+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   48449 (1991 EK4) Classification: Main-belt Asteroid          SPK-ID: 2048449 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07969603093353239 8.5491e-08   a 2.148302124668096 1.6313e-08 AU q 1.977090972085974 1.9131e-07 AU i 2.835961449254341 7.7259e-06 deg node 185.7799363778506 9.8028e-05 deg peri 38.22717745986301 0.00010575 deg M 312.9966223564518 4.2118e-05 deg tp 2456550.664761385349 (2013-Sep-15.16476139) 0.00013506 JED period 1150.11551954173 3.15 1.31e-05 3.587e-08 d yr n .3130120356461618 3.5653e-09 deg/d Q 2.319513277250218 1.7613e-08 AU   Orbit Determination Parameters    # obs. used (total)      819      data-arc span      8069 days (22.09 yr)      first obs. used      1991-03-12      last obs. used      2013-04-14      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .55908      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 16:17:26   Additional Information  Earth MOID = .96926 AU   T_jup = 3.702  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.888 mag .47597 1 autocmod 2.5c 48449 (1991 EK4)          Discovered 1991-Mar-12 by Debehogne, H. at La Silla (809) Reference: 20021120/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 EK4 = 1998 OF  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 12:51 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin