+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   85242 (1993 QP4) Classification: Main-belt Asteroid          SPK-ID: 2085242 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2306740653502636 4.5518e-08   a 2.404369074900946 1.0748e-08 au q 1.849743485791093 1.1283e-07 au i 2.945752556207682 4.736e-06 deg node 134.6722076744003 7.8205e-05 deg peri 216.3829376958908 7.8893e-05 deg M 58.68855154180542 8.3944e-06 deg tp 2458778.501000439660 (2019-Oct-22.00100044) 3.1821e-05 TDB period 1361.758600990406 3.73 9.1313e-06 2.5e-08 d yr n .2643640361354591 1.7727e-09 deg/d Q 2.9589946640108 1.3228e-08 au   Orbit Determination Parameters    # obs. used (total)      647      data-arc span      9955 days (27.26 yr)      first obs. used      1993-08-15      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51246      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:14:11   Additional Information  Earth MOID = .84486 au   Jupiter MOID = 2.47414 au   T_jup = 3.485  [ hide covariance matrix ] Orbital Elements at Epoch 2457377.5 (2015-Dec-21.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2322490526430857 4.5568e-08   q 1.845430257507785 1.1312e-07 au tp 2457417.115540433467 (2016-Jan-29.61554043) 3.3194e-05 TDB node 134.745750298481 7.8239e-05 deg peri 216.3529879124386 7.891e-05 deg i 2.94587353055448 4.7374e-06 deg   Orbit Determination Parameters    # obs. used (total)      647      data-arc span      9955 days (27.26 yr)      first obs. used      1993-08-15      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51246      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:14:11   Additional Information  Jupiter MOID = 2.47414 au   T_jup = 3.485  Orbit Covariance (6×6)   e q tp node peri i e 2.076467436703951E-15 -5.142815538019656E-15 -7.925756107835947E-14 2.187160532519283E-14 -2.004033441499252E-14 -1.768248224454946E-15 q -5.142815538019656E-15 1.279602274230406E-14 9.610420328334482E-14 -5.507594093496306E-14 2.024439705001866E-14 4.568307663188197E-15 tp -7.925756107835947E-14 9.610420328334482E-14 1.101837137285032E-9 -6.485814959358647E-12 3.549340070980566E-10 -1.896110000573064E-14 node 2.187160532519283E-14 -5.507594093496306E-14 -6.485814959358647E-12 6.121292313718589E-9 -6.113725706483203E-9 5.492255933537175E-11 peri -2.004033441499252E-14 2.024439705001866E-14 3.549340070980566E-10 -6.113725706483203E-9 6.226859983089006E-9 -5.490096332003982E-11 i -1.768248224454946E-15 4.568307663188197E-15 -1.896110000573064E-14 5.492255933537175E-11 -5.490096332003982E-11 2.244250045399912E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.0   n/a MPO493473   85242 (1993 QP4)          Discovered 1993-Aug-18 by Elst, E. W. at Caussols Reference: 20040830/Numbers.arc Last Updated: 2004-09-06 [ show close-approach data ] Alternate Designations  1993 QP4 = 2001 XM172  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 15:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin