+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102586 (1999 UR49) Classification: Main-belt Asteroid          SPK-ID: 2102586 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1800052746366156 5.9579e-08   a 2.158052065619358 7.1758e-09 au q 1.769591310867429 1.2658e-07 au i 3.589471849886841 4.6108e-06 deg node 160.4924201548198 8.8649e-05 deg peri 210.6375155761117 8.9423e-05 deg M 257.2101432086259 1.2555e-05 deg tp 2459531.127569559082 (2021-Nov-12.62756956) 4.1068e-05 TDB period 1157.953992317052 3.17 5.7755e-06 1.581e-08 d yr n .3108931808936937 1.5506e-09 deg/d Q 2.546512820371286 8.4675e-09 au   Orbit Determination Parameters    # obs. used (total)      386      data-arc span      7499 days (20.53 yr)      first obs. used      1999-10-10      last obs. used      2020-04-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56319      source      ORB      producer      Otto Matic      solution date      2020-May-20 18:09:49   Additional Information  Earth MOID = .768804 au   Jupiter MOID = 2.91744 au   T_jup = 3.676  [ 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 17.45   n/a E2021B55   102586 (1999 UR49)          Discovered 1999-Oct-30 by CSS at Catalina Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-03 19:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin