+ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3043797297289979 2.9639e-08   a 2.3138770041679 7.9561e-09 au q 1.609579747013132 6.8838e-08 au i 18.47288877234307 1.2293e-05 deg node 318.2601630323279 1.2492e-05 deg peri 100.0373281334944 4.4787e-05 deg M 23.04523186109802 3.3489e-05 deg tp 2458918.202353998511 (2020-Mar-09.70235400) 0.00011954 TDB period 1285.608786195325 3.52 6.6307e-06 1.815e-08 d yr n .2800229773362055 1.4443e-09 deg/d Q 3.018174261322669 1.0378e-08 au   Orbit Determination Parameters    # obs. used (total)      746      data-arc span      10373 days (28.40 yr)      first obs. used      1991-10-04      last obs. used      2020-02-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53951      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:03:17   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 15.83   n/a E2021B55   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 ] 2021-Feb-28 17:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin