+ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1642210677007995 4.3724e-08   a 2.352647858532209 1.2335e-08 au q 1.96629351528005 1.0515e-07 au i 7.328500778969572 4.8394e-06 deg node 75.54606634297218 3.8901e-05 deg peri 189.9346359428601 4.2966e-05 deg M 9.341590991484598 2.1476e-05 deg tp 2458966.297947794734 (2020-Apr-26.79794779) 7.85e-05 TDB period 1318.055864907775 3.61 1.0366e-05 2.838e-08 d yr n .2731295460114578 2.1481e-09 deg/d Q 2.739002201784368 1.4361e-08 au   Orbit Determination Parameters    # obs. used (total)      552      data-arc span      7651 days (20.95 yr)      first obs. used      1998-04-21      last obs. used      2019-04-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59196      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:13:09   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 ] 2020-Jul-05 05:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin