+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   4210 Isobelthompson (1987 DY5) Classification: Main-belt Asteroid          SPK-ID: 2004210 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07790050653967537 5.4311e-08   a 2.988101469463794 2.3554e-08 AU q 2.755326851400616 1.6158e-07 AU i 10.44076473513836 9.3237e-06 deg node 159.9271259479274 3.1317e-05 deg peri 285.3658581674678 7.0779e-05 deg M 77.3285692618673 6.2196e-05 deg tp 2455995.244504679672 (2012-Mar-08.74450468) 0.00032547 JED period 1886.650428268835 5.17 2.2307e-05 6.107e-08 d yr n .1908143631729017 2.2562e-09 deg/d Q 3.220876087526972 2.5389e-08 AU   Orbit Determination Parameters    # obs. used (total)      993      data-arc span      21786 days (59.65 yr)      first obs. used      1953-08-15      last obs. used      2013-04-08      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .50365      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:02:02   Additional Information  Earth MOID = 1.79404 AU   T_jup = 3.227  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.9 mag n/a PDS3 (MPC 17271)   4210 Isobelthompson           Discovered 1987 Feb. 21 by H. Debehogne at the European Southern Observatory. The British archaeologist Isobel Thompson is co-author of Alban's Buried Towns: An Assessment of St. Albans' Archaeology up to A.D. 1600, the first in a series of studies of important archaeological sites in England. The citation was prepared by M. M. Dworetsky. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20060219/MPCPages.arc Last Updated: 2010-06-03 [ show close-approach data ] Alternate Designations  1987 DY5 = 1951 EL = 1979 QZ5 = 1982 DE5 = 1982 DJ6  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-24 03:35 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin