+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   166P/NEAT (2001 T4) Classification: Chiron-type Comet          SPK-ID: 1000356 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2452819.5 (2003-Jun-29.0) TDB Reference: JPL 49 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3831013269717948 8.5656e-06   a 13.88283562101013 0.00022815 AU q 8.564302872469851 2.2699e-05 AU i 15.36840862547431 3.0314e-05 deg node 64.48883575431289 7.0096e-05 deg peri 321.8789170735564 0.0006374 deg M 7.700853205972554 0.00044868 deg tp 2452415.341196460387 (2002-May-20.84119646) 0.013971 JED period 18893.64274096504 51.73 0.46574 0.001275 d yr n .01905402811599962 4.697e-07 deg/d Q 19.20136836955042 0.00031555 AU   Orbit Determination Parameters    # obs. used (total)      168      data-arc span      2742 days (7.51 yr)      first obs. used      2001-08-27      last obs. used      2009-02-28      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      2      fit RMS      .79037      data source      ORB      producer      Otto Matic      solution date      2011-Sep-14 21:11:43   Additional Information  Earth MOID = 7.58249 AU   T_jup = 3.284  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 4.5 mag n/a ICQ 2005 Handbook   comet total magnitude slope K1 10.0   n/a ICQ 2005 Handbook   Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2002.4   166P/2001 T4        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2013-May-24 17:27 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin