+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   13040 (1990 OB4) Classification: Main-belt Asteroid          SPK-ID: 2013040 [ 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 .2453404789058569 9.9374e-08   a 2.649137986764685 2.7446e-08 AU q 1.99919720440414 2.5754e-07 AU i 11.49845666451212 1.1043e-05 deg node 271.4476009610933 4.5521e-05 deg peri 85.11737044693999 5.121e-05 deg M 75.51558124941421 2.4146e-05 deg tp 2456070.138548270783 (2012-May-22.63854827) 0.00010337 JED period 1574.908391815375 4.31 2.4475e-05 6.701e-08 d yr n .228584723956568 3.5524e-09 deg/d Q 3.29907876912523 3.418e-08 AU   Orbit Determination Parameters    # obs. used (total)      555      data-arc span      8288 days (22.69 yr)      first obs. used      1990-07-26      last obs. used      2013-04-04      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .5413      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:51:03   Additional Information  Earth MOID = 1.03347 AU   T_jup = 3.320  [ 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 13.8 mag n/a PDS3 (MPC 37497)   13040 (1990 OB4)          Discovered 1990-Jul-29 by Holt, H. E. at Palomar (675) Reference: 20000124/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-26 03:10 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin