WASP-13

[2][7] According to SIMBAD, WASP-13 was first observed in 1997, when it was catalogued by astronomers measuring the proper motion of stars in regions of the sky where galaxies are detected.

[6] Between November 27, 2006, and April 1, 2007, the SuperWASP-North telescope in the Canary Islands observed WASP-13; analysis of the data suggested that a planet could be in the orbit of the star.

The Fibre-Fed Echelle Spectrograph on the Nordic Optical Telescope gathered additional measurements of WASP-13's spectrum, allowing astronomers to determine WASP-13's characteristics.

The star's effective temperature, at 5,911 K, is slightly hotter than that of the Sun, and the radius of 1.58 R☉ is also larger, leading to a bolometric luminosity of 2.9 L☉.

The evolutionary status of WASP-13, as shown from its position in the Hertsprung-Russel diagram is near the main sequence turnoff, and it is considered very close to exhausting its core hydrogen and becoming a subgiant.

The telescope, housed at the Haute-Provence Observatory , which was used to collect radial velocity measurements