+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   P/2012 U2 (PANSTARRS) Classification: Jupiter-family Comet          SPK-ID: 1003217 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2456245.5 (2012-Nov-14.0) TDB Reference: JPL 7 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .506572681032562 4.9253e-05   a 7.352224656156054 0.00055669 AU q 3.627788500533375 0.00016978 AU i 10.5344738305446 0.00091894 deg node 186.8630568923132 0.0047368 deg peri 229.537079226169 0.082043 deg M 358.9972759910672 0.021793 deg tp 2456265.781753180669 (2012-Dec-04.28175318) 0.44233 JED period 7281.596012457456 19.94 0.82701 0.002264 d yr n .04943971066015019 5.6152e-06 deg/d Q 11.07666081177873 0.00083869 AU   Orbit Determination Parameters    # obs. used (total)      36      data-arc span      106 days      first obs. used      2012-10-20      last obs. used      2013-02-03      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      4      fit RMS      .3226      data source      ORB      producer      Otto Matic      solution date      2013-Mar-01 08:51:13   Additional Information  Earth MOID = 2.65192 AU   T_jup = 2.723  [ 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 12.1 mag 0.6 7 from 19 observations, assumed slope, autocmod 2.5b comet total magnitude slope K1 10.   n/a 7 autocmod 2.5b comet nuclear magnitude M2 15.1 mag 0.3 7 from 8 observations, autocmod 2.5b comet nuclear magnitude slope K2 5.   n/a 7 autocmod 2.5b comet nuclear phase coefficient PC 0.03   n/a 7 autocmod 2.5b [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2012.9   P/2012 U2        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2013-Jun-19 09:38 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin