^Huber, Daniel; Bryson, Stephen T.; Haas, Michael R.; Barclay, Thomas; Barentsen, Geert; Howell, Steve B.; Sharma, Sanjib; Stello, Dennis; Thompson, Susan E. Thek2Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1–8. The Astrophysical Journal Supplement Series. 2016, 224 (1): 2. Bibcode:2016ApJS..224....2H. S2CID 118621218. arXiv:1512.02643. doi:10.3847/0067-0049/224/1/2.
^ 4.04.14.2Johnson, Michele. Johnson, Michele , 编. A Sunny Outlook for NASA Kepler's Second Light. NASA Official: Brian Dunbar; Image credits: NASA Ames; NASA Ames/W Stenzel. NASA. November 25, 2013 [December 12, 2013]. (原始内容存档于April 18, 2014).
^ 5.05.15.2Johnson, Michele. Johnson, Michele , 编. Kepler's Second Light: How K2 Will Work. NASA Official: Brian Dunbar; Image credit: NASA Ames/W Stenzel. NASA. December 11, 2013 [December 12, 2013]. (原始内容存档于April 18, 2014).