+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2018 TD3) Classification: Apollo [NEO]          SPK-ID: 3831476 [ 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 4 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4566650012111515 0.00037565   a 1.245462491241019 0.00052846 au q .6767033611699954 0.00018076 au i 2.937521835183569 0.0024432 deg node 15.78021847876863 0.00023153 deg peri 263.0188362197358 0.00076732 deg M 251.502369805307 0.40265 deg tp 2459353.507302127142 (2021-May-19.00730213) 0.66522 TDB period 507.6850864569882 1.39 0.32313 0.0008847 d yr n .7091009950919638 0.00045132 deg/d Q 1.814221621312043 0.0007698 au   Orbit Determination Parameters    # obs. used (total)      38      data-arc span      6 days      first obs. used      2018-10-06      last obs. used      2018-10-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      7      norm. resid. RMS      .44051      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 20:43:22   Additional Information  Earth MOID = .0044473 au   Jupiter MOID = 3.33751 au   T_jup = 5.047  [ 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 27.2   .23018 E2018V43 autocmod 2.6q [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Apr-21 21:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin