+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   21850 Abshir (1999 TF142) Classification: Main-belt Asteroid          SPK-ID: 2021850 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO147074 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0275806 n/a   a 2.6774773 n/a AU q 2.6036309 n/a AU i 2.36588 n/a deg node 305.40428 n/a deg peri 215.97562 n/a deg M 331.54567 n/a deg tp 2455326.9832404 (2010-May-10.48324040) n/a JED period 1600.2473627 4.38 n/a n/a d yr n 0.22496522 n/a deg/d Q 2.7513237 n/a AU   Orbit Determination Parameters    # obs. used (total)      206      first obs. used      1971-??-??      last obs. used      2008-09-24      # oppositions      10      planetary ephem.      DE403      quality code      0      fit RMS      0.59      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.376  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.3 mag n/a PDS3 (MPO 8883)   21850 Abshir           Discovered 1999 Oct. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Iftin Mohamed Abshir (b. 1990) is a finalist in the 2005 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her biochemistry, medicine, health, & microbiology project. She attends the Littleton Academy, Littleton, Colorado. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20051019/MPCPages.arc Last Updated: 2005-10-26 Alternate Designations  1999 TF142 = 1977 RB19 = 1997 EC19  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2009-Nov-23 21:23 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin