+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   67P/Churyumov-Gerasimenko Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000012 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2013-03-13.0] K084/14 (default) [epoch=2002-09-03.0] SAO/2002 [epoch=1995-12-29.0] SAO/1996 [epoch=1989-06-03.0] SAO/1989 [epoch=1982-11-07.0] SAO/1982 [epoch=1976-04-12.0] SAO/1976 [epoch=1969-09-16.0] SAO/1969 Orbital Elements at Epoch 2456364.5 (2013-Mar-13.0) TDB Reference: JPL K084/14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6411889611380622 3.2757e-08   a 3.463889153077574 1.5827e-07 AU q 1.242881665518362 1.4587e-07 AU i 7.044033863175343 8.9794e-06 deg node 50.1720552341185 8.3079e-05 deg peri 12.73650673253869 8.4362e-05 deg M 225.0378349463 1.5494e-05 deg tp 2457247.282959700190 (2015-Aug-12.78295970) 0.0001605 JED period 2354.747831480167 6.45 0.00016139 4.419e-07 d yr n .1528826123915392 1.0478e-08 deg/d Q 5.684896640636786 2.5975e-07 AU Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 9.297767227922673E-10 3.13E-11 A2 [EST] 1.031296480630282E-10 8.082E-13 A3 [EST] 1.577975795036645E-10 3.904E-11   Orbit Determination Parameters    # obs. used (total)      2629      data-arc span      8727 days (23.89 yr)      first obs. used      1988-07-06      last obs. used      2012-05-28      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .79178      data source      ORB      producer      Ryan S. Park      solution date      2013-Mar-03 19:24:56   Additional Information  Earth MOID = .255674 AU   T_jup = 2.745  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 11.4 mag 1. K084/14 2 parameter fit from 496 observations, autocmod 2.5b comet total magnitude slope K1 11.   n/a K084/14 autocmod 2.5b diameter diameter 4.0 km n/a Lamy,P.L.;Toth,I.;Fernandez,Y.R.;Weaver,H.A. (2004) Comets II, pp. 223-264   rotation period rot_per 12.76137 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Lowry, S.; Duddy, S.R.; Rozitis, B.; Green, S.F.; et al. (2012) Astron. Astrophys. 548, A12.] 67P/Churyumov-Gerasimenko          Discovered 1969-Oct-22 by Churyumov, Klim Ivanovic at Alma-Ata Observatory, Russia discovered on plate/photo taken on 9/11 Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1989.8       1989 VI   1988i   1983.4       1982 VIII   1982f   1976.9   67P/1975 P1   1976 VII   1975i   1970.5   67P/1969 R1   1969 IV   1969h  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-24 09:32 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin