+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   102071 (1999 RK139) Classification: Main-belt Asteroid          SPK-ID: 2102071 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1330913182615938 4.4272e-08   a 2.216093417175544 8.2426e-09 au q 1.921150622892811 9.9089e-08 au i 7.437988432624346 4.0939e-06 deg node 161.58869796 3.3202e-05 deg peri 219.6661169433014 3.6028e-05 deg M 126.9945685720041 1.2875e-05 deg tp 2458775.427343991468 (2019-Oct-18.92734399) 4.3498e-05 TDB period 1204.981897129781 3.30 6.7228e-06 1.841e-08 d yr n .2987596750270735 1.6668e-09 deg/d Q 2.511036211458277 9.3396e-09 au   Orbit Determination Parameters    # obs. used (total)      669      data-arc span      7833 days (21.45 yr)      first obs. used      1999-08-07      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51036      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:30:29   Additional Information  Earth MOID = .927619 au   Jupiter MOID = 2.95787 au   T_jup = 3.631  [ 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 16.2   n/a MPO449617   102071 (1999 RK139)          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-Feb-28 20:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin