Star · F6IV
20 Ari
20 Ari is a subgiant star of spectral type F6IV in the constellation Aries, 133.9 light-years from the Sun.
| Other names | HIP 10540 |
|---|---|
| Constellation | Aries |
| Distance | 133.9 light-years (41.1 pc) |
| Apparent magnitude | magnitude 5.79 |
| Absolute magnitude | magnitude 2.72 |
| Spectral type | F6IV |
| Surface temperature | 6,680 K |
| Luminosity | 6.93 L☉ |
| Radius | 1.97 R☉ |
| Mass | 1.62 M☉ (estimated) |
| Right ascension (J2000) | 2h 15m 46.0s |
| Declination (J2000) | +25° 46′ 59″ |
| Space velocity (relative to the Sun) | 44.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.79). Visible from the whole Northern Hemisphere and south to latitude 64° S. North of latitude 64° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1892. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.4 million years.
The Sun seen from there
From a planet around 20 Ari, the Sun would look like a star of magnitude 7.90, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 10679 8.28 light-years
- HIP 10680 8.42 light-years
- HIP 10510 9.16 light-years
- λ Ari 10.9 light-years
- SDSS J020608.97+223559.2 11.1 light-years
- 2MASS J02301551+2704061 11.8 light-years
- HD 12661 12.1 light-years
- PSO J033.2936+20.4493 12.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.