+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101731 (1999 EN10) Classification: Main-belt Asteroid          SPK-ID: 2101731 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1110333034722585 1.8727e-07   a 2.549111484491204 1.5165e-08 au q 2.266075215449073 4.8743e-07 au i 1.888791815260698 7.1687e-06 deg node 322.1128094816472 0.00010727 deg peri 192.0699242021124 0.00011165 deg M 90.77958737434651 2.1608e-05 deg tp 2458625.641489751684 (2019-May-22.14148975) 8.9174e-05 TDB period 1486.557359342318 4.07 1.3266e-05 3.632e-08 d yr n .2421702719626447 2.1611e-09 deg/d Q 2.832147753533335 1.6849e-08 au   Orbit Determination Parameters    # obs. used (total)      786      data-arc span      21375 days (58.52 yr)      first obs. used      1960-09-24      last obs. used      2019-04-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57079      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:25:37   Additional Information  Earth MOID = 1.27618 au   Jupiter MOID = 2.15753 au   T_jup = 3.432  [ hide covariance matrix ] Orbital Elements at Epoch 2456422.5 (2013-May-10.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1117977605945262 1.8687e-07   q 2.263140581174262 4.881e-07 au tp 2457140.269083559782 (2015-Apr-27.76908356) 8.8741e-05 TDB node 322.1574423598179 0.00010725 deg peri 192.179639190169 0.0001114 deg i 1.889837257111876 7.1687e-06 deg   Orbit Determination Parameters    # obs. used (total)      786      data-arc span      21375 days (58.52 yr)      first obs. used      1960-09-24      last obs. used      2019-04-03      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57079      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:25:37   Additional Information  Jupiter MOID = 2.15753 au   T_jup = 3.432  Orbit Covariance (6×6)   e q tp node peri i e 3.491977055034138E-14 -9.119355527555785E-14 5.645135081189855E-12 -1.242345490662088E-13 3.645256586186984E-12 -1.375278601040311E-14 q -9.119355527555785E-14 2.382376854471612E-13 -1.461769507486784E-11 3.240818450592671E-13 -9.496771273650818E-12 3.596874734304174E-14 tp 5.645135081189855E-12 -1.461769507486784E-11 7.874976438194195E-9 -1.297598356875807E-11 2.509302307715137E-9 -5.002295513021726E-13 node -1.242345490662088E-13 3.240818450592671E-13 -1.297598356875807E-11 1.150157223180592E-8 -1.150531974113516E-8 -3.930543912827484E-12 peri 3.645256586186984E-12 -9.496771273650818E-12 2.509302307715137E-9 -1.150531974113516E-8 1.240987499226857E-8 3.028644867307421E-12 i -1.375278601040311E-14 3.596874734304174E-14 -5.002295513021726E-13 -3.930543912827484E-12 3.028644867307421E-12 5.138997729478645E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.9   n/a MPO273086   101731 (1999 EN10)          Discovered 1999-Mar-14 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1999 EN10 = 2001 UN59  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-19 03:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin