Star · G1V
WASP-81
WASP-81 is a main-sequence star of spectral type G1V in the constellation Aquila, 1,300 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Aquila |
|---|---|
| Distance | 1,300 light-years (398.5 pc) |
| Apparent magnitude | magnitude 12.47 |
| Absolute magnitude | magnitude 4.47 |
| Spectral type | G1V |
| Surface temperature | 5,870 K |
| Luminosity | 1.76 L☉ |
| Radius | 1.28 R☉ |
| Mass | 1.08 M☉ |
| Metallicity [Fe/H] | -0.36 |
| Right ascension (J2000) | 20h 16m 49.9s |
| Declination (J2000) | +3° 17′ 38″ |
| Space velocity (relative to the Sun) | 58.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.47. Visible from the whole Northern Hemisphere and south to latitude 87° S. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 726. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 23 million years.
The Sun seen from there
From a planet around WASP-81, the Sun would look like a star of magnitude 12.83, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Planets
- WASP-81 b 2.72-day orbit · 16 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.