+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22686 Mishchenko (1998 QL53) Classification: Main-belt Asteroid          SPK-ID: 2022686 [ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1008915604738839 4.3113e-08   a 2.621380058198576 1.0994e-08 au q 2.3569049335318 1.1024e-07 au i 13.77628699082552 4.3654e-06 deg node 199.6349866470601 1.3477e-05 deg peri 33.31080764392295 2.2524e-05 deg M 165.6970714643848 1.7506e-05 deg tp 2458286.980665653403 (2018-Jun-17.48066565) 7.4902e-05 TDB period 1550.220279058984 4.24 9.7526e-06 2.67e-08 d yr n .2322250617302772 1.461e-09 deg/d Q 2.88585518286535 1.2104e-08 au   Orbit Determination Parameters    # obs. used (total)      1799      data-arc span      9117 days (24.96 yr)      first obs. used      1995-02-02      last obs. used      2020-01-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50169      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 23:45:44   Additional Information  Earth MOID = 1.35938 au   Jupiter MOID = 2.10507 au   T_jup = 3.357  [ 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 13.7   n/a MPO449120   diameter diameter 4.620 km 0.205 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.361   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   22686 Mishchenko           Discovered 1998 Aug. 20 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Michael Ivanovich Mischenko (b. 1959), of the NASA Goddard Institute for Space Studies, studies electromagnetic scattering. He has developed a new branch of statistical optics based on numerically exact solutions of Maxwell's equations. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20090806/MPCPages.arc Last Updated: 2011-05-09 [ show close-approach data ] Alternate Designations  1998 QL53 = 2000 AD168  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 00:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin