+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103604 (2000 CH18) Classification: Main-belt Asteroid          SPK-ID: 2103604 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .01861099992704304 3.7593e-08   a 2.690742017737893 1.6351e-08 au q 2.640664618242082 1.0697e-07 au i 3.477421730968495 6.2878e-06 deg node 191.1770448155834 6.0971e-05 deg peri 303.266359525815 0.00017852 deg M 258.1184634300381 0.00016885 deg tp 2459656.746455292698 (2022-Mar-18.24645529) 0.0007566 TDB period 1612.153972497088 4.41 1.4695e-05 4.023e-08 d yr n .223303732857719 2.0354e-09 deg/d Q 2.740819417233705 1.6655e-08 au   Orbit Determination Parameters    # obs. used (total)      743      data-arc span      7643 days (20.93 yr)      first obs. used      2000-02-02      last obs. used      2021-01-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50456      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:35:11   Additional Information  Earth MOID = 1.6548 au   Jupiter MOID = 2.2363 au   T_jup = 3.369  [ 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 15.52   n/a E2021B55   diameter diameter 2.986 km 1.086 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.150   0.084 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   103604 (2000 CH18)          Discovered 2000-Feb-02 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  2000 CH18 = 2001 KS9 = 2002 RW6  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-02 09:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin