+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   C/2011 L4 (PANSTARRS) Classification: Hyperbolic Comet          SPK-ID: 1003133 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2456158.5 (2012-Aug-19.0) TDB Reference: JPL 71 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 1.000064632503464 3.3064e-07   a -4666.11806273359 23.87 AU q .3015828918525512 1.9452e-07 AU i 84.20812503079848 2.6994e-05 deg node 65.66612049501643 6.7956e-06 deg peri 333.6461236974147 2.9306e-05 deg M 359.99937176913 4.8207e-06 deg tp 2456361.664949144301 (2013-Mar-10.16494914) 2.6836e-05 JED period n/a n/a n/a n/a d yr n 3.092220742973056E-6 2.3728e-08 deg/d Q n/a n/a AU   Orbit Determination Parameters    # obs. used (total)      2005      data-arc span      717 days (1.96 yr)      first obs. used      2011-05-21      last obs. used      2013-05-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      fit RMS      .52196      data source      ORB      producer      Otto Matic      solution date      2013-May-07 16:13:06   Additional Information  Earth MOID = .660078 AU  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 4.7 mag 01. 71 2 parameter fit from 363 observations, autocmod 2.5c comet total magnitude slope K1 10.   n/a 71 autocmod 2.5c comet nuclear magnitude M2 9.2 mag 1. 71 from 1478 observations, autocmod 2.5c comet nuclear magnitude slope K2 5.   n/a 71 autocmod 2.5c comet nuclear phase coefficient PC 0.03   n/a 71 autocmod 2.5c [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2013-May-22 05:14 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin