+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2021 CN9) Classification: Amor [NEO]          SPK-ID: 54122193 [ 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 3 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07594267626282944 0.00017969   a 1.147166585476789 0.00037934 au q 1.06004768485639 0.00017559 au i 12.22284971682383 0.034109 deg node 138.4310250282097 0.018275 deg peri 191.9560212847526 0.081533 deg M 331.2557181120305 0.16734 deg tp 2459036.333326110066 (2020-Jul-05.83332611) 0.19284 TDB period 448.7848209220003 1.23 0.2226 0.0006094 d yr n .802166167876183 0.00039789 deg/d Q 1.234285486097188 0.00040815 au   Orbit Determination Parameters    # obs. used (total)      15      data-arc span      7 days      first obs. used      2021-02-12      last obs. used      2021-02-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      7      norm. resid. RMS      .54014      source      ORB      producer      Otto Matic      solution date      2021-Feb-20 05:21:21   Additional Information  Earth MOID = .0486446 au   Jupiter MOID = 3.88725 au   T_jup = 5.451  [ 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 23.62   .13806 E2021D26 autocmod 2.8 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-03 04:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin