+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   C/2011 Q1 (PANSTARRS) Classification: Comet          SPK-ID: 1003143 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2455807.5 (2011-Sep-03.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .9979360253883427 9.3543e-05   a 3284.971133581634 148.89 AU q 6.780097019739607 7.1045e-05 AU i 94.86144763630888 0.0003419 deg node 142.2443519658883 0.00027825 deg peri 135.9251922080855 0.0048731 deg M .0003432040635127057 2.3158e-05 deg tp 2455741.938982718995 (2011-Jun-29.43898272) 0.06108 JED period 68769483.61157162 188280.58 4.6756e+06 1.28e+04 d yr n 5.234880081888879E-6 3.5591e-07 deg/d Q 6563.162170143528 297.48 AU   Orbit Determination Parameters    # obs. used (total)      58      data-arc span      313 days      first obs. used      2011-08-17      last obs. used      2012-06-25      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      fit RMS      .38228      data source      ORB      producer      Otto Matic      solution date      2012-Jul-01 10:50:18   Additional Information  Earth MOID = 6.01835 AU   T_jup = -0.272  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 7.5 mag 0.8 11 from 28 observations, assumed slope, autocmod 2.5b comet total magnitude slope K1 10.   n/a 11 autocmod 2.5b comet nuclear magnitude M2 11.3 mag 0.4 11 from 10 observations, autocmod 2.5b comet nuclear magnitude slope K2 5.   n/a 11 autocmod 2.5b comet nuclear phase coefficient PC 0.03   n/a 11 autocmod 2.5b Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2011.5   C/2011 Q1        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2013-May-20 17:30 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin