+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   146752 (2001 XU143) Classification: Main-belt Asteroid          SPK-ID: 2146752 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1187586802189125 5.1351e-08   a 2.915700699500078 1.7603e-08 au q 2.569435932514088 1.5444e-07 au i .8909832064450274 3.4386e-06 deg node 264.6205909257549 0.00030073 deg peri 89.04728482088102 0.00030119 deg M 4.358114311518181 1.4906e-05 deg tp 2459178.485493460986 (2020-Nov-24.98549346) 7.5343e-05 TDB period 1818.498044693118 4.98 1.6469e-05 4.509e-08 d yr n .1979655689213304 1.7928e-09 deg/d Q 3.261965466486067 1.9694e-08 au   Orbit Determination Parameters    # obs. used (total)      528      data-arc span      7405 days (20.27 yr)      first obs. used      2000-08-31      last obs. used      2020-12-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53324      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:02:30   Additional Information  Earth MOID = 1.56274 au   Jupiter MOID = 2.16458 au   T_jup = 3.271  [ hide covariance matrix ] Orbital Elements at Epoch 2457778.5 (2017-Jan-25.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1216504742014255 5.1261e-08   q 2.560219804022503 1.5482e-07 au tp 2457362.788085387012 (2015-Dec-06.28808539) 7.8749e-05 TDB node 264.7121694798278 0.00030096 deg peri 89.61731199508516 0.0003014 deg i .8903441999675421 3.4375e-06 deg   Orbit Determination Parameters    # obs. used (total)      528      data-arc span      7405 days (20.27 yr)      first obs. used      2000-08-31      last obs. used      2020-12-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53324      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 19:02:30   Additional Information  Jupiter MOID = 2.16458 au   T_jup = 3.271  Orbit Covariance (6×6)   e q tp node peri i e 2.627714094803238E-15 -7.899317466641454E-15 4.046251440726196E-14 3.874872191859103E-14 5.711558391271836E-14 -6.658080526880914E-16 q -7.899317466641454E-15 2.397011947542947E-14 -6.496992765261133E-13 -1.143244632304545E-13 -2.73593199213791E-13 2.033946849154466E-15 tp 4.046251440726196E-14 -6.496992765261133E-13 6.201451733314336E-9 1.706929791746384E-12 1.309369483475924E-9 4.066698113950941E-13 node 3.874872191859103E-14 -1.143244632304545E-13 1.706929791746384E-12 9.05764011268204E-8 -9.056351761680334E-8 2.466387142492173E-10 peri 5.711558391271836E-14 -2.73593199213791E-13 1.309369483475924E-9 -9.056351761680334E-8 9.083906889299935E-8 -2.465445004089092E-10 i -6.658080526880914E-16 2.033946849154466E-15 4.066698113950941E-13 2.466387142492173E-10 -2.465445004089092E-10 1.181671512904639E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.91   n/a E2021B55   146752 (2001 XU143)          Discovered 2001-Dec-14 by LINEAR at Socorro Reference: 20070106/Numbers.arc Last Updated: 2007-01-09 [ show close-approach data ] Alternate Designations  2001 XU143 = 2004 HL59  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 01:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin