+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   21084 (1991 UV3) Classification: Main-belt Asteroid          SPK-ID: 2021084 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO193859 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1714194 n/a   a 2.7259651 n/a AU q 2.2586818 n/a AU i 8.80616 n/a deg node 237.64977 n/a deg peri 224.85163 n/a deg M 228.67741 n/a deg tp 2457000.1747883 (2014-Dec-08.67478830) n/a JED period 1643.9130830 4.50 n/a n/a d yr n 0.21898968 n/a deg/d Q 3.1932484 n/a AU   Orbit Determination Parameters    # obs. used (total)      461      first obs. used      1991-??-??      last obs. used      2011-03-13      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.318  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.7 mag n/a PDS3 (MPO 8637)   21084 (1991 UV3)          Discovered 1991-Oct-31 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 UV3 = 1998 KV27  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-18 07:31 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin