Star · M0 III
Mirach
Mirach is a giant star of spectral type M0 III in the constellation Andromeda, 197.4 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | β And · HD 6860 · Gl 53.3 · HIP 5447 |
|---|---|
| Constellation | Andromeda |
| Distance | 197.4 light-years (60.5 pc) |
| Apparent magnitude | magnitude 2.07 |
| Absolute magnitude | magnitude −1.84 |
| Spectral type | M0 III |
| Surface temperature | 3,800 K |
| Luminosity | 1,670 L☉ |
| Radius | 86.4 R☉ |
| Mass | 2.49 M☉ |
| Metallicity [Fe/H] | -0.03 |
| Right ascension (J2000) | 1h 09m 43.9s |
| Declination (J2000) | +35° 37′ 14″ |
| Space velocity (relative to the Sun) | 59.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.07). Visible from the whole Northern Hemisphere and south to latitude 54° S. North of latitude 54° 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 1829. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.5 million years.
The Sun seen from there
From a planet around Mirach, the Sun would look like a star of magnitude 8.74, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Planets
- HD 6860 b 664-day orbit · 11.9 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.