+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   190986 (2001 XR189) Classification: Main-belt Asteroid          SPK-ID: 2190986 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1702448196490647 5.8802e-08   a 2.434673955979572 1.3002e-08 au q 2.020183327439555 1.4106e-07 au i 2.065974458834473 5.9676e-06 deg node 102.089146193774 0.00015645 deg peri 290.7928621838505 0.00015744 deg M 54.41808994254642 1.7756e-05 deg tp 2458990.750740957920 (2020-May-21.25074096) 6.7889e-05 TDB period 1387.585145580644 3.80 1.1115e-05 3.043e-08 d yr n .2594435383994801 2.0783e-09 deg/d Q 2.849164584519589 1.5216e-08 au   Orbit Determination Parameters    # obs. used (total)      349      data-arc span      6976 days (19.10 yr)      first obs. used      2001-12-14      last obs. used      2021-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59394      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 12:03:54   Additional Information  Earth MOID = 1.02627 au   Jupiter MOID = 2.58208 au   T_jup = 3.484  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.7   n/a MPO257853   190986 (2001 XR189)          Discovered 2001-Dec-14 by LINEAR at Socorro Reference: 20080917/Numbers.arc Last Updated: 2008-09-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 10:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin