+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   18351 (1990 QN5) Classification: Main-belt Asteroid          SPK-ID: 2018351 [ 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 .1723021684892972 8.5904e-08   a 2.792336013826677 3.5836e-08 AU q 2.31121046349358 2.3822e-07 AU i 8.637218909702083 1.0132e-05 deg node 345.2136702423833 4.2239e-05 deg peri 40.13700800271769 4.8034e-05 deg M 271.8489711492679 2.5335e-05 deg tp 2456817.825409350743 (2014-Jun-09.32540935) 0.0001237 JED period 1704.315302101204 4.67 3.2809e-05 8.983e-08 d yr n .2112285206593907 4.0662e-09 deg/d Q 3.273461564159774 4.201e-08 AU   Orbit Determination Parameters    # obs. used (total)      914      data-arc span      8258 days (22.61 yr)      first obs. used      1990-08-22      last obs. used      2013-04-01      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .51213      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:18:39   Additional Information  Earth MOID = 1.32125 AU   T_jup = 3.290  [ 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 13.6 mag n/a PDS3 (MPO 5168)   18351 (1990 QN5)          Discovered 1990-Aug-29 by Holt, H. E. at Palomar (675) Reference: 20001111/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 QN5 = 1997 DV  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 01:40 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin