+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   29178 (1990 RW8) Classification: Main-belt Asteroid          SPK-ID: 2029178 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO247600 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1949311 n/a   a 2.3153027 n/a AU q 1.8639782 n/a AU i 6.70275 n/a deg node 283.70814 n/a deg peri 28.81487 n/a deg M 168.44045 n/a deg tp 2455798.4203142 (2011-Aug-24.92031420) n/a JED period 1286.7971255 3.52 n/a n/a d yr n 0.27976438 n/a deg/d Q 2.7666272 n/a AU   Orbit Determination Parameters    # obs. used (total)      490      first obs. used      1990-??-??      last obs. used      2012-12-08      # oppositions      14      planetary ephem.      DE403      condition code      0      fit RMS      0.51      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.547  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.0 mag n/a PDS3 (MPO 16203)   29178 (1990 RW8)          Discovered 1990-Sep-13 by Holt, H. E. at Palomar (675) Reference: 20011002/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 RW8 = 1996 ED12  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 03:25 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin