ケプラー18
1 2 3 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051。 Gaia Data Release 2 catalog entry
1 2 3 4 5 6 Cochran, William D. et al. (2011). “Kepler 18-b, c, and d: A System Of Three Planets Confirmed by Transit Timing Variations, Lightcurve Validation, Spitzer Photometry and Radial Velocity Measurements”. The Astrophysical Journal Supplement Series 197: 7. arXiv:1110.0820. Bibcode: 2011ApJS..197....7C. doi:10.1088/0067-0049/197/1/7.
↑ "Kepler-18". SIMBAD. Centre de données astronomiques de Strasbourg. 2018年1月25日閲覧。