+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   8258 (1982 RW1) Classification: Main-belt Asteroid          SPK-ID: 2008258 [ 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 .1838411127409511 7.139e-08   a 2.314558703827084 1.2395e-08 AU q 1.889047656211259 1.6581e-07 AU i 5.090482004753206 7.6389e-06 deg node 11.18666985384775 7.2894e-05 deg peri 343.4420036421568 7.46e-05 deg M 247.0813780663701 2.1795e-05 deg tp 2456803.925917858168 (2014-May-26.42591786) 7.9693e-05 JED period 1286.176964808375 3.52 1.0332e-05 2.829e-08 d yr n .2798992750221085 2.2484e-09 deg/d Q 2.740069751442908 1.4674e-08 AU   Orbit Determination Parameters    # obs. used (total)      913      data-arc span      21329 days (58.40 yr)      first obs. used      1954-11-23      last obs. used      2013-04-16      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .56648      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:30:22   Additional Information  Earth MOID = .884641 AU   T_jup = 3.554  [ 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 14.8 mag n/a PDS3 (MPC 31209)   8258 (1982 RW1)          Discovered 1982-Sep-15 by Mrkos, A. at Klet Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1982 RW1 = 1989 TZ13  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 19:06 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin