+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1479842846098152 3.171e-08   a 2.37991348821642 9.2538e-09 au q 2.027723693229464 7.6392e-08 au i 5.691796620653177 4.733e-06 deg node 41.92432746233763 3.6169e-05 deg peri 85.36185450445683 3.9717e-05 deg M 291.6719100246664 1.737e-05 deg tp 2459255.028819012337 (2021-Feb-09.52881901) 6.5373e-05 TDB period 1341.035215202415 3.67 7.8215e-06 2.141e-08 d yr n .2684493262510351 1.5657e-09 deg/d Q 2.732103283203377 1.0623e-08 au   Orbit Determination Parameters    # obs. used (total)      840      data-arc span      7951 days (21.77 yr)      first obs. used      1999-01-19      last obs. used      2020-10-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59233      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 18:12:14   Additional Information  Earth MOID = 1.05226 au   Jupiter MOID = 2.33575 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 ] 2020-Nov-25 06:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin