+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23845 (1998 RB) Classification: Main-belt Asteroid          SPK-ID: 2023845 [ 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 .01376895216593789 8.1841e-08   a 2.563868488095029 2.9487e-08 AU q 2.528566705522693 2.2477e-07 AU i 15.27663470028284 1.0961e-05 deg node 197.3497218956595 2.507e-05 deg peri 48.5988977110722 0.00041707 deg M 302.7987466105415 0.00041497 deg tp 2456638.756681261591 (2013-Dec-12.25668126) 0.0017291 JED period 1499.484717060059 4.11 2.5868e-05 7.082e-08 d yr n .2400824736018838 4.1418e-09 deg/d Q 2.599170270667364 2.9893e-08 AU   Orbit Determination Parameters    # obs. used (total)      639      data-arc span      9660 days (26.45 yr)      first obs. used      1986-11-02      last obs. used      2013-04-14      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .58159      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:36:46   Additional Information  Earth MOID = 1.53287 AU   T_jup = 3.384  [ 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 14.1 mag n/a PDS3 (MPO 11216)   23845 (1998 RB)          Discovered 1998-Sep-02 by Sugie, A. at Dynic (402) Reference: 20010408/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 12:26 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin