+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 8 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08355785483085099 0.00013766   a 1.069096169713263 0.00014711 au q .9797647871641431 1.2477e-05 au i 3.068100671464687 0.0038094 deg node 340.8607935832654 0.0028331 deg peri 220.1262218456388 0.0065187 deg M 74.5453323103081 0.0097757 deg tp 2459312.893211514424 (2021-Apr-08.39321151) 0.0065728 TDB period 403.760274748222 1.11 0.083338 0.0002282 d yr n .8916181767126294 0.00018404 deg/d Q 1.158427552262382 0.0001594 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 = .00489254 au   Jupiter MOID = 3.79704 au   T_jup = 5.769  [ 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 27.5   .31388 MPO606212 autocmod 2.8 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jul-31 03:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin