+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100952 (1998 QR5) Classification: Mars-crossing Asteroid          SPK-ID: 2100952 [ 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 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3043797097217562 2.9688e-08   a 2.313877000860748 7.9613e-09 au q 1.609579791006906 6.894e-08 au i 18.47287555667807 1.2333e-05 deg node 318.2601446260718 1.2499e-05 deg peri 100.0373381989714 4.5123e-05 deg M 23.04523570274258 3.3778e-05 deg tp 2458918.202340455916 (2020-Mar-09.70234046) 0.00012056 TDB period 1285.608783439104 3.52 6.635e-06 1.817e-08 d yr n .2800229779365476 1.4452e-09 deg/d Q 3.01817421071459 1.0385e-08 au   Orbit Determination Parameters    # obs. used (total)      741      data-arc span      10290 days (28.17 yr)      first obs. used      1991-10-04      last obs. used      2019-12-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54102      source      ORB      producer      Otto Matic      solution date      2019-Dec-14 08:36:26   Additional Information  Earth MOID = .73535 au   Jupiter MOID = 2.57912 au   T_jup = 3.454  [ 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 15.8   n/a MPO395889   100952 (1998 QR5)          Discovered 1998-Aug-19 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-28 00:58 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin