Star · M0III
HATS-57
HATS-57 is a giant star of spectral type M0III in the constellation Eridanus, 909.0 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Eridanus |
|---|---|
| Distance | 909.0 light-years (278.7 pc) |
| Apparent magnitude | magnitude 11.75 |
| Absolute magnitude | magnitude 4.52 |
| Spectral type | M0III |
| Surface temperature | 5,590 K |
| Luminosity | 0.805 L☉ |
| Radius | 0.96 R☉ |
| Mass | 1.03 M☉ |
| Age | 2.5 billion years |
| Metallicity [Fe/H] | 0.27 |
| Right ascension (J2000) | 4h 03m 47.6s |
| Declination (J2000) | −19° 03′ 24″ |
| Space velocity (relative to the Sun) | 25.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.75. Visible from the whole Southern Hemisphere and north to latitude 71° N. South of latitude 71° S 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 1117. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 16 million years.
The Sun seen from there
From a planet around HATS-57, the Sun would look like a star of magnitude 12.06, in the direction where our sky has the constellation Hercules. It would be invisible to the naked eye.
Planets
- HATS-57 b 2.35-day orbit · 12.8 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.