+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   118340 (1999 CL20) Classification: Main-belt Asteroid          SPK-ID: 2118340 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1480571355180597 3.1668e-08   a 2.380361100564051 7.3037e-09 au q 2.027931654515921 7.627e-08 au i 5.691328245743447 3.6343e-06 deg node 41.92157018058865 3.5335e-05 deg peri 85.30191840381408 3.7661e-05 deg M 345.4117558283852 1.1961e-05 deg tp 2459254.857968365868 (2021-Feb-09.35796837) 4.4572e-05 TDB period 1341.413564340303 3.67 6.1738e-06 1.69e-08 d yr n .2683736094297251 1.2352e-09 deg/d Q 2.73279054661218 8.3851e-09 au   Orbit Determination Parameters    # obs. used (total)      1089      data-arc span      8090 days (22.15 yr)      first obs. used      1999-01-19      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54605      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 16:56:48   Additional Information  Earth MOID = 1.05239 au   Jupiter MOID = 2.33465 au   T_jup = 3.517  [ 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 15.7   n/a MPO296885   diameter diameter 1.630 km 0.466 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.383   0.164 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   118340 (1999 CL20)          Discovered 1999-Feb-10 by LINEAR at Socorro Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 [ show close-approach data ] Alternate Designations  1999 CL20 = 2001 SP35  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 22:15 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin