WASP-42 is a K-type main-sequence star about 580 light-years away in the constellation Centaurus. Its surface temperature is 5315±79 K. WASP-42 is similar to the Sun in concentration of heavy elements, with metallicity ([Fe/H]) of 0.05±0.13, and is much older than the Sun at 11.3+1.5−4.8 billion years. The star does exhibit starspot activity as is typical for its spectral class. Multiplicity surveys did not detect any stellar companions to WASP-42 in 2017.
Planetary system In 2012, one planet, named WASP-42b, was discovered on a tight, mildly eccentric orbit. The planetary equilibrium temperature is 1,021±19 K.
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