+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   255P/Levy Classification: Jupiter-family Comet [NEO]          SPK-ID: 1002422 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2454436.5 (2007-Dec-02.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .672091196274492 3.3732e-07   a 3.024106526879721 2.7882e-07 au q .9916311535676303 1.1079e-06 au i 18.33189995216884 4.5197e-05 deg node 279.7822841007105 5.3443e-05 deg peri 179.5784420639241 9.6084e-05 deg M 78.82695047262973 1.9462e-05 deg tp 2454015.902894119036 (2006-Oct-07.40289412) 0.00015421 TDB period 1920.852667892072 5.26 0.00026565 7.273e-07 d yr n .1874167686140453 2.5919e-08 deg/d Q 5.056581900191812 4.662e-07 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 7.288535066076535E-9 6.563E-10 A2 [EST] -4.08122807811744E-9 2.043E-10   Orbit Determination Parameters    # obs. used (total)      500      data-arc span      1941 days (5.31 yr)      first obs. used      2006-10-02      last obs. used      2012-01-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      1      norm. resid. RMS      .91499      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 11:13:05   Additional Information  Earth MOID = .00816779 au   Jupiter MOID = .154483 au   T_jup = 2.792  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 11.5   1. 38 from 137 observations, assumed slope, autocmod 2.8 comet total magnitude slope K1 38.   n/a 38 autocmod 2.8 comet nuclear magnitude M2 15.2   1. 38 from 109 observations, autocmod 2.8 comet nuclear magnitude slope K2 5.   n/a 38 autocmod 2.8 comet nuclear phase coefficient PC 0.03   n/a 38 autocmod 2.8 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2012.0   255P/2011 Y1         2006.8   255P/2006 T1        [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ] 2021-Feb-25 17:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin