+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 43 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1005062117220154 2.2521e-08   a 2.622284799897901 9.6158e-09 au q 2.35872888860394 5.9527e-08 au i 13.77431197360597 1.1208e-06 deg node 199.6212652853936 1.8272e-06 deg peri 33.28202853618166 8.0769e-06 deg M 257.6623202976858 1.0454e-05 deg tp 2459837.411349825821 (2022-Sep-14.91134983) 4.6315e-05 TDB period 1551.022911590464 4.25 8.5313e-06 2.336e-08 d yr n .232104888528594 1.2767e-09 deg/d Q 2.885840711191862 1.0582e-08 au   Orbit Determination Parameters    # obs. used (total)      2136      data-arc span      9562 days (26.18 yr)      first obs. used      1995-02-02      last obs. used      2021-04-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47939      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 18:44:25   Additional Information  Earth MOID = 1.3617 au   Jupiter MOID = 2.10266 au   T_jup = 3.356  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.71   n/a MPCxxxxx   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 Alternate Designations  1998 QL53 = 2000 AD168  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-31 04:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin