An Eccentric Massive Jupiter Orbiting a Subgiant on a 9.5-day Period Discovered in the Transiting Exoplanet Survey Satellite Full Frame Images

Joseph E. Rodriguez, Samuel N. Quinn, Chelsea X. Huang, Andrew Vanderburg, Kaloyan Penev, Rafael Brahm, Andrés Jordán, Mma Ikwut-Ukwa, Shelly Tsirulik, David W. Latham, Keivan G. Stassun, Avi Shporer, Carl Ziegler, Elisabeth Matthews, Jason D. Eastman, B. Scott Gaudi, Karen A. Collins, Natalia Guerrero, Howard M. Relles, Thomas BarclayNatalie M. Batalha, Perry Berlind, Allyson Bieryla, L. G. Bouma, Patricia T. Boyd, Jennifer Burt, Michael L. Calkins, Jessie Christiansen, David R. Ciardi, Knicole D. Colón, Dennis M. Conti, Ian J.M. Crossfield, Tansu Daylan, Jason Dittmann, Diana Dragomir, Scott Dynes, Néstor Espinoza, Gilbert A. Esquerdo, Zahra Essack, Aylin Garcia Soto, Ana Glidden, Maximilian N. Günther, Thomas Henning, Jon M. Jenkins, John F. Kielkopf, Akshata Krishnamurthy, Nicholas M. Law, Alan M. Levine, Pablo Lewin, Andrew W. Mann, Edward H. Morgan, Robert L. Morris, Ryan J. Oelkers, Martin Paegert, Joshua Pepper, Elisa V. Quintana, George R. Ricker, Pamela Rowden, Sara Seager, Paula Sarkis, Joshua E. Schlieder, Lizhou Sha, Andrei Tokovinin, Guillermo Torres, Roland K. Vanderspek, Steven Villanueva, Jesus Noel Villaseñor, Joshua N. Winn, Bill Wohler, Ian Wong, Daniel A. Yahalomi, Liang Yu, Zhuchang Zhan, George Zhou

Research output: Contribution to journalArticlepeer-review

44 Scopus citations


We report the discovery of TOI-172 b from the Transiting Exoplanet Survey Satellite (TESS) mission, a massive hot Jupiter transiting a slightly evolved G star with a 9.48-day orbital period. This is the first planet to be confirmed from analysis of only the TESS full frame images, because the host star was not chosen as a two-minute cadence target. From a global analysis of the TESS photometry and follow-up observations carried out by the TESS Follow-up Observing Program Working Group, TOI-172 (TIC 29857954) is a slightly evolved star with an effective temperature of T eff = 5645 ± 50 K, a mass of M = 1.128-0.061 +0.065 M o, radius of R = 1.777-0.044 +0.047 R o, a surface gravity of log g = 3.993-0.028 +0.027, and an age of 7.4-1.5 +1.6. Its planetary companion (TOI-172 b) has a radius of R P = 0.965-0.029 +0.032 R J, a mass of M P = 5.42-0.20 +0.22 M J, and is on an eccentric orbit (e = 0.3806-0.0090 +0.0093 ). TOI-172 b is one of the few known massive giant planets on a highly eccentric short-period orbit. Future study of the atmosphere of this planet and its system architecture offer opportunities to understand the formation and evolution of similar systems.

Original languageEnglish
Article number191
JournalAstronomical Journal
Issue number5
StatePublished - May 2019
Externally publishedYes


  • planetary systems
  • planets and satellites: detection
  • stars: individual (TIC 29857954)


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