A dataset provided by the European Space Agency

Obs ID 1304403
Target/Line-of-sight HD67228
Gaia DR2 ID Gaia DR2 676768820148924416
URL https://cheops.unige.ch/archive_browser/?visit-id=1304403
DOI https://doi.org/10.5270/esa-hs59yeb
Author European Space Agency
Description of observation
  • Target RA (J2000): 121.941066 °
  • Target Dec (J2000): 21.58181 °
  • Gaia GMag: 5.09

  • Programme ID: CH_PR210015
  • PI of observing programme: Boisse
  • Title of programme: Is the Neptune-mass planet around the bright HD67228 transiting?
  • Abstract: HD67228 is a very bright star in the Northern sky with a V magnitude of 5.3. Thanks to SOPHIE measurements, we discovered a Neptune-mass planet around this star on a 10.1 days orbit. With a 9.1% of transit probability, we ask for CHEOPS to search for the transit of the planet since its host star is not plan to be observed by TESS. We ask for one visit of 46.7 h = 28 orbits in order to cover the uncertainty on the transit epoch. With a Neptune density, we expect a planetary radius of 3.85 Earth-radius, leading to a transit of 3.5 hours with 360 ppm. Whereas the error budget for this bright star with CHEOPS is of less than 18 ppm, the transit should be easily detectable within one visit (even taking into account the 45% interruption). If detected, it will be the brightest system with a small-mass planet with mass and radius accurately measured.
Temporal Coverage 2020-12-11T07:42:00Z / 2020-12-13T05:48:00Z
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 2024-04-23T18:42:56Z
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, Hd67228, 3.0, European Space Agency, https://doi.org/10.5270/esa-hs59yeb