HD 142527 is a binary star system in the constellation of Lupus.[7][8] The primary star belongs to the Herbig Ae/Be star class, while the companion, discovered in 2012, is a red dwarf star or accreting protoplanet[5] with a projected separation of less than 0.1″.[9] The system is notable for its circumbinary protoplanetary disk and its discovery has helped refine models of planet formation. The orbit of companion is strongly inclined to the circumbinary protoplanetary disk.[5]
HD 142527 is listed in the International Variable star index as a UX Orionis variable, with a visible-light magnitude ranging from 8.27 to 8.60.[10]
^Simon Casassus, Gerrit van der Plas, Sebastian Perez M, William R. F. Dent, Ed Fomalont, Janis Hagelberg, Antonio Hales, Andrés Jordán, Dimitri Mawet, Francois Ménard, Al Wootten, David Wilner, A. Meredith Hughes, Matthias R. Schreiber, Julien H. Girard, Barbara Ercolano, Hector Canovas, Pablo E. Román & Vachail Salinas,Flows of gas through a protoplanetary gap, Nature 493, 191–194 (10 January 2013) .
^Hunziker, S.; Schmid, H. M.; Ma, J.; Menard, F.; Avenhaus, H.; Boccaletti, A.; Beuzit, J. L.; Chauvin, G.; Dohlen, K.; Dominik, C.; Engler, N.; Ginski, C.; Gratton, R.; Henning, T.; Langlois, M.; Milli, J.; Mouillet, D.; Tschudi, C.; Van Holstein, R. G.; Vigan, A. (2021), "HD 142527: Quantitative disk polarimetry with SPHERE", Astronomy & Astrophysics, 648: A110, arXiv:2103.08462, Bibcode:2021A&A...648A.110H, doi:10.1051/0004-6361/202040166, S2CID232233697
^"NSV 20441". The International Variable Star Index. AAVSO. Retrieved 10 November 2022.