Star · K0
WASP-139
WASP-139 is a main-sequence star of spectral type K0 in the constellation Eridanus, 693.0 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Eridanus |
|---|---|
| Distance | 693.0 light-years (212.5 pc) |
| Apparent magnitude | magnitude 12.46 |
| Absolute magnitude | magnitude 5.82 |
| Spectral type | K0 |
| Surface temperature | 5,310 K |
| Luminosity | 0.451 L☉ |
| Radius | 0.8 R☉ |
| Mass | 0.92 M☉ |
| Age | 0.5 billion years |
| Metallicity [Fe/H] | 0.20 |
| Right ascension (J2000) | 3h 18m 14.9s |
| Declination (J2000) | −41° 18′ 07″ |
| Space velocity (relative to the Sun) | 29.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.46. Visible from the whole Southern Hemisphere and north to latitude 49° N. South of latitude 49° 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 1333. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 12 million years.
The Sun seen from there
From a planet around WASP-139, the Sun would look like a star of magnitude 11.47, in the direction where our sky has the constellation Boötes. It would be invisible to the naked eye.
Planets
- WASP-139 b 5.92-day orbit · 8.97 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.