The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here:

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.


Judith Korth



The TOI-763 system : Sub-Neptunes orbiting a Sun-like star


  • M. Fridlund
  • J. Livingston
  • D. Gandolfi
  • C. M. Persson
  • K. W.F. Lam
  • K. G. Stassun
  • C. Hellier
  • J. Korth
  • A. P. Hatzes
  • L. Malavolta
  • R. Luque
  • S. Redfield
  • E. W. Guenther
  • S. Albrecht
  • O. Barragan
  • S. Benatti
  • L. Bouma
  • J. Cabrera
  • W. D. Cochran
  • S. Csizmadia
  • F. Dai
  • H. J. Deeg
  • M. Esposito
  • I. Georgieva
  • S. Grziwa
  • L. González Cuesta
  • T. Hirano
  • J. M. Jenkins
  • P. Kabath
  • E. Knudstrup
  • D. W. Latham
  • S. Mathur
  • S. E. Mullally
  • N. Narita
  • G. Nowak
  • A. O.H. Olofsson
  • E. Palle
  • M. Pätzold
  • E. Pompei
  • H. Rauer
  • G. Ricker
  • F. Rodler
  • S. Seager
  • L. M. Serrano
  • A. M.S. Smith
  • L. Spina
  • J. Subjak
  • P. Tenenbaum
  • E. B. Ting
  • A. Vanderburg
  • R. Vanderspek
  • V. Van Eylen
  • S. Villanueva
  • J. N. Winn

Summary, in English

We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of Pb = 5.6 d, a mass of Mb = 9.8 ± 0.8 M⊕, and a radius of Rb = 2.37 ± 0.10 R⊕. The second transiting planet, TOI-763 c, has an orbital period of Pc = 12.3 d, a mass of Mc = 9.3 ± 1.0 M⊕, and a radius of Rc = 2.87 ± 0.11 R⊕. We find the outermost planet candidate to orbit the star with a period of ∼48 d. If confirmed as a planet, it would have a minimum mass of Md = 9.5 ± 1.6 M⊕. We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.

Publishing year







Monthly Notices of the Royal Astronomical Society





Document type

Journal article


Oxford University Press


  • planets and satellites: detection
  • planets and satellites: individual: TIC 178819686
  • planets and satellites: individual: TOI-763




  • ISSN: 0035-8711