+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   64P/Swift-Gehrels Classification: Jupiter-family Comet          SPK-ID: 1000090 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2017-Dec-08.0] K183/6 (default) [epoch=1991-Mar-05.0] SAO/1991 [epoch=1990-Apr-16.0] K004/1 [epoch=1981-Nov-12.0] SAO/1981 [epoch=1972-Aug-31.0] SAO/1972 [epoch=1889-Nov-14.0] SAO/1889 Orbital Elements at Epoch 2458095.5 (2017-Dec-08.0) TDB Reference: JPL K183/6 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .6873194552330496 8.0813e-08   a 4.45615537651515 1.243e-07 au q 1.393353090694932 3.9089e-07 au i 8.948390092799494 3.2625e-06 deg node 300.0009854543124 2.8451e-05 deg peri 97.14410525137997 4.1965e-05 deg M 325.3282087274894 4.1333e-06 deg tp 2458426.412134983940 (2018-Nov-03.91213498) 3.2417e-05 TDB period 3435.88733728531 9.41 0.00014376 3.936e-07 d yr n .104776427356444 4.3838e-09 deg/d Q 7.518957662335368 2.0973e-07 au Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] -4.288967091959609E-10 1.563E-10 A2 [EST] 4.992406544248472E-10 3.9E-12   Orbit Determination Parameters    # obs. used (total)      3425      data-arc span      6707 days (18.36 yr)      first obs. used      2000-12-22      last obs. used      2019-05-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44754      source      ORB      producer      Davide Farnocchia      solution date      2019-Sep-03 14:46:00   Additional Information  Earth MOID = .440161 au   Jupiter MOID = .649092 au   T_jup = 2.496  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 14.1   1. K183/6 2 parameter fit from 1127 observations, autocmod 2.8 comet total magnitude slope K1 8.   n/a K183/6 autocmod 2.8 diameter diameter 3.2 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (to be published)   64P/Swift-Gehrels          Discovered 1889-Nov-16 by Swift, Lewis at Warner Observatory, Rochester, New York Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1990.6       1991 II   1991c   1981.2       1981 XIX   1981j   1971.8   64P/1973 C1   1972 VII   1973d   1887.1   64P/1889 W1   1889 VI   1889f  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-05 11:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin