+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2018 CB) Classification: Apollo [NEO]          SPK-ID: 3798991 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3197657055129215 8.9088e-07   a 1.408136318164353 2.3578e-06 au q .9578626149281609 3.5442e-07 au i 5.303379180103087 5.1116e-06 deg node 320.7539363483741 3.4438e-06 deg peri 208.1069255876737 0.00021017 deg M 240.0759246579179 0.001403 deg tp 2459403.814968900678 (2021-Jul-08.31496890) 0.0028892 TDB period 610.3310665140498 1.67 0.0015329 4.197e-06 d yr n .5898438073227472 1.4815e-06 deg/d Q 1.858410021400545 3.1118e-06 au   Orbit Determination Parameters    # obs. used (total)      206      # delay obs. used      0      # Doppler obs. used      4      data-arc span      5 days      first obs. used      2018-02-04      last obs. used      2018-02-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      2      norm. resid. RMS      .24497      source      ORB      producer      Otto Matic      solution date      2020-Nov-03 14:23:36   Additional Information  Earth MOID = .000491721 au   Jupiter MOID = 3.11796 au   T_jup = 4.677  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 25.9   n/a MPO435629   [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-11 19:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin