HAT-P-38b: A Saturn-mass planet transiting a late G star

Bun'ei Sato, Joel D. Hartman, Gaspár Á Bakos, Bence Béky, Guillermo Torres, David W. Latham, Géza Kovács, Zoltán Csubry, Kaloyan Penev, Robert W. Noyes, Lars A. Buchhave, Samuel N. Quinn, Mark Everett, Gilbert A. Esquerdo, Debra A. Fischer, Andrew W. Howard, John A. Johnson, Geoff W. Marcy, Dimitar D. Sasselov, Tamás SzklenárJozsef Lázár, István Papp, Pál Sári

Research output: Contribution to journalArticle

4 Citations (Scopus)


We report on the discovery of HAT-P-38b, a Saturn-mass exoplanet, transiting the V = 12.56 dwarf star GSC 2314-00559 on a P = 4.6404 d circular orbit. The host star is a 0.89 Mocir late G dwarf, with solar metallicity and a radius of 0.92 Rocir. The planetary companion has a mass of 0.27 MJ and a radius of 0.82 RJ. HAT-P-38b is one of the planets the mass and radius of which have ever been discovered to be the closest to those of Saturn.

Original languageEnglish
JournalPublications of the Astronomical Society of Japan
Issue number5
Publication statusPublished - Oct 25 2012



  • Stars: individual (GSC 2314-00559)
  • Stars: planetary systems
  • Techniques: photometric
  • Techniques: spectroscopic

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Sato, B., Hartman, J. D., Bakos, G. Á., Béky, B., Torres, G., Latham, D. W., Kovács, G., Csubry, Z., Penev, K., Noyes, R. W., Buchhave, L. A., Quinn, S. N., Everett, M., Esquerdo, G. A., Fischer, D. A., Howard, A. W., Johnson, J. A., Marcy, G. W., Sasselov, D. D., ... Sári, P. (2012). HAT-P-38b: A Saturn-mass planet transiting a late G star. Publications of the Astronomical Society of Japan, 64(5). https://doi.org/10.1093/pasj/64.5.97