+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   C/2012 F6 (Lemmon) Classification: Comet          SPK-ID: 1003183 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2456243.5 (2012-Nov-12.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .9984983672383251 3.394e-06   a 486.9720943870153 1.1025 AU q .7312532509529938 2.984e-06 AU i 82.60820096837482 5.2745e-05 deg node 332.7147451576856 2.2313e-05 deg peri 304.9878358360607 0.00027384 deg M 359.9878460990723 4.1283e-05 deg tp 2456376.015820652595 (2013-Mar-24.51582065) 0.00010057 JED period 3925134.46661427 10746.43 13330 36.5 d yr n 9.171660310290659E-5 3.1147e-07 deg/d Q 973.2129355230777 2.2034 AU   Orbit Determination Parameters    # obs. used (total)      376      data-arc span      409 days (1.12 yr)      first obs. used      2012-01-22      last obs. used      2013-03-06      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      fit RMS      .4813      data source      ORB      producer      Otto Matic      solution date      2013-Mar-09 14:50:31   Additional Information  Earth MOID = .0726927 AU   T_jup = 0.147  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 4.6 mag 0.7 21 2 parameter fit from 60 observations, autocmod 2.5b comet total magnitude slope K1 18.   n/a 21 autocmod 2.5b comet nuclear magnitude M2 12.4 mag 0.9 21 from 273 observations, autocmod 2.5b comet nuclear magnitude slope K2 5.   n/a 21 autocmod 2.5b comet nuclear phase coefficient PC 0.03   n/a 21 autocmod 2.5b Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2013.2   C/2012 F6        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2013-May-22 20:15 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin