(471325) 2011 KT19

(471325) 2011 KT19, nicknamed Niku (/niːkuː/), is a trans-Neptunian object whose orbit is tilted 110° with respect to the planets' orbital plane. Thus, it has a nearly polar retrograde orbit around the Sun.

(471325) 2011 KT19
Discovery
Discovered byMount Lemmon Srvy.
List
    • Ying-Tung Chen
    • Hsing Wen Lin
    • Matthew J. Holman
    • Matthew J. Payne
    • Wesley C. Fraser
    • Pedro Lacerda
    • Wing-Huen Ip
    • Wen-Ping Chen
    • Rolf-Peter Kudritzki
    • Robert Jedicke
    • Richard J. Wainscoat
    • John L. Tonry
    • Eugene A. Magnier
    • Christopher Waters
    • Nick Kaiser
    • Shiang-Yu Wang
    • Matthew Lehner
Discovery siteMount Lemmon Obs.
Discovery date31 May 2011
Designations
Pronunciation/ˈniːkuː/
Named after
A Chinese adjective meaning "rebellious"
Alternative designations
Niku
Minor planet category
TNO · centaur
damocloid
Orbital characteristics
Epoch JD 2457600.5
Uncertainty parameter 2
Observation arc1779 days (4.87 yr)
Aphelion47.427 AU
Perihelion23.7805 AU
Semi-major axis
35.604 AU
Eccentricity0.33208
Orbital period (sidereal)
212.45 years
Mean anomaly
29.487°
Inclination110.1537°
Longitude of ascending node
243.77772°
322.174°
TJupiter−1.552
Physical characteristics
Mean diameter
75–250 km
161 km
22
7.2

    While the object has not received a formal name, it received the moniker "Niku" (逆骨), meaning "rebellious" in the Chinese language, by its discoverers.

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