+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   24274 Alliswheeler (1999 XN167) Classification: Main-belt Asteroid          SPK-ID: 2024274 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO101881 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1732696 n/a   a 2.5786733 n/a AU q 2.1318676 n/a AU i 2.98515 n/a deg node 355.54210 n/a deg peri 353.89509 n/a deg M 218.63755 n/a deg tp 2455794.4152554 (2011-Aug-20.91525540) n/a JED period 1512.4914145 4.14 n/a n/a d yr n 0.23801788 n/a deg/d Q 3.0254790 n/a AU   Orbit Determination Parameters    # obs. used (total)      270      first obs. used      1982-??-??      last obs. used      2006-06-15      # oppositions      9      planetary ephem.      DE403      quality code      0      fit RMS      0.64      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.403  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.7 mag n/a PDS3 (MPO 11360)   24274 Alliswheeler           Discovered 1999 Dec. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team in Socorro. Allison Wheeler mentored a finalist in the 2008 Intel Science Talent Search (STS), a science competition for high school seniors. She teaches at the Bronx High School of Science, Bronx, New York. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20080221/MPCPages.arc Last Updated: 2008-03-05 Alternate Designations  1999 XN167 = 1982 SJ6 = 1982 UM3 = 1986 OR  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2009-Nov-23 20:14 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin