+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   166P/NEAT Classification: Chiron-type Comet          SPK-ID: 1000356 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2452819.5 (2003-Jun-29.0) TDB Reference: JPL 50 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3831014579229702 8.5656e-06   a 13.88283939168301 0.00022815 au q 8.564303380618808 2.2699e-05 au i 15.36840608994296 3.0314e-05 deg node 64.48884992736954 7.0096e-05 deg peri 321.8788868930617 0.0006374 deg M 7.700857012594934 0.00044868 deg tp 2452415.340832021408 (2002-May-20.84083202) 0.013971 TDB period 18893.65043842897 51.73 0.46574 0.001275 d yr n .0190540203531962 4.697e-07 deg/d Q 19.20137540274721 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.      DE431      SB-pert. ephem.      SB431-BIG16      condition code      2      norm. resid. RMS      .79049      source      ORB      producer      Otto Matic      solution date      2014-Jun-13 19:41:45   Additional Information  Earth MOID = 7.58249 au   Jupiter MOID = 3.69311 au   T_jup = 3.284  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 5.8   0.6 50 from 86 observations, assumed slope, autocmod 2.5c comet total magnitude slope K1 10.   n/a 50 autocmod 2.5c comet nuclear magnitude M2 10.6   0.8 50 from 23 observations, autocmod 2.5c comet nuclear magnitude slope K2 5.   n/a 50 autocmod 2.5c comet nuclear phase coefficient PC 0.03   n/a 50 autocmod 2.5c Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2002.4   166P/2001 T4        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ] 2021-Feb-25 16:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin