+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2021 DE) Classification: Apollo [NEO]          SPK-ID: 54122968 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459264.5 (2021-Feb-19.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .7590922040432851 0.0011226   a 1.385758542577814 0.0038988 au q .3338400362206105 0.00061644 au i 4.747989376902768 0.012402 deg node 337.2938640815294 0.00015452 deg peri 304.0289300306319 0.0091654 deg M 326.8225306727327 0.17557 deg tp 2459319.412413125393 (2021-Apr-14.91241313) 0.058839 TDB period 595.8401627966995 1.63 2.5146 0.006885 d yr n .6041888789608698 0.0025498 deg/d Q 2.437677048935017 0.0068583 au   Orbit Determination Parameters    # obs. used (total)      73      data-arc span      11 days      first obs. used      2021-02-16      last obs. used      2021-02-27      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      8      norm. resid. RMS      .42999      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:26:04   Additional Information  Earth MOID = .00226773 au   Jupiter MOID = 2.75269 au   T_jup = 4.424  [ 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 24.23   .26605 E2021-DA1 autocmod 2.8 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-21 20:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin