Since the discovery of Kepler-10 , the system has received considerable interest because it contains a small , rocky planet which orbits the star in less than a day .
The system ’ s parameters , announced by the Kepler team and subsequently used in further research , were based on only 5 months of data .
We have reanalyzed this system using the full span of 29 months of Kepler photometric data , and obtained improved information about its star and the planets .
A detailed asteroseismic analysis of the extended time series provides a significant improvement on the stellar parameters : Not only can we state that Kepler-10 is the oldest known rocky-planet-harboring system at 10.41 \pm 1.36 Gyr , but these parameters combined with improved planetary parameters from new transit fits gives us the radius of Kepler-10b to within just 125 km .
A new analysis of the full planetary phase curve leads to new estimates on the planetary temperature and albedo , which remain degenerate in the Kepler band .
Our modeling suggests that the flux level during the occultation is slightly lower than at the transit wings , which would imply that the nightside of this planet has a non-negligible temperature .