+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100874 (1998 HG83) Classification: Outer Main-belt Asteroid          SPK-ID: 2100874 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .17791423776472 4.6175e-08   a 3.221780646682696 3.0373e-08 au q 2.648579998683018 1.5173e-07 au i 6.820120810475975 5.2844e-06 deg node 81.39222711783987 4.5568e-05 deg peri 189.8589018266214 4.9624e-05 deg M 250.1766653092467 2.4713e-05 deg tp 2459644.868801870253 (2022-Mar-06.36880187) 0.00015036 TDB period 2112.235704065015 5.78 2.9869e-05 8.178e-08 d yr n .1704355244574159 2.4101e-09 deg/d Q 3.794981294682375 3.5776e-08 au   Orbit Determination Parameters    # obs. used (total)      497      data-arc span      7979 days (21.85 yr)      first obs. used      1998-04-21      last obs. used      2020-02-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58914      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:03:47   Additional Information  Earth MOID = 1.63272 au   Jupiter MOID = 1.31688 au   T_jup = 3.153  [ 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 MPO436470   diameter diameter 5.964 km 0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.072   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100874 (1998 HG83)          Discovered 1998-Apr-21 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 HG83 = 2003 EB2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-27 01:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin