+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   118174 (1991 RO24) Classification: Mars-crossing Asteroid          SPK-ID: 2118174 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO240980 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.3066476 n/a   a 2.3191156 n/a AU q 1.6079644 n/a AU i 9.56510 n/a deg node 150.51033 n/a deg peri 179.50699 n/a deg M 51.58199 n/a deg tp 2456215.6678094 (2012-Oct-15.16780940) n/a JED period 1289.9771534 3.53 n/a n/a d yr n 0.27907471 n/a deg/d Q 3.0302668 n/a AU   Orbit Determination Parameters    # obs. used (total)      111      first obs. used      1991-??-??      last obs. used      2012-10-09      # oppositions      9      planetary ephem.      DE403      condition code      1      fit RMS      0.53      data source      MPC:mpu      producer      MPCLINUX   Additional Information  T_jup = 3.497  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.3 mag n/a MPO240980   118174 (1991 RO24)          Discovered 1991-Sep-12 by Holt, H. E. at Palomar (675) Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 Alternate Designations  1991 RO24 = 1998 PK  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-26 08:13 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin