+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100889 (1998 HU117) Classification: Main-belt Asteroid          SPK-ID: 2100889 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .108748743454179 3.4068e-08   a 2.263758582626159 8.2768e-09 au q 2.017577681281951 7.6553e-08 au i 5.723792977344867 3.4796e-06 deg node 106.8852775288914 3.8111e-05 deg peri 107.3336024440655 4.1485e-05 deg M 233.9572628151824 1.7321e-05 deg tp 2459636.070959641995 (2022-Feb-25.57095964) 6.0863e-05 TDB period 1244.066488664024 3.41 6.8228e-06 1.868e-08 d yr n .2893736012346062 1.587e-09 deg/d Q 2.509939483970367 9.1769e-09 au   Orbit Determination Parameters    # obs. used (total)      757      data-arc span      8347 days (22.85 yr)      first obs. used      1998-03-24      last obs. used      2021-01-29      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .57483      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:34:13   Additional Information  Earth MOID = 1.01833 au   Jupiter MOID = 2.46748 au   T_jup = 3.603  [ hide covariance matrix ] Orbital Elements at Epoch 2457361.5 (2015-Dec-05.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1084734310763301 3.4131e-08   q 2.018102175909247 7.6651e-08 au tp 2457148.509670385610 (2015-May-06.00967039) 5.6382e-05 TDB node 106.9079902288647 3.8132e-05 deg peri 107.4669647074749 4.1513e-05 deg i 5.722380258884858 3.4785e-06 deg   Orbit Determination Parameters    # obs. used (total)      757      data-arc span      8347 days (22.85 yr)      first obs. used      1998-03-24      last obs. used      2021-01-29      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .57483      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:34:13   Additional Information  Jupiter MOID = 2.46748 au   T_jup = 3.603  Orbit Covariance (6×6)   e q tp node peri i e 1.164912086580066E-15 -2.604148133159403E-15 -1.501497132643007E-13 -4.66814875493048E-15 -3.667871717867082E-14 -2.543113266497128E-15 q -2.604148133159403E-15 5.875331321198223E-15 4.325022189522818E-13 1.068693966943948E-14 1.120333996097916E-13 5.835882925800255E-15 tp -1.501497132643007E-13 4.325022189522818E-13 3.178924337408963E-9 1.535780611287045E-11 9.385407626753282E-10 7.282677534537674E-13 node -4.66814875493048E-15 1.068693966943948E-14 1.535780611287045E-11 1.454027143935753E-9 -1.442084467208397E-9 6.937470112296911E-12 peri -3.667871717867082E-14 1.120333996097916E-13 9.385407626753282E-10 -1.442084467208397E-9 1.723339533442061E-9 -6.669719656266775E-12 i -2.543113266497128E-15 5.835882925800255E-15 7.282677534537674E-13 6.937470112296911E-12 -6.669719656266775E-12 1.210008619342418E-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 MPO337988   100889 (1998 HU117)          Discovered 1998-Apr-23 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1998 HU117 = 2000 YJ118  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 14:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin