+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2021 CR2) Classification: Apollo [NEO]          SPK-ID: 54110693 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459254.5 (2021-Feb-09.0) TDB Reference: JPL 5 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2821790396985227 0.00076929   a 1.274229504305151 0.0013457 au q .9146686464247992 1.4468e-05 au i 24.06524888676042 0.039703 deg node 138.7699442008976 0.0012391 deg peri 56.0840270415421 0.0469 deg M 329.0842861043905 0.085168 deg tp 2459299.617672848976 (2021-Mar-26.11767285) 0.052819 TDB period 525.3756157944663 1.44 0.83228 0.002279 d yr n .6852240362461677 0.0010855 deg/d Q 1.633790362185503 0.0017255 au   Orbit Determination Parameters    # obs. used (total)      36      data-arc span      5 days      first obs. used      2021-02-06      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      8      norm. resid. RMS      .5247      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:25:01   Additional Information  Earth MOID = .0238666 au   Jupiter MOID = 3.42147 au   T_jup = 4.951  [ 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 24.66   .56452 E2021-CK0 autocmod 2.8 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-17 04:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin