+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   22522 (1998 EF6) Classification: Main-belt Asteroid          SPK-ID: 2022522 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO236509 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2508978 n/a   a 2.2984477 n/a AU q 1.7217722 n/a AU i 20.82027 n/a deg node 322.46883 n/a deg peri 279.42624 n/a deg M 64.38810 n/a deg tp 2456172.8574298 (2012-Sep-02.35742980) n/a JED period 1272.7712926 3.48 n/a n/a d yr n 0.28284736 n/a deg/d Q 2.8751232 n/a AU   Orbit Determination Parameters    # obs. used (total)      386      first obs. used      1977-??-??      last obs. used      2012-08-13      # oppositions      11      planetary ephem.      DE403      condition code      0      fit RMS      0.52      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.467  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.5 mag n/a PDS3 (MPO 10023)   22522 (1998 EF6)          Discovered 1998-Mar-02 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905) Reference: 20010309/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1998 EF6 = 1977 CT = 1991 CP4  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 10:24 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin