Star · F9
WASP-20
WASP-20 is a main-sequence star of spectral type F9 in the constellation Cetus, 940.0 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cetus |
|---|---|
| Distance | 940.0 light-years (288.2 pc) |
| Apparent magnitude | magnitude 10.74 |
| Absolute magnitude | magnitude 3.44 |
| Spectral type | F9 |
| Surface temperature | 5,940 K |
| Luminosity | 1.73 L☉ |
| Radius | 1.24 R☉ |
| Mass | 1.2 M☉ |
| Age | 7.0 billion years |
| Metallicity [Fe/H] | -0.01 |
| Right ascension (J2000) | 0h 20m 38.5s |
| Declination (J2000) | −23° 56′ 09″ |
| Space velocity (relative to the Sun) | 20.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.74. 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 September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1086. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 17 million years.
The Sun seen from there
From a planet around WASP-20, the Sun would look like a star of magnitude 12.13, in the direction where our sky has the constellation Coma Berenices. It would be invisible to the naked eye.
Planets
- WASP-20 b 4.9-day orbit · 15.5 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.