+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2018 PD20) Classification: Apollo [NEO]          SPK-ID: 3826710 [ 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 2 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3200998602407478 0.00011648   a 1.069582377025156 8.3206e-05 au q .7272092076234369 6.8023e-05 au i 9.515775311048253 0.0035192 deg node 317.6248006279608 0.00024111 deg peri 260.5093028029711 0.0025842 deg M 290.0528490539862 0.084608 deg tp 2459079.003191630038 (2020-Aug-17.50319163) 0.10412 TDB period 404.0357413359985 1.11 0.047147 0.0001291 d yr n .891010282430984 0.00010397 deg/d Q 1.411955546426876 0.00010984 au   Orbit Determination Parameters    # obs. used (total)      36      data-arc span      3 days      first obs. used      2018-08-11      last obs. used      2018-08-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      6      norm. resid. RMS      .53671      source      ORB      producer      Otto Matic      solution date      2019-Jul-10 05:36:24   Additional Information  Earth MOID = .000163385 au   Jupiter MOID = 3.58979 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 27.4   .2588 MPO452054 autocmod 2.6n [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-17 19:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin