+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100195 (1994 CR12) Classification: Main-belt Asteroid          SPK-ID: 2100195 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2559739426765385 5.1792e-08   a 3.111012734851985 2.8433e-08 au q 2.314674539395002 1.6538e-07 au i 18.60810606109142 5.5947e-06 deg node 144.3753634792475 1.5635e-05 deg peri 61.29387734485817 1.861e-05 deg M 258.388200910017 1.0972e-05 deg tp 2459566.208559963463 (2021-Dec-17.70855996) 6.6108e-05 TDB period 2004.246390780843 5.49 2.7477e-05 7.523e-08 d yr n .1796186345431043 2.4625e-09 deg/d Q 3.907350930308969 3.5711e-08 au   Orbit Determination Parameters    # obs. used (total)      417      data-arc span      9480 days (25.95 yr)      first obs. used      1994-02-07      last obs. used      2020-01-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50956      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 01:02:07   Additional Information  Earth MOID = 1.37562 au   Jupiter MOID = 1.3786 au   T_jup = 3.089  [ 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 15.0   n/a MPO422317   diameter diameter 4.011 km 0.232 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.145   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100195 (1994 CR12)          Discovered 1994-Feb-07 by Elst, E. W. at La Silla Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1994 CR12 = 2000 KO2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-21 02:05 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin