A dataset provided by the European Space Agency

Obs ID 2048563
Target/Line-of-sight TOI-663 d
Gaia DR2 ID Gaia DR2 3762515188088861184
URL https://cheops.unige.ch/archive_browser/?visit-id=2048563
DOI https://doi.org/10.57780/esa-lbeturh
Author European Space Agency
Description of observation
  • Target RA (J2000): 160.066467 °
  • Target Dec (J2000): -8.51072 °
  • Gaia GMag: 12.8

  • Programme ID: CH_PR230035
  • PI of observing programme: Merin
  • Title of programme: Dynamical masses and bulk compositions of newly-found TESS and ASTEP-confirmed sub-Neptunes
  • Abstract: The Sub-Neptunes recently detected by the TESS, Kepler and K2 surveys, continue to challenge our understanding of planetary systems, in particular in relationship to the radius valley. Their physical nature also constitutes a mystery with their bulk compositions still allowing them to be either rocky, water worlds or gas-giants (e.g. Rogers and Seager 2010), possibly in connection to photoevaporation of their initial atmospheres as they migrate towards the stars (e.g. Owens and Wu, 2013) or due to core-powered mass-loss (e.g. Rogers et al. 2021). We request high-quality CHEOPS observations to dynamically determine the planet masses and radii via transit timing variation (TTV) measurements, to identify prime targets for atmospheric follow-up characterisation with JWST, to put constraints on their formation histories and to search for further non-transiting and still undetected long-period planets via the TTVs. The five planets are the unique best targets for this science case in CHEOPS AO-03 to our knowledge (observable both by CHEOPS and ASTEP, not observed by CHEOPS yet and not in the CHEOPS Reserved Target List).
Temporal Coverage 2023-04-18T04:21:56Z / 2023-04-18T16:02:00Z
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 2024-12-17T11:34:03Z
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, 'TOI-663 d', 3.0, European Space Agency, https://doi.org/10.57780/esa-lbeturh