+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   78457 (2002 RZ31) Classification: Main-belt Asteroid          SPK-ID: 2078457 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1534501052864451 3.807e-08   a 2.691746895928876 1.1003e-08 au q 2.278698051344128 1.0578e-07 au i 2.460358856976408 3.6896e-06 deg node 268.9552640825273 0.00012233 deg peri 163.0985034586388 0.00012376 deg M 299.2150919215944 1.703e-05 deg tp 2459272.859809495434 (2021-Feb-27.35980950) 7.6209e-05 TDB period 1613.057163661145 4.42 9.8904e-06 2.708e-08 d yr n .2231786994968675 1.3684e-09 deg/d Q 3.104795740513624 1.2691e-08 au   Orbit Determination Parameters    # obs. used (total)      776      data-arc span      9930 days (27.19 yr)      first obs. used      1993-09-09      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52961      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:06:34   Additional Information  Earth MOID = 1.29354 au   Jupiter MOID = 2.16427 au   T_jup = 3.353  [ hide covariance matrix ] Orbital Elements at Epoch 2457209.5 (2015-Jul-06.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1529210414991255 3.8048e-08   q 2.281627193029522 1.0561e-07 au tp 2457651.589123627842 (2016-Sep-20.08912363) 7.7966e-05 TDB node 269.1272339851403 0.00012294 deg peri 161.6182078535533 0.00012436 deg i 2.452172012561232 3.6842e-06 deg   Orbit Determination Parameters    # obs. used (total)      776      data-arc span      9930 days (27.19 yr)      first obs. used      1993-09-09      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52961      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:06:34   Additional Information  Jupiter MOID = 2.16427 au   T_jup = 3.353  Orbit Covariance (6×6)   e q tp node peri i e 1.447640797835979E-15 -4.004712484824223E-15 -6.242322362051522E-13 -2.426997792529274E-14 -9.13994568080813E-14 -1.07480628819668E-15 q -4.004712484824223E-15 1.115449335751671E-14 1.60507811762599E-12 7.035669715851597E-14 2.147305874046758E-13 2.990071225874317E-15 tp -6.242322362051522E-13 1.60507811762599E-12 6.078620286853782E-9 5.676215245754678E-11 1.493554835872156E-9 1.96563620441463E-12 node -2.426997792529274E-14 7.035669715851597E-14 5.676215245754678E-11 1.511318371504112E-8 -1.50859446776928E-8 -7.919646222660307E-11 peri -9.13994568080813E-14 2.147305874046758E-13 1.493554835872156E-9 -1.50859446776928E-8 1.546484244251008E-8 7.958914199874187E-11 i -1.07480628819668E-15 2.990071225874317E-15 1.96563620441463E-12 -7.919646222660307E-11 7.958914199874187E-11 1.357300524033637E-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 15.4   n/a MPO439582   78457 (2002 RZ31)          Discovered 2002-Sep-04 by LONEOS at Anderson Mesa Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 04:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin