|Discovery date||February 12, 2013|
|Eccentricity||0.18 ± 0.05|
Kepler-68d is a gas giant with the minimum mass about the same as Jupiter. It is at least a jovian-mass planet orbiting 1.4 astronomical units from its parent star, Kepler-68, well within habitable zone of the star. It was detected by radial velocity.
After planets Kepler-68b and c were detected by observing planetary transits in front of its star, doppler spectroscopy measurements were used to make follow-up observations of the star. Kepler-68d was discovered using that method.
- "Kepler Discoveries". kepler.nasa.gov. Retrieved February 26, 2013.
- Three Planets, One With a Density Between That of Earth and Ice Giants: Ronald L. Gilliland, Geoffrey W. Marcy, Jason F. Rowe, Leslie Rogers, Guillermo Torres, Francois Fressin, Eric D. Lopez, Lars A. Buchhave, Joergen Christensen-Dalsgaard, Jean-Michel Desert, Howard Isaacson, Jon M. Jenkins, Jack L. Lissauer, William J. Chaplin, Sarbani Basu, Travis S. Metcalfe, Yvonne Elsworth, Rasmus Handberg, Saskia Hekker, Daniel Huber, Christoffer Karoff, Hans Kjeldsen, Mikkel N. Lund, Mia Lundkvist, Andrea Miglio, David Charbonneau, Eric B. Ford, Jonathan J. Fortney, Michael R. Haas, Andrew W. Howard, Steve B. Howell, Darin Ragozzine, Susan E. Thompson
- Exoplanet. "Planet Kepler-68 d". Exoplanet.eu. Retrieved 28 February 2013.
- Table of confirmed planets at NASA, Kepler mission