+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102142 (1999 RB185) Classification: Main-belt Asteroid          SPK-ID: 2102142 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .275731501480619 4.8112e-08   a 2.595024603550071 1.0539e-08 au q 1.879494573234062 1.252e-07 au i 5.38165531440221 3.3303e-06 deg node 114.9646857208473 5.8723e-05 deg peri 253.3729671823576 5.9329e-05 deg M 22.92285994337659 6.8717e-06 deg tp 2459103.275225021661 (2020-Sep-10.77522502) 2.928e-05 TDB period 1526.90018080904 4.18 9.302e-06 2.547e-08 d yr n .2357717973477815 1.4363e-09 deg/d Q 3.31055463386608 1.3445e-08 au   Orbit Determination Parameters    # obs. used (total)      568      data-arc span      10611 days (29.05 yr)      first obs. used      1991-12-28      last obs. used      2021-01-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45478      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:30:39   Additional Information  Earth MOID = .885498 au   Jupiter MOID = 2.17079 au   T_jup = 3.357  [ 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 16.39   n/a E2021B55   102142 (1999 RB185)          Discovered 1999-Sep-09 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-04 20:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin