radius | 11.4 R☉ |
| Mass | 3.04 M☉ (estimated) |
| Right ascension (J2000) | 4h 40m 06.8s |
| Declination (J2000) | −24° 28′ 57″ |
| Space velocity (relative to the Sun) | 35.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.56). Visible from the whole Southern Hemisphere and north to latitude 66° N. South of latitude 66° 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 1708. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.6 million years.
The Sun seen from there
From a planet around HIP 21743, the Sun would look like a star of magnitude 9.77, 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):
- HIP 21940 13.0 light-years
- HIP 20765 16.8 light-years
- HIP 22399 18.1 light-years
- HIP 20900 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.