Star · G2
HD 21520
HD 21520 is a main-sequence star of spectral type G2 in the constellation Eridanus, 259.1 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 16038 |
|---|---|
| Constellation | Eridanus |
| Distance | 259.1 light-years (79.4 pc) |
| Apparent magnitude | magnitude 9.17 |
| Absolute magnitude | magnitude 4.67 |
| Spectral type | G2 |
| Surface temperature | 5,870 K |
| Luminosity | 1.16 L☉ |
| Radius | 1.04 R☉ |
| Mass | 1.09 M☉ |
| Age | 5.3 billion years |
| Metallicity [Fe/H] | 0.05 |
| Right ascension (J2000) | 3h 26m 33.7s |
| Declination (J2000) | −43° 36′ 49″ |
| Space velocity (relative to the Sun) | 18.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.17. Visible from the whole Southern Hemisphere and north to latitude 46° N. South of latitude 46° 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 1767. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.6 million years.
The Sun seen from there
From a planet around HD 21520, the Sun would look like a star of magnitude 9.33, in the direction where our sky has the constellation Boötes. It would be invisible to the naked eye.
Planets
- HD 21520 b 25.1-day orbit · 2.7 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 15407 7.96 light-years
- HIP 16864 13.4 light-years
- HIP 15545 15.2 light-years
- HIP 16696 17.8 light-years
- HIP 17751 18.0 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.