Star · F9V
HATS-31
HATS-31 is a main-sequence star of spectral type F9V in the constellation Hydra, 2,524 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Hydra |
|---|---|
| Distance | 2,524 light-years (774.0 pc) |
| Apparent magnitude | magnitude 13.32 |
| Absolute magnitude | magnitude 3.88 |
| Spectral type | F9V |
| Surface temperature | 6,050 K |
| Luminosity | 4.16 L☉ |
| Radius | 1.87 R☉ |
| Mass | 1.28 M☉ |
| Age | 4.3 billion years |
| Metallicity [Fe/H] | 0.00 |
| Right ascension (J2000) | 12h 46m 48.7s |
| Declination (J2000) | −24° 25′ 39″ |
| Space velocity (relative to the Sun) | 9.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.32. Visible from the whole Southern Hemisphere and north to latitude 66° N. South of latitude 66° S it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 499 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 45 million years.
The Sun seen from there
From a planet around HATS-31, the Sun would look like a star of magnitude 14.27, in the direction where our sky has the constellation Andromeda. It would be invisible to the naked eye.
Planets
- HATS-31 b 3.38-day orbit · 18.4 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.