168 Sibylla

Outer main-belt asteroid October 2019 yes #D6D6D6 168 Sibylla.png Lightcurve-based 3D model of 168 Sibylla 168 Sibylla https://www.minorplanetcenter.net/iau/lists/NumberedMPs000001.html Discovery Circumstances: Numbered Minor Planets (1)-(5000) August 14, 2012 J. C. Watson 28 September 1876 Ann Arbor (168) Sibylla main-belt A876 SA; 1911 HF;1949 MO s ᵻ ' b ɪ l əSibylla Sibyllian s ᵻ ' b ɪ l i ə n http://ftp.lowell.edu/pub/elgb/astorb.html astorb The Asteroid Orbital Elements Database Lowell Observatory August 14, 2012 31 July 2016 (JD 2457600.5) 3.6215 AU Gm on on 3.1417 AU Gm on 3.3816 AU Gm on 0.070943 6.22 yr (2271.4 d) 16.19 km/s 4.6617° 205.959° 171.517° 173.920° 148.39 4.0 km149.06 ± 4.29 km (3.92 ± 1.80) × 1018 kg 2.26 ± 1.05 g/cm3 23.82 hours 0.0535 0.003 C 7.94 0.15849 ms / day 136.01 yr (49676 d) 0 47.009 h d on on Sibyls 168 Sibylla is a large main-belt asteroid, discovered by Canadian-American astronomer J. C. Watson on September 28, 1876. It was most likely named for the Sibyls, referring to the Ancient Greek female oracles. Based upon its spectrum this object is classified as a C-type asteroid, which indicates it is very dark and composed of primitive carbonaceous materials. 168 Sibylla is a Cybele asteroid, orbiting beyond most of the main-belt asteroids. Photometric observations of this asteroid made at the Torino Observatory in Italy during 1990–1991 were used to determine a synodic rotation period of 23.82 ± 0.004 hours. The shape of this slowly rotating object appears to resemble an oblate spheroid. References Dictionary of Minor Planet Names 1 Physics and astronomy online library Lutz Schmadel . Springer Science & Business Media 2003 9783540002383 30 https://books.google.com/books?id=VoJ5nUyIzCsC&pg=PA30 . Studies for slowly rotating asteroids (168) Sibylla and (346) Hermentaria Wang Xiaobin Muinonen Karri Han Xianming L. Kwok Chi-Tai Asteroids: New Observations, New Models, Proceedings of the International Astronomical Union, IAU Symposium 1 318 185–192 January 2016 10.1017/S1743921315008777 2016IAUS..318..185W free 10138/224965 free Donald K. Yeomans 168 Sibylla JPL Small-Body Database Browser NASA Jet Propulsion Laboratory https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=168 12 May 2016 . B. Carry Density of asteroids Planetary and Space Science 73 98–118 December 2012 1 10.1016/j.pss.2012.03.009 2012P&SS...73...98C . 1203.4336 119226456 See Table 1. di Martino M. Blanco C. Riccioli D. de Sanctis G. 1 Lightcurves and rotational periods of nine main belt asteroids Icarus 107 2 269–275 February 1994 10.1006/icar.1994.1022 1994Icar..107..269D . External links 168 167 Urda 168 169 Zelia Category:Cybele asteroids Sibylla Sibylla Category:C-type asteroids (Tholen) Category:Ch-type asteroids (SMASS) 18760928