+ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0512906409312061 1.0481e-07   a 2.471809070346276 1.4767e-08 au q 2.345028398868647 2.5146e-07 au i 4.279654692938349 5.4836e-06 deg node 221.0644040428099 6.6314e-05 deg peri 158.3606437599971 8.1265e-05 deg M 265.1331001539999 4.3948e-05 deg tp 2459374.552892080548 (2021-Jun-09.05289208) 0.00017335 TDB period 1419.45232075247 3.89 1.272e-05 3.483e-08 d yr n .2536189449527683 2.2728e-09 deg/d Q 2.598589741823905 1.5525e-08 au   Orbit Determination Parameters    # obs. used (total)      661      data-arc span      6940 days (19.00 yr)      first obs. used      2000-04-24      last obs. used      2019-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57651      source      ORB      producer      Otto Matic      solution date      2019-Jul-13 07:06:29   Additional Information  Earth MOID = 1.3477 au   Jupiter MOID = 2.61636 au   T_jup = 3.478  [ hide covariance matrix ] Orbital Elements at Epoch 2456579.5 (2013-Oct-14.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05048599763788587 1.0383e-07   q 2.345443837182317 2.4812e-07 au tp 2456540.968323847447 (2013-Sep-05.46832385) 0.00018102 TDB node 221.2022038862019 6.6279e-05 deg peri 159.1696937780644 8.2253e-05 deg i 4.281394332421749 5.4837e-06 deg   Orbit Determination Parameters    # obs. used (total)      661      data-arc span      6940 days (19.00 yr)      first obs. used      2000-04-24      last obs. used      2019-04-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57651      source      ORB      producer      Otto Matic      solution date      2019-Jul-13 07:06:29   Additional Information  Jupiter MOID = 2.61636 au   T_jup = 3.478  Orbit Covariance (6×6)   e q tp node peri i e 1.077975305237142E-14 -2.573299313712405E-14 -7.950466694479108E-12 2.451703191068817E-14 -2.57719798288975E-12 1.166550350565378E-14 q -2.573299313712405E-14 6.156390703049877E-14 1.919872868914967E-11 -6.044992194982638E-14 6.207723493298138E-12 -2.762231642833602E-14 tp -7.950466694479108E-12 1.919872868914967E-11 3.276914780598586E-8 -1.743829012716715E-11 8.80260086740014E-9 -1.508948402747066E-11 node 2.451703191068817E-14 -6.044992194982638E-14 -1.743829012716715E-11 4.392890026595668E-9 -4.385443834913684E-9 -1.343553197942479E-10 peri -2.57719798288975E-12 6.207723493298138E-12 8.80260086740014E-9 -4.385443834913684E-9 6.765562616823783E-9 1.295583356606208E-10 i 1.166550350565378E-14 -2.762231642833602E-14 -1.508948402747066E-11 -1.343553197942479E-10 1.295583356606208E-10 3.007136681389685E-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 ] 2020-Oct-28 03:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin