New most photometry of the 55 cancri system

Diana Dragomir, Jaymie M. Matthews, Joshua N. Winn, Jason F. Rowe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

11 Scopus citations


Since the discovery of its transiting nature, the super-Earth 55 Cnc e has become one of the most enthusiastically studied exoplanets, having been observed spectroscopically and photometrically, in the ultraviolet, optical and infrared regimes. To this rapidly growing data set, we contribute 42 days of new, nearly continuous MOST photometry of the 55 Cnc system. Our analysis of these observations together with the discovery photometry obtained in 2011 allows us to determine the planetary radius (1.990+0.084 -0.080) and orbital period (0.7365417+0.0000025 -0.0000028) of 55 Cnc e with unprecedented precision. We also followed up on the out-of-transit phase variation first observed in the 2011 photometry, and set an upper limit on the depth of the planet's secondary eclipse, leading to an upper limit on its geometric albedo of 0.6.

Original languageEnglish (US)
Title of host publicationFormation, Detection, and Characterization of Extrasolar Habitable Planets
PublisherCambridge University Press
Number of pages6
ISBN (Print)9781107033825
StatePublished - Aug 2012
Externally publishedYes

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


  • binaries
  • planetary systems
  • stars: individual (55 Cnc)
  • techniques: photometric


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