+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11263 Pesonen (1979 OA) Classification: Main-belt Asteroid          SPK-ID: 2011263 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3804335368179418 3.963e-08   a 2.899779433222917 1.5134e-08 au q 1.796606087449996 1.1295e-07 au i 25.20380231724968 4.3948e-06 deg node 297.6704164408008 1.5989e-05 deg peri 341.8588369473685 2.1171e-05 deg M 103.575177341401 1.6404e-05 deg tp 2458481.581612832883 (2018-Dec-29.08161283) 8.0524e-05 TDB period 1803.623456655094 4.94 1.412e-05 3.866e-08 d yr n .1995982025359314 1.5625e-09 deg/d Q 4.002952778995838 2.0891e-08 au   Orbit Determination Parameters    # obs. used (total)      1370      data-arc span      14799 days (40.52 yr)      first obs. used      1979-07-23      last obs. used      2020-01-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45949      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 19:59:32   Additional Information  Earth MOID = .791637 au   Jupiter MOID = 1.28337 au   T_jup = 3.044  [ 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 13.8   n/a MPO449023   diameter diameter 10.079 km 1.924 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.026   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   11263 Pesonen           Discovered 1979 July 23 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory. Lauri Pesonen (b. 1944) is an emeritus Professor of geophysics at the University of Helsinki. An expert in supercontinents, he also studied terrestrial impact craters. He introduced planetary geophysics at the University and raised public awareness in Finland about asteroid impacts. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2014-07-12 Last Updated: 2014-08-13 [ show close-approach data ] Alternate Designations  1979 OA = 1969 OY = 2001 YS82  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-15 14:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin