Two transiting planets have been identified orbiting K2 target EPIC 220674823, or an alternative name, K2-106. One object is an ultra-short-period planet (USP) with an orbital period of just 0.57 days (13.7 hours), while the other has a period of 13.3 days. Both planets are small, with the former having a radius of Rp1 = 1.5 R⊕ and the latter Rp2 = 2.5 R⊕. Follow-up observations, including radial velocity (with uncertainties of 110 ms −1 ) and high-resolution adaptive optics imagery, show no signs of stellar companions. EPIC 220674823 is the 12th confirmed or validated planetary system in which an ultra-short-period planet (i.e., having an orbital period less than 1 day) is accompanied by at least one additional planet, suggesting that such systems may be common and must be accounted for in models for the formation and evolution of such extreme systems.
For more information about EPIC 220674823, please visit the ExoKyoto database:
http://www.exoplanetkyoto.org/exohtml/EPIC_220674823.html
For more information about the exoplanets orbiting EPIC 220674823, please visit the following pages:
http://www.exoplanetkyoto.org/exohtml/K2-106_b.html
http://www.exoplanetkyoto.org/exohtml/K2-106_c.html
Journal Articles
1.) ULTRA SHORT PERIOD PLANETS IN K2 WITH COMPANIONS: A DOUBLE TRANSITING SYSTEM FOR EPIC 220674823
WEB Articles
1.) EPIC 220674823
http://www.openexoplanetcatalogue.com/planet/EPIC%20220674823%20b/
