+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2018 TW1) Classification: Apollo [NEO]          SPK-ID: 3831214 [ 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 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .47128009074657 0.00048351   a 1.898287004001068 0.0017446 au q 1.00366213249241 4.6116e-06 au i 8.660273127191154 0.0063561 deg node 192.8323123287086 0.0002329 deg peri 191.6848114455877 0.0030846 deg M 223.4627874267427 0.30684 deg tp 2459362.817883114219 (2021-May-28.31788311) 1.3137 TDB period 955.3032134088419 2.62 1.3169 0.003605 d yr n .3768437025511507 0.00051949 deg/d Q 2.792911875509726 0.0025667 au   Orbit Determination Parameters    # obs. used (total)      43      data-arc span      2 days      first obs. used      2018-10-05      last obs. used      2018-10-07      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      7      norm. resid. RMS      .511      source      ORB      producer      Otto Matic      solution date      2018-Oct-07 09:12:11   Additional Information  Earth MOID = .0107613 au   Jupiter MOID = 2.66379 au   T_jup = 3.794  [ 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 27.8   .34321 MPO458800 autocmod 2.6n [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2020-Oct-24 13:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin