+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   C/2012 E3 (PANSTARRS) Classification: Comet          SPK-ID: 1003177 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2456016.5 (2012-Mar-30.0) TDB Reference: JPL 9 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .982621414832102 0.00032393   a 220.2356899599467 4.1141 AU q 3.827384694979719 0.00031585 AU i 105.6580321472059 0.0032429 deg node 5.531279483858718 0.0015925 deg peri 103.5166254978262 0.0084259 deg M .09712728546871346 0.0027347 deg tp 2455694.416315162132 (2011-May-12.91631516) 0.048849 JED period 1193795.605241971 3268.43 33451 91.58 d yr n .0003015591600599262 8.4499e-06 deg/d Q 436.6439952249137 8.1567 AU   Orbit Determination Parameters    # obs. used (total)      74      data-arc span      96 days      first obs. used      2012-03-14      last obs. used      2012-06-18      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      fit RMS      .473      data source      ORB      producer      Otto Matic      solution date      2013-Jan-26 09:51:04   Additional Information  Earth MOID = 3.43755 AU   T_jup = -0.628  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 9.9 mag 0.6 9 from 44 observations, assumed slope, autocmod 2.5b comet total magnitude slope K1 10.   n/a 9 autocmod 2.5b comet nuclear magnitude M2 13.2 mag 0.5 9 from 11 observations, autocmod 2.5b comet nuclear magnitude slope K2 5.   n/a 9 autocmod 2.5b comet nuclear phase coefficient PC 0.03   n/a 9 autocmod 2.5b Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2011.4   C/2012 E3        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2013-May-19 11:43 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin