+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2017 UW51) Classification: TransNeptunian Object          SPK-ID: 3789113 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 8 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .9759222274266374 1.2894e-05   a 130.2893206625259 0.069934 au q 3.137076631650217 4.1419e-06 au i 144.1805022695415 4.9836e-05 deg node 241.7607234489408 2.9228e-05 deg peri 216.7633547226921 0.00017531 deg M .5605565541715749 0.00045092 deg tp 2458154.678753038422 (2018-Feb-05.17875304) 0.0008043 TDB period 543202.3702874561 1487.21 437.35 1.197 d yr n .0006627364306409275 5.3359e-07 deg/d Q 257.4415646934016 0.13818 au   Orbit Determination Parameters    # obs. used (total)      181      data-arc span      374 days (1.02 yr)      first obs. used      2017-09-01      last obs. used      2018-09-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      3      norm. resid. RMS      .47853      source      ORB      producer      Otto Matic      solution date      2019-Dec-06 07:23:44   Additional Information  Earth MOID = 2.21773 au   Jupiter MOID = 1.40754 au   T_jup = -1.730  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.3   n/a MPO438039   [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2020-Oct-31 15:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin