+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23981 Patjohnson (1999 LC4) Classification: Main-belt Asteroid          SPK-ID: 2023981 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO231584 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0788996 n/a   a 2.3044563 n/a AU q 2.1226356 n/a AU i 6.91350 n/a deg node 167.18255 n/a deg peri 246.90689 n/a deg M 196.14058 n/a deg tp 2456982.0941792 (2014-Nov-20.59417920) n/a JED period 1277.7654438 3.50 n/a n/a d yr n 0.28174185 n/a deg/d Q 2.4862770 n/a AU   Orbit Determination Parameters    # obs. used (total)      771      first obs. used      1995-??-??      last obs. used      2012-05-16      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.57      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.575  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.1 mag n/a PDS3 (MPO 11261)   23981 Patjohnson           Discovered 1999 June 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Patricia Johnson mentored a finalist in the 2007 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition. She teaches at the St. Paul's School, Clearwater, Florida. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20071026/MPCPages.arc Last Updated: 2007-10-28 Alternate Designations  1999 LC4 = 2000 NC1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-20 03:52 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin