+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   21253 (1996 AX3) Classification: Main-belt Asteroid          SPK-ID: 2021253 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO257019 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0751679 n/a   a 2.6563217 n/a AU q 2.4566516 n/a AU i 5.32427 n/a deg node 331.81165 n/a deg peri 267.29262 n/a deg M 252.49829 n/a deg tp 2456872.7068727 (2014-Aug-03.20687270) n/a JED period 1581.3187918 4.33 n/a n/a d yr n 0.22765808 n/a deg/d Q 2.8559918 n/a AU   Orbit Determination Parameters    # obs. used (total)      857      first obs. used      1995-??-??      last obs. used      2013-03-03      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.52      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.378  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.4 mag n/a PDS3 (MPO 8689)   21253 (1996 AX3)          Discovered 1996-Jan-13 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 15:43 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin