A dataset provided by the European Space Agency

Obs ID 1939449
Target/Line-of-sight TIC 176797879
Gaia DR2 ID Gaia DR2 5048222066283198208
URL https://cheops.unige.ch/archive_browser/?visit-id=1939449
DOI https://doi.org/10.57780/esa-fh20xhx
Author European Space Agency
Description of observation
  • Target RA (J2000): 48.582321 °
  • Target Dec (J2000): -34.03414 °
  • Gaia GMag: 11.412

  • Programme ID: CH_PR430014
  • PI of observing programme: Scarsdale
  • Title of programme: Period Measurement of The Brightest-Host Transiting Habitable Zone Terrestrial Exoplanet
  • Abstract: We propose to use CHEOPS photometry to measure the period of the Transiting Exoplanet Survey Satellite (TESS) planet candidate TOI4353.01 (TIC176797879), initially a duo-transit object that we confirmed with a transit detection in our AO3 program (ID 24). This object is a terrestrial-size exoplanet with two transits separated by 718 days in the TESS photometry, and a third detected in AO3 at the same separation. Based on the transit duration and a priori likelihood of transit, the true period is very unlikely to be 718 days, and instead is more likely to be one of the fractions in the range 25-60 days. This planet is therefore a likely-terrestrial planet candidate with a strong probability of being in the optimistic habitable zone (OHZ) and potential for future mass measurement and even transmission spectroscopy thanks to its bright (for an M star) host. Because of the great rarity of terrestrial OHZ exoplanets and the difficulty of discovering more with TESS due to its short sectors, followup of candidates like this one is of critical importance, and this followup must begin with a period measurement, as we propose to do here.
Temporal Coverage 2022-11-08T06:02:00Z / 2022-11-08T14:16:00Z
Version 3.0
Mission Description CHEOPS (Benz et al., https://doi.org/10.1007/s10686-020-09679-4) is a European Space Agency (ESA) mission in partnership with Switzerland with important contributions to the payload and the ground segment from Austria, Belgium, France, Germany, Hungary, Italy, Portugal, Spain, Sweden and the United Kingdom.

The satellite has a single payload comprising an ultra-high precision photometer covering the 330 - 1100 nm wavelength range in a single photometric band. Observations are made as part of the Guaranteed Time Observing Programme that is formulated by the CHEOPS Science Team, and the Guest Observers Programme through which the Community at large can apply for CHEOPS time.
Creator Contact https://www.cosmos.esa.int/web/cheops/contact
Date Published 2024-12-17T11:33:58Z
Keywords CHEOPS, EXOPLANETS, wide-band photometer
Acknowledgements https://www.cosmos.esa.int/web/cheops-guest-observers-programme/publication-guidelines
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2024, 'TIC 176797879', 3.0, European Space Agency, https://doi.org/10.57780/esa-fh20xhx