HAT-P-25b: A hot-Jupiter transiting a moderately faint G star

S. N. Quinn, G. A. Bakos, J. Hartman, G. Torres, G. Kovács, D. W. Latham, R. W. Noyes, D. A. Fischer, J. A. Johnson, G. W. Marcy, A. W. Howard, A. Szentgyorgyi, G. Fũrész, L. A. Buchhave, B. Béky, D. D. Sasselov, R. P. Stefanik, G. Perumpilly, M. Everett, J. LázárI. Papp, P. Sári

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


We report the discovery of HAT-P-25b, a transiting extrasolar planet orbiting the V = 13.19 G5 dwarf star GSC 1788-01237, with a period P = 3.652836 0.000019 days, transit epoch Tc = 2455176.85173 0.00047 (BJD - barycentric Julian dates throughout the paper are calculated from Coordinated Universal Time, UTC), and transit duration 0.1174 0.0017days. The host star has a mass of 1.01 0.03 M, radius of 0.96+0.05 - 0.04 R, effective temperature 5500 80K, and metallicity [Fe/H] = +0.31 0.08. The planetary companion has a mass of 0.567 0.022M J and radius of 1.190+0.081 - 0.056R J yielding a mean density of 0.42 0.07 g cm-3.

Original languageEnglish (US)
Article number80
JournalAstrophysical Journal
Issue number1
StatePublished - Jan 20 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • planetary systems
  • stars: individual (HAT-P-25, GSC 1788-01237)
  • techniques: photometric
  • techniques: spectroscopic


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