+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100858 (1998 HB44) Classification: Main-belt Asteroid          SPK-ID: 2100858 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1202038456516812 4.781e-08   a 3.148410253973695 2.9206e-08 au q 2.76995923375687 1.5701e-07 au i 11.66051539901392 6.3309e-06 deg node 35.38641115246637 2.2352e-05 deg peri 212.0239267031793 3.1815e-05 deg M 309.7747088587855 2.2964e-05 deg tp 2459285.178957170645 (2021-Mar-11.67895717) 0.00013083 TDB period 2040.49438545383 5.59 2.8393e-05 7.774e-08 d yr n .1764278316893932 2.4549e-09 deg/d Q 3.526861274190519 3.2717e-08 au   Orbit Determination Parameters    # obs. used (total)      667      data-arc span      16062 days (43.98 yr)      first obs. used      1976-05-02      last obs. used      2020-04-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53077      source      ORB      producer      Otto Matic      solution date      2020-May-20 17:56:32   Additional Information  Earth MOID = 1.7651 au   Jupiter MOID = 1.51305 au   T_jup = 3.165  [ 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 14.6   n/a MPO337988   diameter diameter 7.515 km 0.261 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.060   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100858 (1998 HB44)          Discovered 1998-Apr-20 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 HB44 = 1976 JV10 = 2000 TB68  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-24 04:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin