+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   4415 Echnaton (4237 P-L) Classification: Main-belt Asteroid          SPK-ID: 2004415 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250248 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0644217 n/a   a 2.3382007 n/a AU q 2.1875698 n/a AU i 2.01301 n/a deg node 329.01366 n/a deg peri 175.38794 n/a deg M 120.22636 n/a deg tp 2455964.3676616 (2012-Feb-06.86766160) n/a JED period 1305.9335891 3.58 n/a n/a d yr n 0.27566486 n/a deg/d Q 2.4888316 n/a AU   Orbit Determination Parameters    # obs. used (total)      643      first obs. used      1950-??-??      last obs. used      2012-06-14      # oppositions      17      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.562  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.2 mag n/a PDS3 (MPC 28111)   4415 Echnaton (4237 P-L)          Discovered 1960-Sep-24 by van Houten and Gehrels at Palomar (675) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  4237 P-L = 1980 FK3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-20 10:45 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin