+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2018 RB1) Classification: Apollo [NEO]          SPK-ID: 3827174 [ 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 4 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2824534219682973 0.0001483   a 1.119423823008374 0.00011263 au q .8032387335668251 8.5256e-05 au i 5.04325708659401 0.0028907 deg node 166.8723313720768 7.6347e-05 deg peri 266.6907421476693 0.00072302 deg M 108.0379304842759 0.063771 deg tp 2458870.673305343977 (2020-Jan-22.17330534) 0.057038 TDB period 432.6037148866952 1.18 0.065292 0.0001788 d yr n .832170385070061 0.0001256 deg/d Q 1.435608912449923 0.00014445 au   Orbit Determination Parameters    # obs. used (total)      41      data-arc span      4 days      first obs. used      2018-09-06      last obs. used      2018-09-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      6      norm. resid. RMS      .34648      source      ORB      producer      Otto Matic      solution date      2018-Sep-10 06:55:17   Additional Information  Earth MOID = .00225947 au   Jupiter MOID = 3.81829 au   T_jup = 5.535  [ 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 27.9   .58105 MPO452092 autocmod 2.6n [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Jan-27 13:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin