Star · F0 IV
51 Eri
51 Eri is a main-sequence star of spectral type F0 IV in the constellation Eridanus, 97.5 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 21547 |
|---|---|
| Constellation | Eridanus |
| Distance | 97.5 light-years (29.9 pc) |
| Apparent magnitude | magnitude 5.22 |
| Absolute magnitude | magnitude 2.84 |
| Spectral type | F0 IV |
| Surface temperature | 7,420 K |
| Luminosity | 5.72 L☉ |
| Radius | 1.45 R☉ |
| Mass | 1.75 M☉ |
| Age | 0.0 billion years |
| Metallicity [Fe/H] | 0.13 |
| Right ascension (J2000) | 4h 37m 36.1s |
| Declination (J2000) | −2° 28′ 25″ |
| Space velocity (relative to the Sun) | 23.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.22). Visible from the whole Southern Hemisphere and north to latitude 88° N. 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 1928. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.7 million years.
The Sun seen from there
From a planet around 51 Eri, the Sun would look like a star of magnitude 7.21, in the direction where our sky has the constellation Ophiuchus. It would be invisible to the naked eye.
Planets
- 51 Eri b 9,100-day orbit
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3305 6.96 light-years
- WISEA J042236.95-044203.5 8.35 light-years
- HIP 20142 8.55 light-years
- CWISEP J042455.68+000221.4 11.5 light-years
- HIP 21006 12.4 light-years
- HD 30562 14.0 light-years
- PSO J069.7303+04.3834 14.6 light-years
- Gl 165.2 14.8 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.