+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 42 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1006615195503362 2.2533e-08   a 2.62193769099288 9.5926e-09 au q 2.358009458851237 5.9559e-08 au i 13.77470372766175 1.1209e-06 deg node 199.6296108337693 1.8274e-06 deg peri 33.30839004813689 8.0648e-06 deg M 212.1403037356134 1.0318e-05 deg tp 2459837.411786473967 (2022-Sep-14.91178647) 4.6253e-05 TDB period 1550.714961030625 4.25 8.5101e-06 2.33e-08 d yr n .2321509813516853 1.274e-09 deg/d Q 2.885865923134523 1.0558e-08 au   Orbit Determination Parameters    # obs. used (total)      2132      data-arc span      9537 days (26.11 yr)      first obs. used      1995-02-02      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47884      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:09:23   Additional Information  Earth MOID = 1.35934 au   Jupiter MOID = 2.10385 au   T_jup = 3.356  [ 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 13.69   n/a E2021B10   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 ] 2021-Apr-16 19:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin