+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1132909593492937 5.2777e-08   a 3.096051888024442 2.7837e-08 au q 2.745297199434961 1.6705e-07 au i 1.621063804426344 4.2483e-06 deg node 111.5763724407321 0.00023261 deg peri 138.4125862965773 0.00023394 deg M 16.5272495641148 2.6588e-05 deg tp 2458909.149935769366 (2020-Feb-29.64993577) 0.00014659 TDB period 1989.806168016772 5.45 2.6836e-05 7.347e-08 d yr n .1809221449739548 2.44e-09 deg/d Q 3.446806576613922 3.0991e-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 = 1.73146 au   Jupiter MOID = 1.58089 au   T_jup = 3.213  [ 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-01 17:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin