Star · K0 III
Ain
Ain is a giant star of spectral type K0 III in the constellation Taurus, 145.8 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | ε Tau · eps Tau · HIP 20889 |
|---|---|
| Constellation | Taurus |
| Distance | 145.8 light-years (44.7 pc) |
| Apparent magnitude | magnitude 3.53 |
| Absolute magnitude | magnitude 0.28 |
| Spectral type | K0 III |
| Surface temperature | 4,880 K |
| Luminosity | 78.1 L☉ |
| Radius | 12.4 R☉ |
| Mass | 2.57 M☉ |
| Metallicity [Fe/H] | 0.10 |
| Right ascension (J2000) | 4h 28m 37.0s |
| Declination (J2000) | +19° 10′ 50″ |
| Space velocity (relative to the Sun) | 45.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.53). Visible from the whole Northern Hemisphere and south to latitude 71° S. North of latitude 71° N 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 1880. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.6 million years.
The Sun seen from there
From a planet around Ain, the Sun would look like a star of magnitude 8.08, in the direction where our sky has the constellation Scorpius. It would be invisible to the naked eye.
Planets
- eps Tau b 586-day orbit · 12.7 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.