+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   268268 (2005 OJ18) Classification: Main-belt Asteroid          SPK-ID: 2268268 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1970926479130032 5.1663e-08   a 2.241856176244275 1.0027e-08 au q 1.80000280622817 1.1788e-07 au i 5.145360002240279 5.8591e-06 deg node 171.3981684598378 5.253e-05 deg peri 133.4440742475662 5.5675e-05 deg M 164.6993973928912 1.461e-05 deg tp 2458439.581766701811 (2018-Nov-17.08176670) 4.8882e-05 TDB period 1226.055269076923 3.36 8.2258e-06 2.252e-08 d yr n .2936246098196195 1.97e-09 deg/d Q 2.683709546260379 1.2004e-08 au   Orbit Determination Parameters    # obs. used (total)      259      data-arc span      8307 days (22.74 yr)      first obs. used      1995-08-22      last obs. used      2018-05-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55965      source      ORB      producer      Otto Matic      solution date      2018-May-31 17:00:14   Additional Information  Earth MOID = .78986 au   Jupiter MOID = 2.57281 au   T_jup = 3.603  [ hide covariance matrix ] Orbital Elements at Epoch 2456692.5 (2014-Feb-04.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1971229737037631 5.1643e-08   q 1.799856994579883 1.1784e-07 au tp 2457214.395306348227 (2015-Jul-10.89530635) 4.7985e-05 TDB node 171.4337472972353 5.2516e-05 deg peri 133.4980441418117 5.5671e-05 deg i 5.145561957778853 5.8605e-06 deg   Orbit Determination Parameters    # obs. used (total)      259      data-arc span      8307 days (22.74 yr)      first obs. used      1995-08-22      last obs. used      2018-05-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55965      source      ORB      producer      Otto Matic      solution date      2018-May-31 17:00:14   Additional Information  Jupiter MOID = 2.57281 au   T_jup = 3.603  Orbit Covariance (6×6)   e q tp node peri i e 2.667007457624537E-15 -6.07187540638018E-15 6.661428436139659E-13 -4.330820561307492E-14 2.945735831347033E-13 -6.284256211782825E-15 q -6.07187540638018E-15 1.388521863777447E-14 -1.493855184320011E-12 9.91124632826412E-14 -6.744805076698775E-13 1.443337568542313E-14 tp 6.661428436139659E-13 -1.493855184320011E-12 2.302586390249599E-9 -4.14043770921335E-11 8.985560971584655E-10 8.673234395133064E-13 node -4.330820561307492E-14 9.91124632826412E-14 -4.14043770921335E-11 2.757947343952994E-9 -2.761014504429666E-9 -5.980515165051508E-11 peri 2.945735831347033E-13 -6.744805076698775E-13 8.985560971584655E-10 -2.761014504429666E-9 3.099206245276491E-9 5.998121933486635E-11 i -6.284256211782825E-15 1.443337568542313E-14 8.673234395133064E-13 -5.980515165051508E-11 5.998121933486635E-11 3.434560479404197E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 17.2   n/a MPO450150   268268 (2005 OJ18)          Discovered 2005-Jul-30 by NEAT at Palomar Reference: 20110319/Numbers.arc Last Updated: 2011-03-23 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 11:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin