WASP-19, formally named Wattle,^[8] is a magnitude 12.3 star about 869 light-years (266 parsecs) away, located in the Vela constellation of the southern hemisphere.^[9] This star has been found to host a transiting hot Jupiter-type planet in tight orbit.

WASP-19 is older than the Sun, has a fraction of heavy elements above the solar abundance, and is rotating rapidly, being spun up by the tides raised by the giant planet on a close orbit.^[5]

The designation WASP-19 indicates that this was the 19th star found to have a planet by the Wide Angle Search for Planets.

In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project.^[10] The approved names were proposed by a team from Brandon Park Primary School in Wheelers Hill (Melbourne, Australia), led by scientist Lance Kelly and teacher David Maierhofer ^[11] and announced in June 2023. WASP-19 is named "Wattle" and its planet is named "Banksia", after the plant genera Wattle (specifically the golden wattle Acacia pycnantha) and Banksia (specifically the scarlet banksia Banksia coccinea) respectively.^[8]

In December 2009, the SuperWASP project announced that a hot Jupiter type exoplanet, WASP-19b, was orbiting very close to this star and with the shortest orbital period of any transiting exoplanet known at the time.^[9]

• List of extrasolar planets