+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120155 (2003 HS8) Classification: Main-belt Asteroid          SPK-ID: 2120155 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1140208898545666 5.254e-08   a 3.097053504421987 2.9372e-08 au q 2.743924707920588 1.6777e-07 au i 1.621465076115455 4.2466e-06 deg node 111.5771648347211 0.00023258 deg peri 138.165711425232 0.0002339 deg M 52.85892461197048 2.6712e-05 deg tp 2458908.194281404171 (2020-Feb-28.69428140) 0.00014627 TDB period 1990.771841594897 5.45 2.8321e-05 7.754e-08 d yr n .1808343841711101 2.5725e-09 deg/d Q 3.450182300923386 3.2722e-08 au   Orbit Determination Parameters    # obs. used (total)      499      data-arc span      6343 days (17.37 yr)      first obs. used      2002-01-14      last obs. used      2019-05-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56655      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 17:59:08   Additional Information  Earth MOID = 1.72856 au   Jupiter MOID = 1.57601 au   T_jup = 3.212  [ 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 15.5   n/a MPO432703   diameter diameter 5.710 km 0.555 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.041   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   120155 (2003 HS8)          Discovered 2003-Apr-24 by LONEOS at Anderson Mesa Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ show close-approach data ] Alternate Designations  2003 HS8 = 2002 CO287  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-05 14:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin