+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2021 DE1) Classification: Apollo [NEO]          SPK-ID: 54123274 [ 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 8 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09151068761800339 0.00011846   a 1.082868690045745 0.00011738 au q .983774631619652 2.1695e-05 au i 3.107446024144684 0.0036797 deg node 341.6802469510346 0.00016131 deg peri 214.5141321848721 0.014642 deg M 265.6698891141889 0.0059308 deg tp 2459308.347471182799 (2021-Apr-03.84747118) 0.011069 TDB period 411.5874481776717 1.13 0.066924 0.0001832 d yr n .8746622415088744 0.00014222 deg/d Q 1.181962748471837 0.00012812 au   Orbit Determination Parameters    # obs. used (total)      35      data-arc span      8 days      first obs. used      2021-02-18      last obs. used      2021-02-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      6      norm. resid. RMS      .51196      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:26:10   Additional Information  Earth MOID = .00464248 au   Jupiter MOID = 3.77385 au   T_jup = 5.712  [ 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 27.64   .31388 E2021D90 autocmod 2.8 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-17 15:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin