A dataset provided by the European Space Agency

Obs ID 1253194
Target/Line-of-sight K2-138
Gaia DR2 ID Gaia DR2 2413596935442139520
URL https://cheops.unige.ch/archive_browser/?visit-id=1253194
DOI https://doi.org/10.5270/esa-6szmheo
Author European Space Agency
Description of observation
  • Target RA (J2000): 348.949036 °
  • Target Dec (J2000): -10.84969 °
  • Gaia GMag: 12.025

  • Programme ID: CH_PR210017
  • PI of observing programme: Lopez
  • Title of programme: Measuring timing transit variations in the dynamically remarkable system K2-138
  • Abstract: Compact multiple systems of small transiting exoplanets show remarkable dynamics bringing new insights to the formation and evolution of exoplanets. Such a system was identified around K2-138 in the K2 C12 data. It harbours 6 planets in a chain of near 3:2 mean motion resonance. This is an ideal target to search for timing transit variations, allowing to further constrain the masses of the outer planets. Moreover, in addition to 215 HARPS radial velocities we already have, it would make K2-138 one of the very few systems with both RVs and TTVs, allowing to calibrate the two mass measurement techniques and understand multi-planet formation and dynamics.
Temporal Coverage 2020-10-04T02:57:00Z / 2020-10-04T11:44:00Z
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 2024-10-31T19:59:17Z
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, 'K2-138', 3.0, European Space Agency, https://doi.org/10.5270/esa-6szmheo