+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2018 XO4) Classification: Apollo [NEO]          SPK-ID: 3836902 [ 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 3 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2445978208367797 0.00013636   a 1.278210649617932 0.00021824 au q .9655631101510214 9.4402e-06 au i 3.142174551063128 0.0015251 deg node 297.9216883433716 0.00035036 deg peri 173.4085511630477 0.00064076 deg M 121.220322664751 0.12355 deg tp 2459022.764160754820 (2020-Jun-22.26416075) 0.13563 TDB period 527.8397278748592 1.45 0.13519 0.0003701 d yr n .6820252076314898 0.00017467 deg/d Q 1.590858189084843 0.00027162 au   Orbit Determination Parameters    # obs. used (total)      16      data-arc span      109 days      first obs. used      2018-12-13      last obs. used      2019-04-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      6      norm. resid. RMS      .31363      source      ORB      producer      Otto Matic      solution date      2019-Apr-02 06:57:50   Additional Information  Earth MOID = .0146603 au   Jupiter MOID = 3.50798 au   T_jup = 5.031  [ 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 25.4   .28803 MPO467279 autocmod 2.6q [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Mar-07 22:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin