+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   C/2012 S4 (PANSTARRS) Classification: Comet          SPK-ID: 1003206 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2456243.5 (2012-Nov-12.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .9997645966212151 6.2545e-05   a 18474.00385201316 4908.7 AU q 4.348842926449437 6.9371e-05 AU i 126.5416303268144 0.00017026 deg node 173.1031244955576 0.00032521 deg peri 163.6050727320118 0.0026003 deg M 359.9999105182332 3.5669e-05 deg tp 2456471.467019598987 (2013-Jun-27.96701960) 0.015603 JED period 917149157.8821952 2511017.54 3.6554e+08 1.001e+06 d yr n 3.925206678827271E-7 1.5644e-07 deg/d Q 36943.65886109986 9816.2 AU   Orbit Determination Parameters    # obs. used (total)      473      data-arc span      123 days      first obs. used      2012-09-28      last obs. used      2013-01-29      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      fit RMS      .59525      data source      ORB      producer      Otto Matic      solution date      2013-Mar-01 08:50:50   Additional Information  Earth MOID = 3.36979 AU   T_jup = -1.539  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 9.3 mag 0.5 15 from 270 observations, assumed slope, autocmod 2.5b comet total magnitude slope K1 9.   n/a 15 autocmod 2.5b comet nuclear magnitude M2 11.8 mag 0.7 15 from 174 observations, autocmod 2.5b comet nuclear magnitude slope K2 5.   n/a 15 autocmod 2.5b comet nuclear phase coefficient PC 0.03   n/a 15 autocmod 2.5b Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2013.5   C/2012 S4        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2013-May-23 20:02 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin