+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100894 (1998 HK145) Classification: Main-belt Asteroid          SPK-ID: 2100894 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1642210610820662 3.6983e-08   a 2.352647860376811 9.8272e-09 au q 1.966293532393279 8.5575e-08 au i 7.328496935528915 4.1214e-06 deg node 75.54610023992811 3.2023e-05 deg peri 189.934605165942 3.4313e-05 deg M 9.341586991991692 1.202e-05 deg tp 2458966.297962397718 (2020-Apr-26.79796240) 4.4018e-05 TDB period 1318.055866457915 3.61 8.2584e-06 2.261e-08 d yr n .2731295456902354 1.7113e-09 deg/d Q 2.739002188360344 1.1441e-08 au   Orbit Determination Parameters    # obs. used (total)      694      data-arc span      8177 days (22.39 yr)      first obs. used      1998-04-21      last obs. used      2020-09-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55685      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:03:38   Additional Information  Earth MOID = .950997 au   Jupiter MOID = 2.33769 au   T_jup = 3.527  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.0   n/a MPO436470   100894 (1998 HK145)          Discovered 1998-Apr-21 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-17 10:59 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin