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Beyond Jupiter - The World of Distant Minor Planets : (52975) Cyllarus
JOA 2026, Vol. 16, No. 3, Page 34 Author(s): M. O’ConnellAbstract: (52975) Cyllarus is a Centaur object discovered in 1998 by the SPACEWATCH® program at Kitt Peak Observatory. With a period of 134 years, it follows a highly eccentric (e = 0.377) and moderately inclined orbit (12.6°), placing it in the vicinity of both Uranus and Neptune. (52975) Cyllarus exhibits a very red surface (B-R= 1.81), indicative of complex organic materials common among primitive outer solar system bodies, and has an estimated diameter of ~56 km. Its rotation, shape, and activity remain unknown, and no stellar occultations have yet been observed, though a potential event is predicted for 2031, highlighting the need for improved astrometry