Triple star system in the constellation Cygnus
Kepler-1658 is atriple star system located in the constellationCygnus .[ 1] parallax measurements by theGaia spacecraft ,[ 2] light-years (820parsecs ).
This is an hierarchical triple system whose primary is anF-type subgiant star with 1.45 times theSun's mass and 3.26 times theSun's radius .[ 8] astronomical units away from the primary, is aneclipsing binary whose components have an orbital period of 3.8 days: star B is probably aK-type dwarf with 0.8 times the Sun's mass, and star C ared dwarf with 0.19 times the mass of the Sun and 0.23 times the radius.[ 6]
In 2009, ahot Jupiter planet candidate (KOI-4.01, now known as Kepler-1658b) was identified around Kepler-1658 by theKepler space telescope via thetransit method . Initially ruled out as a false alarm, a 2019 study re-claimed its nature as a planet. This would be the first planet ever detected by Kepler.[ 4] Transiting Exoplanet Survey Satellite (TESS) data in 2022 showed that it is gradually spiraling into its star, with its orbit decaying.[ 10] false positive planet.[ 6] light travel time effect is responsible for the supposed orbital decay.[ 6]
^a b Roman, Nancy G. (1987)."Identification of a constellation from a position" .Publications of the Astronomical Society of the Pacific 99 (617): 695.Bibcode :1987PASP...99..695R .doi :10.1086/132034 Constellation record for this object atVizieR .^a b c d e Vallenari, A.; et al. (Gaia collaboration) (2023)."Gaia Data Release 3. Summary of the content and survey properties" .Astronomy and Astrophysics .674 : A1.arXiv :2208.00211 Bibcode :2023A&A...674A...1G .doi :10.1051/0004-6361/202243940 S2CID 244398875 . Gaia DR3 record for this source atVizieR .^ Zacharias, N.; Finch, C. T.; Girard, T. M.; Henden, A.; Bartlett, J. L.; Monet, D. G.; Zacharias, M. I. (2013-01-14). "The Fourth Us Naval Observatory CCD Astrograph Catalog (Ucac4)".The Astronomical Journal .145 (2): 44.arXiv :1212.6182 Bibcode :2013AJ....145...44Z .doi :10.1088/0004-6256/145/2/44 .ISSN 0004-6256 . ^a b Chontos, Ashley; Huber, Daniel; Latham, David W.; Bieryla, Allyson; Eylen, Vincent Van; Bedding, Timothy R.; Berger, Travis; Buchhave, Lars A.; Campante, Tiago L.; Chaplin, William J.; Colman, Isabel L.; Coughlin, Jeff L.; Davies, Guy; Hirano, Teruyuki; Howard, Andrew W. (2019)."The Curious Case of KOI 4: Confirming Kepler ' s First Exoplanet Detection" .The Astronomical Journal .157 (5): 192.arXiv :1903.01591 Bibcode :2019AJ....157..192C .doi :10.3847/1538-3881/ab0e8e ISSN 1538-3881 .S2CID 119240124 . ^ Su, Tianhao; Zhang, Li-yun; Long, Liu; Han, Xianming L.; Misra, Prabhakar; Meng, Gang; Pi, Qingfeng; Yang, ZiLu; Yang, Jiawei (2022-07-27)."Magnetic Activity and Physical Parameters of Exoplanet Host Stars Based on LAMOST DR7, TESS, Kepler, and K2 Surveys" .The Astrophysical Journal Supplement Series .261 (2): 26.Bibcode :2022ApJS..261...26S .doi :10.3847/1538-4365/ac7151 ISSN 0067-0049 . ^a b c d e f g h i j k Winn, Joshua N.; Stefánsson, Guđmundur (2025-12-01)."Orbital Decay Candidates Reconsidered: WASP-4 b Is Not Decaying and Kepler-1658 b Is Not a Planet" .The Planetary Science Journal .6 (12): 300.arXiv :2510.05229 doi :10.3847/PSJ/ae21db ISSN 2632-3338 . ^ Jönsson, Henrik; Holtzman, Jon A.; Prieto, Carlos Allende; Cunha, Katia; García-Hernández, D. A.; Hasselquist, Sten; Masseron, Thomas; Osorio, Yeisson; Shetrone, Matthew; Smith, Verne; Stringfellow, Guy S.; Bizyaev, Dmitry; Edvardsson, Bengt; Majewski, Steven R.; Mészáros, Szabolcs (2020-08-17)."APOGEE Data and Spectral Analysis from SDSS Data Release 16: Seven Years of Observations Including First Results from APOGEE-South" .The Astronomical Journal .160 (3): 120.arXiv :2007.05537 Bibcode :2020AJ....160..120J .doi :10.3847/1538-3881/aba592 ISSN 0004-6256 . ^a b Petigura, Erik A.; Rogers, James G.; Isaacson, Howard; Owen, James E.; Kraus, Adam L.; Winn, Joshua N.; MacDougall, Mason G.; Howard, Andrew W.; Fulton, Benjamin; Kosiarek, Molly R.; Weiss, Lauren M.; Behmard, Aida; Blunt, Sarah (April 2022)."The California-Kepler Survey. X. The Radius Gap as a Function of Stellar Mass, Metallicity, and Age" .The Astronomical Journal .163 (4): 179.arXiv :2201.10020 Bibcode :2022AJ....163..179P .doi :10.3847/1538-3881/ac51e3 ISSN 0004-6256 . ^ "Kepler-1658" .SIMBAD Centre de données astronomiques de Strasbourg .^ Vissapragada, Shreyas; Chontos, Ashley; Greklek-McKeon, Michael; Knutson, Heather A.; Dai, Fei; González, Jorge Pérez; Grunblatt, Sam; Huber, Daniel; Saunders, Nicholas (2022)."The Possible Tidal Demise of Kepler's First Planetary System" .The Astrophysical Journal Letters .941 (2): L31.arXiv :2212.09752 Bibcode :2022ApJ...941L..31V .doi :10.3847/2041-8213/aca47e ISSN 2041-8205 .S2CID 254875671 .
