+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   24714 (1991 RT9) Classification: Main-belt Asteroid          SPK-ID: 2024714 [ 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 .223993693924534 9.1595e-08   a 2.38516140837814 2.84e-08 AU q 1.850900293909276 2.1248e-07 AU i 1.632746703529424 7.8895e-06 deg node 314.4800449302506 0.00027638 deg peri 23.31185977176923 0.00027674 deg M 323.9163788990051 3.2566e-05 deg tp 2456535.359858846266 (2013-Aug-30.85985885) 0.00012378 JED period 1345.473311804534 3.68 2.4031e-05 6.579e-08 d yr n .2675638355971342 4.7788e-09 deg/d Q 2.919422522847004 3.4761e-08 AU   Orbit Determination Parameters    # obs. used (total)      622      data-arc span      11866 days (32.49 yr)      first obs. used      1980-10-10      last obs. used      2013-04-06      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .56105      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:39:11   Additional Information  Earth MOID = .841511 AU   T_jup = 3.501  [ 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 14.6 mag n/a PDS3 (MPO 12383)   24714 (1991 RT9)          Discovered 1991-Sep-10 by Holt, H. E. at Palomar (675) Reference: 20010606/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RT9 = 1980 TB8 = 2000 AF158  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 18:01 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin