+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120158 (2003 HC15) Classification: Main-belt Asteroid          SPK-ID: 2120158 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09414190923501847 4.0734e-08   a 3.002038964123723 2.2268e-08 au q 2.719421284443198 1.2434e-07 au i 11.34560797077406 4.5196e-06 deg node 70.33973758654211 3.311e-05 deg peri 227.9321708996286 5.2098e-05 deg M 62.30113575271528 3.7853e-05 deg tp 2458871.711682980567 (2020-Jan-23.21168298) 0.00020098 TDB period 1899.865751995334 5.20 2.1139e-05 5.788e-08 d yr n .1894870727691733 2.1083e-09 deg/d Q 3.284656643804247 2.4364e-08 au   Orbit Determination Parameters    # obs. used (total)      515      data-arc span      8300 days (22.72 yr)      first obs. used      1998-04-22      last obs. used      2021-01-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .61619      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:37:17   Additional Information  Earth MOID = 1.71643 au   Jupiter MOID = 1.88496 au   T_jup = 3.216  [ 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 15.17   n/a E2021B55   diameter diameter 3.854 km 0.844 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.119   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   120158 (2003 HC15)          Discovered 2003-Apr-26 by NEAT at Haleakala Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ show close-approach data ] Alternate Designations  2003 HC15 = 2002 CD290  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 16:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin