WASP-2

Planetary system · 499.8 light-years away

WASP-2 is 500 light-years from the Sun. The NASA Exoplanet Archive lists 1 planet around this K1 star; the first was found in 2007 by transit (SuperWASP).

Fly there in 3D

Worth knowing

WASP-2 b goes round its star every 2.15 days, 41 times as often as Mercury goes round the Sun.

WASP-2 is one of 2 stars in its system. The position of the other star is not catalogued, so only WASP-2 and its planets are drawn.

The star

Spectral typeK1
Surface temperature5,180 K
Mass0.895 solar masses
Radius0.866 solar radii
Luminosity0.486 times the Sun
Apparent magnitude11.728
Ageabout 8.2 billion years
Distance from the Sun499.8 light-years (153.2 parsecs)
Position (J2000)RA 307.7256°, Dec 6.4293°
ConstellationDelphinus

Planets (1)

PlanetYearOrbitRadiusMassFound
WASP-2 b2.15 days0.0314 AU12.117 R⊕295.9 M⊕Transit, 2007

Values are the NASA Exoplanet Archive’s composite parameters. A radius marked estimated comes from a mass–radius relation; a mass marked minimum is M sin i. Planet sizes and colours in the 3D view are renderings: none of these worlds has been photographed as more than a point of light.

The planets, compared

For a star of 5,180 K, 0.49 times as bright as the Sun, the habitable zone, where starlight could keep water liquid on a rocky surface, runs from about 0.69 to 1.23 AU. None of its known planets orbits inside it. The zone says how much starlight arrives, not whether a planet has water or air. The edges follow Kopparapu et al. (2014), as the 3D view draws them.

The light you see left 500 years ago, around 1530.

Nearest systems to it

Also found by SuperWASP

Sources

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