Star · G2 IV-V
HD 221420
HD 221420 is a main-sequence star of spectral type G2 IV-V in the constellation Octans, 101.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | GJ 4340 · HIP 116250 |
|---|---|
| Constellation | Octans |
| Distance | 101.6 light-years (31.2 pc) |
| Apparent magnitude | magnitude 5.82 |
| Absolute magnitude | magnitude 3.35 |
| Spectral type | G2 IV-V |
| Surface temperature | 5,850 K |
| Luminosity | 4.01 L☉ |
| Radius | 1.95 R☉ |
| Mass | 1.35 M☉ |
| Age | 3.7 billion years |
| Metallicity [Fe/H] | 0.33 |
| Right ascension (J2000) | 23h 33m 19.6s |
| Declination (J2000) | −77° 23′ 07″ |
| Space velocity (relative to the Sun) | 26.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.82). Visible from the whole Southern Hemisphere and north to latitude 13° N. South of latitude 13° S it never sets.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1924. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around HD 221420, the Sun would look like a star of magnitude 7.30, in the direction where our sky has the constellation Draco. It would be invisible to the naked eye.
Planets
- HD 221420 b 10,100-day orbit · 12 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEA J012057.06-764216.4 12.5 light-years
- HIP 8224 13.6 light-years
- HIP 8701 14.2 light-years
- ν Ind 14.4 light-years
- Gl 855.1B 14.4 light-years
- HIP 116063 14.8 light-years
- HIP 57 14.9 light-years
- HIP 105612 15.4 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.