Three planets of Kepler-30 were detected by thetransit method in 2011.[7] The planets are strongly interacting each other, with transit times variability exceeding one hour for each consecutive orbit.[8] Due to the irregularity of orbits, confirmation of the planetary system was delayed until 2012.[9] The planetary periods are close to 1:2:5orbital resonance but are not resonant, producing an extremely complex orbital dynamics.[10]
^Sanchis-Ojeda, Roberto; Fabrycky, Daniel C.; Winn, Joshua N.; Barclay, Thomas; Clarke, Bruce D.; Ford, Eric B.; Fortney, Jonathan J.; Geary, John C.; Holman, Matthew J.; Howard, Andrew W.; Jenkins, Jon M.; Koch, David; Lissauer, Jack J.; Marcy, Geoffrey W.; Mullally, Fergal; Ragozzine, Darin; Seader, Shawn E.; Still, Martin; Thompson, Susan E. (2012), "Alignment of the stellar spin with the orbits of a three-planet system",Nature,487 (7408):449–453,arXiv:1207.5804,Bibcode:2012Natur.487..449S,doi:10.1038/nature11301,PMID22836999,S2CID685995
^Tingley, B.; Palle, E.; Parviainen, H.; Deeg, H. J.; Zapatero Osorio, M. R.; Cabrera-Lavers, A.; Belmonte, J. A.; Rodriguez, P. M.; Murgas, F.; Ribas, I. (2011), "Detection of transit timing variations in excess of one hour in the Kepler multi-planet candidate system KOI 806 with the GTC",Astronomy & Astrophysics,536: L9,arXiv:1111.5107,Bibcode:2011A&A...536L...9T,doi:10.1051/0004-6361/201118264,S2CID119226419
^Fabrycky, Daniel C.; Ford, Eric B.; Steffen, Jason H.; Rowe, Jason F.; Carter, Joshua A.; Moorhead, Althea V.; Batalha, Natalie M.; Borucki, William J.; Bryson, Steve; Buchhave, Lars A.; Christiansen, Jessie L.; Ciardi, David R.; Cochran, William D.; Endl, Michael; Fanelli, Michael N.; Fischer, Debra; Fressin, Francois; Geary, John; Haas, Michael R.; Hall, Jennifer R.; Holman, Matthew J.; Jenkins, Jon M.; Koch, David G.; Latham, David W.; Li, Jie; Lissauer, Jack J.; Lucas, Philip; Marcy, Geoffrey W.; Mazeh, Tsevi; et al. (2012), "TRANSIT TIMING OBSERVATIONS FROM Kepler : IV. CONFIRMATION OF 4 MULTIPLE PLANET SYSTEMS BY SIMPLE PHYSICAL MODELS",The Astrophysical Journal,750 (2): 114,arXiv:1201.5415,Bibcode:2012ApJ...750..114F,doi:10.1088/0004-637X/750/2/114,S2CID9075167
