+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   117842 (2005 JR109) Classification: Main-belt Asteroid          SPK-ID: 2117842 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1103206121310527 4.7232e-08   a 2.224982091474055 1.035e-08 au q 1.979520705162007 1.0303e-07 au i 7.3197759892237 6.6329e-06 deg node 60.10043661770898 3.6676e-05 deg peri 209.130115267633 4.9235e-05 deg M 170.3996350548086 3.5391e-05 deg tp 2458426.708162273251 (2018-Nov-04.20816227) 0.00011809 TDB period 1212.238873136016 3.32 8.4587e-06 2.316e-08 d yr n .2969711729081031 2.0722e-09 deg/d Q 2.470443477786103 1.1492e-08 au   Orbit Determination Parameters    # obs. used (total)      503      data-arc span      7919 days (21.68 yr)      first obs. used      1998-03-24      last obs. used      2019-11-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53429      source      ORB      producer      Otto Matic      solution date      2019-Dec-14 09:50:13   Additional Information  Earth MOID = .967215 au   Jupiter MOID = 2.59414 au   T_jup = 3.628  [ 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 16.3   n/a MPO449688   117842 (2005 JR109)          Discovered 2005-May-15 by Broughton, J. at Reedy Creek Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-11 13:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin