+ View the NASA Portal + Center for Near-Earth Object Studies 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 2455825.5 (2011-Sep-21.0) TDB Reference: JPL 13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .9979126544659841 0.0001041   a 3248.18545625462 162.01 au q 6.780085405768498 9.2982e-05 au i 94.86201443804366 0.00038725 deg node 142.2439066896546 0.00030109 deg peri 135.9264482236275 0.0058653 deg M .0004447991305403581 3.3077e-05 deg tp 2455741.954881000737 (2011-Jun-29.45488100) 0.073491 TDB period 67617584.6009343 185126.86 5.0589e+06 1.385e+04 d yr n 5.324058854285454E-6 3.9832e-07 deg/d Q 6489.590827103472 323.68 au   Orbit Determination Parameters    # obs. used (total)      59      data-arc span      313 days      first obs. used      2011-08-17      last obs. used      2012-06-25      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      norm. resid. RMS      .38983      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 23:31:54   Additional Information  Earth MOID = 6.01858 au   Jupiter MOID = 2.63288 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   0.8 13 from 28 observations, assumed slope, autocmod 2.9c comet total magnitude slope K1 10.   n/a 13 autocmod 2.9c comet nuclear magnitude M2 11.3   0.4 13 from 10 observations, autocmod 2.9c comet nuclear magnitude slope K2 5.   n/a 13 autocmod 2.9c comet nuclear phase coefficient PC 0.03   n/a 13 autocmod 2.9c Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2011.5   C/2011 Q1        [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2021-Apr-20 01:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin