+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   6042 Cheshirecat (1990 WW2) Classification: Mars-crossing Asteroid          SPK-ID: 2006042 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO169576 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.4572735 n/a   a 3.0404046 n/a AU q 1.6501081 n/a AU i 15.87827 n/a deg node 88.62298 n/a deg peri 286.38109 n/a deg M 233.50936 n/a deg tp 2455880.8797628 (2011-Nov-15.37976280) n/a JED period 1936.4018920 5.30 n/a n/a d yr n 0.18591182 n/a deg/d Q 4.4307011 n/a AU   Orbit Determination Parameters    # obs. used (total)      549      first obs. used      1979-??-??      last obs. used      2009-05-14      # oppositions      16      planetary ephem.      DE403      quality code      0      fit RMS      0.61      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.019  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.3 mag n/a PDS3 (MPC 28114)   6042 Cheshirecat           Discovered 1990 Nov. 23 by A. Natori and T. Urata at the JCPM Yakiimo Station. Named for a cat appearing in Lewis Carroll's famous fairy tale Alice in Wonderland . Its unique characteristic is its laughing voice that lingers after the cat fades away. Name and citation proposed by T. Urata. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19990202/MPCPages.arc Last Updated: 2009-05-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2010-Feb-10 06:23 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin