+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   255P/Levy (2006 T1) Classification: Jupiter-family Comet [NEO]          SPK-ID: 1002422 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456364.5 (2013-Mar-13.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6682869992305696 3.1043e-06   a 3.037514809560926 3.4517e-05 AU q 1.00758315236104 2.2594e-06 AU i 18.26637618115479 4.4657e-05 deg node 279.7336470187495 5.2229e-05 deg peri 179.6577705612744 0.00032713 deg M 78.75615665484072 0.0013653 deg tp 2455941.482780468534 (2012-Jan-14.98278047) 0.00014348 JED period 1933.641831948989 5.29 0.032959 9.024e-05 d yr n .1861771885836493 3.1734e-06 deg/d Q 5.067446466760813 5.7584e-05 AU Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 7.640194258438214E-9 6.483E-10 A2 [EST] -4.181900150936842E-9 2.026E-10   Orbit Determination Parameters    # obs. used (total)      503      data-arc span      1941 days (5.31 yr)      first obs. used      2006-10-02      last obs. used      2012-01-25      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      4      fit RMS      .94332      data source      ORB      producer      Ryan S. Park      solution date      2013-Mar-03 19:30:54   Additional Information  Earth MOID = .023582 AU   T_jup = 2.792  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 11.5 mag 1. 35 from 137 observations, assumed slope, autocmod 2.5b comet total magnitude slope K1 40.   n/a 35 autocmod 2.5b comet nuclear magnitude M2 15.2 mag 1. 35 from 109 observations, autocmod 2.5b comet nuclear magnitude slope K2 5.   n/a 35 autocmod 2.5b comet nuclear phase coefficient PC 0.03   n/a 35 autocmod 2.5b [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2012.0   255P/2011 Y1         2006.7   255P/2006 T1        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2013-May-18 14:33 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin