+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   13364 (1998 UK20) Classification: Main-belt Asteroid          SPK-ID: 2013364 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250344 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1121752 n/a   a 2.7366050 n/a AU q 2.4296258 n/a AU i 15.09005 n/a deg node 21.05731 n/a deg peri 231.30224 n/a deg M 216.34925 n/a deg tp 2457060.3147191 (2015-Feb-06.81471910) n/a JED period 1653.5472240 4.53 n/a n/a d yr n 0.21771377 n/a deg/d Q 3.0435842 n/a AU   Orbit Determination Parameters    # obs. used (total)      801      first obs. used      1975-??-??      last obs. used      2013-01-20      # oppositions      15      planetary ephem.      DE403      condition code      0      fit RMS      0.48      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.293  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.4 mag n/a PDS3 (MPC 37586)   13364 (1998 UK20)          Discovered 1998-Oct-20 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 20000124/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1998 UK20 = 1975 WT1 = 1980 XM1 = 1991 CH3 = 1996 DE3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 01:37 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin