+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   24690 (1990 QX5) Classification: Main-belt Asteroid          SPK-ID: 2024690 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO257040 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2680985 n/a   a 2.6726270 n/a AU q 1.9560997 n/a AU i 11.87216 n/a deg node 331.77536 n/a deg peri 70.18800 n/a deg M 25.36999 n/a deg tp 2456288.0333532 (2012-Dec-26.53335320) n/a JED period 1595.9010169 4.37 n/a n/a d yr n 0.22557790 n/a deg/d Q 3.3891543 n/a AU   Orbit Determination Parameters    # obs. used (total)      439      first obs. used      1990-??-??      last obs. used      2013-03-15      # oppositions      9      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.298  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.3 mag n/a PDS3 (MPO 12375)   24690 (1990 QX5)          Discovered 1990-Aug-29 by Holt, H. E. at Palomar (675) Reference: 20010606/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 QX5 = 1992 EN23  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 20:10 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin