+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100880 (1998 HM93) Classification: Main-belt Asteroid          SPK-ID: 2100880 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1457853054725879 3.893e-08   a 3.154821236362944 2.4509e-08 au q 2.694894658708365 1.3423e-07 au i 4.605291105712506 5.1971e-06 deg node 346.5617690557281 5.2436e-05 deg peri 287.2634747665076 5.5555e-05 deg M 288.9690303626311 2.015e-05 deg tp 2459404.336717051265 (2021-Jul-08.83671705) 0.00011674 TDB period 2046.730023265392 5.60 2.3851e-05 6.53e-08 d yr n .1758903206128032 2.0497e-09 deg/d Q 3.614747814017524 2.8082e-08 au   Orbit Determination Parameters    # obs. used (total)      640      data-arc span      8043 days (22.02 yr)      first obs. used      1998-04-21      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57558      source      ORB      producer      Otto Matic      solution date      2020-May-20 17:56:33   Additional Information  Earth MOID = 1.68333 au   Jupiter MOID = 1.5458 au   T_jup = 3.185  [ show covariance matrix ] [ 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 14.7   n/a MPO432536   diameter diameter 6.179 km 0.242 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.067   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100880 (1998 HM93)          Discovered 1998-Apr-21 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 HM93 = 2003 ER37  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-05 04:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin