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

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 Teff = 5645 ± 50 K, a mass of M⋆ = M⊙, radius of R⋆ = R⊙, a surface gravity of log g⋆ = , and an age of . Its planetary companion (TOI-172 b) has a radius of RP = RJ, a mass of MP = MJ, and is on an eccentric orbit ( ). 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.

Keivan G. Stassun | Sara Seager | B. Scott Gaudi | Jason D. Eastman | George R. Ricker | Alan M. Levine | Edward H. Morgan | Joshua N. Winn | Andrei Tokovinin | Jon M. Jenkins | Nicholas M. Law | Robert L. Morris | Avi Shporer | John F. Kielkopf | Jason Dittmann | Rafael Brahm | Paula Sarkis | Tansu Daylan | Steven Villanueva | Elisa V. Quintana | Scott Dynes | Diana Dragomir | Joshua E. Schlieder | Thomas Barclay | Natalia Guerrero | Ana Glidden | Chelsea X. Huang | Akshata Krishnamurthy | Bill Wohler | Samuel N. Quinn | Guillermo Torres | Carl Ziegler | Ryan J. Oelkers | Ian Wong | Ian J. M. Crossfield | David W. Latham | David R. Ciardi | Martin Paegert | Maximilian N. Gunther | Andrew Vanderburg | L. G. Bouma | Joshua Pepper | Perry Berlind | Allyson Bieryla | Howard M. Relles | Karen A. Collins | George Zhou | Andrew W. Mann | Michael L. Calkins | Gilbert A. Esquerdo | Joseph E. Rodriguez | M. Paegert | J. Pepper | K. Stassun | B. Gaudi | Avi Shporer | T. Henning | P. Berlind | M. Calkins | J. Eastman | N. Law | D. Ciardi | R. Morris | A. Tokovinin | D. Latham | A. Vanderburg | J. Jenkins | S. Quinn | S. Seager | G. Torres | J. Winn | J. Christiansen | T. Barclay | E. Quintana | A. Bieryla | G. Esquerdo | I. Crossfield | A. Mann | J. Dittmann | B. Wohler | A. Levine | Liang Yu | J. Schlieder | C. Ziegler | R. Brahm | A. Jord'an | M. Gunther | J. Burt | Lizhou Sha | G. Ricker | R. Vanderspek | K. Collins | N. Guerrero | E. Morgan | D. Dragomir | A. Glidden | L. Bouma | S. Villanueva | N. Espinoza | Z. Essack | J. Kielkopf | E. Matthews | P. Sarkis | P. Boyd | A. Soto | Z. Zhan | R. Oelkers | J. Villasenor | P. Lewin | K. Penev | D. Conti | H. Relles | K. Col'on | T. Daylan | Knicole D. Col'on | N'estor Espinoza | Kaloyan Penev | Andr'es Jord'an | Pamela Rowden | Roland K. Vanderspek | I. Wong | Jennifer Burt | Jessie Christiansen | Elisabeth Matthews | Natalie E. Batalha | Dennis M. Conti | Zahra Essack | A. Krishnamurthy | S. Dynes | Lizhou Sha | Liang Yu | Jesus Noel Villasenor | Thomas Henning | Zhuchang Zhan | M. Ikwut-Ukwa | D. Yahalomi | Mma Ikwut-Ukwa | Shelly Tsirulik | Patricia T Boyd | Aylin Garcia Soto | Pablo Lewin | Daniel A. Yahalomi | P. Rowden | G. Zhou | S. Tsirulik | N. E. Batalha | J. Villaseñor | L. Sha | Joseph E. Rodriguez

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