Planet Hunters TESS. V. A Planetary System Around a Binary Star, Including a Mini-Neptune in the Habitable Zone
Hogg, David W.; Aigrain, Suzanne; Bedell, Megan; Stassun, Keivan G.; Saunders, Nicholas; Howell, Steve B.; Chontos, Ashley; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Shporer, Avi; Ciardi, David R.; Clark, Catherine A.; Giacalone, Steven; Tanner, Christopher; Grunblatt, Samuel K.; Martioli, Eder; Delfosse, Xavier; Polanski, Alex S.; Beard, Corey; Holcomb, Rae; Lubin, Jack; Brinkman, Casey L.; Tyler, Dakotah; Van Zandt, Judah; Klein, Baptiste; Gilbert, Emily A.; Eisner, Nora L.; Murphy, Joseph M. Akana; Barragán, Oscar; Johnston, Cole; Bosch, Milton K. D.; Lintott, Chris; Kiefer, Flavien; Huten, Marc; Boyle, Andrew W.; Heidari, Neda; Llama, Joe; Zhao, Lily L.; Hebrard, Guillaume; Stiller, Lisa; Faridani, Thea H.; Mason, Ian R.; Cortes-Zuleta, Pia; Alhassan, Safaa; Amratlal, Daval J.; Antonel, Lais I.; Bentzen, Simon L. S.; Bundy, David; Chitsiga, Itayi; Delaunay, Jérôme F.; Doisy, Xavier; Ferstenou, Richard; Fynø, Mark; Geary, James M.; Haynaly, Gerry; Hermes, Pete; Lee, Sam; Metcalfe, Paul; Pennell, Garry J.; Puszkarska, Joanna; Schäfer, Thomas; Tarr, Allan; Wilkinson, Andrew
United States, United Kingdom, Netherlands, France, Brazil
Abstract
We report on the discovery and validation of a transiting long-period mini-Neptune orbiting a bright (V = 9.0 mag) G dwarf (TOI 4633; R = 1.05 R ⊙, M = 1.10 M ⊙). The planet was identified in data from the Transiting Exoplanet Survey Satellite by citizen scientists taking part in the Planet Hunters TESS project. Modelling of the transit events yields an orbital period of 271.9445 ± 0.0040 days and radius of 3.2 ± 0.20 R ⊕. The Earth-like orbital period and an incident flux of