+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3196035217401896 8.8643e-07   a 1.408306294298338 2.3638e-06 au q .9582066429517133 3.6492e-07 au i 5.303077590544666 5.1153e-06 deg node 320.7532337628211 3.4637e-06 deg peri 208.1176543953494 0.00021031 deg M 122.0998050577722 0.0011057 deg tp 2458793.458894863541 (2019-Nov-05.95889486) 0.0013537 TDB period 610.4415794428069 1.67 0.0015369 4.208e-06 d yr n .5897370233669165 1.4848e-06 deg/d Q 1.858405945644963 3.1193e-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      .24639      source      ORB      producer      Giorgini      solution date      2018-Mar-31 17:26:30   Additional Information  Earth MOID = .000237742 au   Jupiter MOID = 3.11888 au   T_jup = 4.676  [ 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 ] 2020-Oct-19 16:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin