+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   70451 (1999 TQ18) Classification: Main-belt Asteroid          SPK-ID: 2070451 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO247866 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2187525 n/a   a 2.5951145 n/a AU q 2.0274267 n/a AU i 4.23844 n/a deg node 16.67494 n/a deg peri 300.54386 n/a deg M 128.97039 n/a deg tp 2455853.4579396 (2011-Oct-18.95793960) n/a JED period 1526.9795009 4.18 n/a n/a d yr n 0.23575955 n/a deg/d Q 3.1628023 n/a AU   Orbit Determination Parameters    # obs. used (total)      325      first obs. used      1997-??-??      last obs. used      2012-12-13      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.55      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.380  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.4 mag n/a MPO247866   70451 (1999 TQ18)          Discovered 1999-Oct-14 by BAO Schmidt CCD Asteroid Program at Xinglong (327) Reference: 20031109/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 TQ18 = 1998 HL72  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 05:21 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin