+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   452317 (1999 XK219) Classification: Mars-crossing Asteroid          SPK-ID: 2452317 [ 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 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1362936248430314 5.1048e-07   a 1.926718727670874 1.1074e-08 au q 1.664119248223657 9.8496e-07 au i 25.13440266364669 2.4721e-05 deg node 98.9973424033775 2.1722e-05 deg peri 322.2765882008184 8.4476e-05 deg M 263.611156038475 6.945e-05 deg tp 2459262.047260684459 (2021-Feb-16.54726068) 0.00018836 TDB period 976.8455557366076 2.67 8.4214e-06 2.306e-08 d yr n .3685331809986438 3.1771e-09 deg/d Q 2.18931820711809 1.2583e-08 au   Orbit Determination Parameters    # obs. used (total)      67      data-arc span      5912 days (16.19 yr)      first obs. used      1999-12-15      last obs. used      2016-02-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .67552      source      ORB      producer      Otto Matic      solution date      2017-Apr-09 10:51:08   Additional Information  Earth MOID = .709729 au   Jupiter MOID = 3.08419 au   T_jup = 3.792  [ hide covariance matrix ] Orbital Elements at Epoch 2455892.5 (2011-Nov-27.0) TDB Reference: JPL 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1366056961046939 5.1123e-07   q 1.663362425431784 9.872e-07 au tp 2456331.925900075914 (2013-Feb-08.42590008) 0.00019035 TDB node 99.03551176576978 2.1727e-05 deg peri 322.2219559495861 8.4144e-05 deg i 25.13065362670786 2.4716e-05 deg   Orbit Determination Parameters    # obs. used (total)      67      data-arc span      5912 days (16.19 yr)      first obs. used      1999-12-15      last obs. used      2016-02-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .67552      source      ORB      producer      Otto Matic      solution date      2017-Apr-09 10:51:08   Additional Information  Jupiter MOID = 3.08419 au   T_jup = 3.792  Orbit Covariance (6×6)   e q tp node peri i e 2.613533172563521E-13 -5.046591450371215E-13 3.105337200008817E-11 1.218387273886657E-12 -9.301351215005694E-12 -2.612597373177592E-12 q -5.046591450371215E-13 9.745569456315135E-13 -6.017424843707405E-11 -2.356089518298187E-12 1.784778374331145E-11 5.055509924648302E-12 tp 3.105337200008817E-11 -6.017424843707405E-11 3.62337120443221E-8 2.5169096729581E-10 1.32258719190476E-8 -1.034625868984481E-9 node 1.218387273886657E-12 -2.356089518298187E-12 2.5169096729581E-10 4.720586379944466E-10 -4.100157307741287E-10 1.713569727932293E-10 peri -9.301351215005694E-12 1.784778374331145E-11 1.32258719190476E-8 -4.100157307741287E-10 7.080229113712114E-9 -3.995509553922256E-10 i -2.612597373177592E-12 5.055509924648302E-12 -1.034625868984481E-9 1.713569727932293E-10 -3.995509553922256E-10 6.108954621887501E-10 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 18.4   n/a MPO357285   452317 (1999 XK219)          Discovered 1999-Dec-15 by Spacewatch at Kitt Peak Reference: Last Updated: 2016-01-04 Alternate Designations  1999 XK219 = 2007 YD40  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-19 16:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin