+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   22444 (1996 TK12) Classification: Main-belt Asteroid          SPK-ID: 2022444 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO229208 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2199818 n/a   a 2.2979233 n/a AU q 1.7924220 n/a AU i 1.52523 n/a deg node 24.86917 n/a deg peri 329.83268 n/a deg M 288.64272 n/a deg tp 2456652.6956097 (2013-Dec-26.19560970) n/a JED period 1272.3357660 3.48 n/a n/a d yr n 0.28294418 n/a deg/d Q 2.8034246 n/a AU   Orbit Determination Parameters    # obs. used (total)      659      first obs. used      1982-??-??      last obs. used      2012-04-21      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.560  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.2 mag n/a PDS3 (MPO 10000)   22444 (1996 TK12)          Discovered 1996-Oct-15 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905) Reference: 20010309/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1996 TK12 = 1982 SW11 = 1999 NY12  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 04:54 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin