+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   86866 (2000 HD18) Classification: Main-belt Asteroid          SPK-ID: 2086866 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05129075216623383 6.93e-08   a 2.471809090247237 1.2173e-08 au q 2.345028142797122 1.6874e-07 au i 4.279649867907506 5.2032e-06 deg node 221.0644383185663 6.3919e-05 deg peri 158.3606338198882 7.7324e-05 deg M 265.1330671869516 4.2747e-05 deg tp 2459374.553026584432 (2021-Jun-09.05302658) 0.00016905 TDB period 1419.452337894853 3.89 1.0486e-05 2.871e-08 d yr n .2536189418898736 1.8735e-09 deg/d Q 2.598590037697352 1.2798e-08 au   Orbit Determination Parameters    # obs. used (total)      672      data-arc span      7366 days (20.17 yr)      first obs. used      2000-04-24      last obs. used      2020-06-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56602      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:55:50   Additional Information  Earth MOID = 1.3477 au   Jupiter MOID = 2.61636 au   T_jup = 3.478  [ hide covariance matrix ] Orbital Elements at Epoch 2456718.5 (2014-Mar-02.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05059223053259305 6.868e-08   q 2.345557846731126 1.6662e-07 au tp 2456541.515774140981 (2013-Sep-06.01577414) 0.00017093 TDB node 221.2010927707102 6.389e-05 deg peri 159.3236185384286 7.7967e-05 deg i 4.281016540787106 5.2032e-06 deg   Orbit Determination Parameters    # obs. used (total)      672      data-arc span      7366 days (20.17 yr)      first obs. used      2000-04-24      last obs. used      2020-06-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56602      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:55:50   Additional Information  Jupiter MOID = 2.61636 au   T_jup = 3.478  Orbit Covariance (6×6)   e q tp node peri i e 4.716899329135128E-15 -1.14178620836665E-14 -3.391011085565495E-12 1.886942929832831E-14 -1.074934921299867E-12 4.414217349170863E-15 q -1.14178620836665E-14 2.776374091824136E-14 8.423566425990369E-12 -4.635298827070058E-14 2.657677823008728E-12 -1.05400055379036E-14 tp -3.391011085565495E-12 8.423566425990369E-12 2.921544862379234E-8 -2.037480487736299E-11 7.646525107350317E-9 -8.79881054094543E-12 node 1.886942929832831E-14 -4.635298827070058E-14 -2.037480487736299E-11 4.081976344671464E-9 -4.075803738155786E-9 -1.040867675010146E-10 peri -1.074934921299867E-12 2.657677823008728E-12 7.646525107350317E-9 -4.075803738155786E-9 6.078797068346804E-9 1.013752540303657E-10 i 4.414217349170863E-15 -1.05400055379036E-14 -8.79881054094543E-12 -1.040867675010146E-10 1.013752540303657E-10 2.7073258666429E-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 15.9   n/a MPO273029   86866 (2000 HD18)          Discovered 2000-Apr-24 by Spacewatch at Kitt Peak Reference: 20040830/Numbers.arc Last Updated: 2004-09-06 [ show close-approach data ] Alternate Designations  2000 HD18 = 2001 QR66  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 06:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin