A dataset provided by the European Space Agency

Obs ID 2315860
Target/Line-of-sight TIC 434398831
Gaia DR2 ID Gaia DR2 3369841304767966976
URL https://cheops.unige.ch/archive_browser/?visit-id=2315860
DOI https://doi.org/10.57780/esa-69rr6uz
Author European Space Agency
Description of observation
  • Target RA (J2000): 93.959236 °
  • Target Dec (J2000): 16.02391 °
  • Gaia GMag: 11.78

  • Programme ID: CH_PR240002
  • PI of observing programme: Vach
  • Title of programme: CHEOPS transits of two 48-Myr mini-Neptunes in the Taurus-Orion II moving group
  • Abstract: Within the first 100 Myr, planets undergo critical evolutionary events. Observing young planetary systems allow us to gain insights into the physical processes that shape the mature planetary population. TIC 434398831 is a pre-main-seqeunce, Sun-like star (G7V, G = 11.7893) hosting two transiting mini-Neptunes. Gaia kinematics place TIC 434398831 in the 48-Myr Taurus-Orion II moving group. We identified two planetary candidates, TIC 434398831.01 (Rp = 3.65 Rearth, P = 3.61 days) and TIC 434398831.02 (Rp = 5.41 Rearth, P = 6.12 days), through an independent search for young planets located in known moving groups from the TESSs Full Frame Images (FFIs) light curves. We propose to use 4 visits of CHEOPS to observe two transits of both TIC 434398831.01 and TIC 434398831.02, which is necessary for the confirmation of this exemplar system, as high-precision, space-based photometry is needed to overcome the photometric modulations of the young star. Our CHEOPS observations will have the capability to anchor the optical transit depths of the two young planets, which will enable us to distinguish between different cloud and haze scenarios in future atmospheric observations.
Temporal Coverage 2024-01-09T02:28:52Z / 2024-01-09T10:43:00Z
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 2024-10-31T19:59:39Z
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 434398831', 3.0, European Space Agency, https://doi.org/10.57780/esa-69rr6uz