+ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .197092660857249 4.6899e-08   a 2.241856180574446 9.4482e-09 au q 1.800002780685759 1.0633e-07 au i 5.14535702028674 5.2467e-06 deg node 171.3981850254587 5.2024e-05 deg peri 133.4440711286974 5.42e-05 deg M 164.6993859520893 1.3433e-05 deg tp 2458439.581804040723 (2018-Nov-17.08180404) 4.4307e-05 TDB period 1226.055272629133 3.36 7.7508e-06 2.122e-08 d yr n .2936246089689105 1.8562e-09 deg/d Q 2.683709580463133 1.131e-08 au   Orbit Determination Parameters    # obs. used (total)      274      data-arc span      8886 days (24.33 yr)      first obs. used      1995-08-22      last obs. used      2019-12-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55807      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 22:14:00   Additional Information  Earth MOID = .78986 au   Jupiter MOID = 2.57281 au   T_jup = 3.603  [ hide covariance matrix ] Orbital Elements at Epoch 2456905.5 (2014-Sep-05.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1974129756806991 4.6848e-08   q 1.798710496779029 1.0619e-07 au tp 2457214.349483326834 (2015-Jul-10.84948333) 4.1958e-05 TDB node 171.4306330798575 5.1997e-05 deg peri 133.5497626146107 5.417e-05 deg i 5.14677756451368 5.249e-06 deg   Orbit Determination Parameters    # obs. used (total)      274      data-arc span      8886 days (24.33 yr)      first obs. used      1995-08-22      last obs. used      2019-12-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55807      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 22:14:00   Additional Information  Jupiter MOID = 2.57281 au   T_jup = 3.603  Orbit Covariance (6×6)   e q tp node peri i e 2.194764881079419E-15 -4.962293380810856E-15 1.642577303007402E-13 -3.500677080328554E-14 7.255327028724982E-14 -3.914877530832757E-15 q -4.962293380810856E-15 1.127590040507381E-14 -3.046610622774823E-13 7.99530899954301E-14 -1.490408805232491E-13 8.99975361934654E-15 tp 1.642577303007402E-13 -3.046610622774823E-13 1.76046927027294E-9 -2.583577815136664E-11 6.526509090395605E-10 3.148619337713134E-13 node -3.500677080328554E-14 7.99530899954301E-14 -2.583577815136664E-11 2.703697282085416E-9 -2.700491860077852E-9 -4.601441588595084E-11 peri 7.255327028724982E-14 -1.490408805232491E-13 6.526509090395605E-10 -2.700491860077852E-9 2.934442895626712E-9 4.604277004109596E-11 i -3.914877530832757E-15 8.99975361934654E-15 3.148619337713134E-13 -4.601441588595084E-11 4.604277004109596E-11 2.755196052088624E-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 ] 2021-Jan-26 19:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin