+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   249475 (2009 KL23) Classification: Main-belt Asteroid          SPK-ID: 2249475 [ 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 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08081030294840706 6.1008e-08   a 3.087563358694443 4.4031e-08 au q 2.838056428305944 2.0148e-07 au i 10.53006642318379 6.9863e-06 deg node 94.99393445320142 4.307e-05 deg peri 235.9569461716355 6.5632e-05 deg M 282.7662212942194 5.153e-05 deg tp 2459425.635163060774 (2021-Jul-30.13516306) 0.00028549 TDB period 1981.628521438945 5.43 4.239e-05 1.161e-07 d yr n .1816687618820649 3.8861e-09 deg/d Q 3.337070289082942 4.7589e-08 au   Orbit Determination Parameters    # obs. used (total)      207      data-arc span      5341 days (14.62 yr)      first obs. used      2005-09-13      last obs. used      2020-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60456      source      ORB      producer      Otto Matic      solution date      2020-May-21 13:44:36   Additional Information  Earth MOID = 1.8422 au   Jupiter MOID = 1.94542 au   T_jup = 3.195  [ 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 15.4   n/a MPO300178   diameter diameter 3.270 km 1.139 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.137   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   249475 (2009 KL23)          Discovered 2009-May-27 by Spacewatch at Kitt Peak Reference: 20100824/Numbers.arc Last Updated: 2010-08-27 [ show close-approach data ] Alternate Designations  2009 KL23 = 2005 TF68  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-12 07:08 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin