+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   36P/Whipple Classification: Jupiter-family Comet          SPK-ID: 1000105 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2013-03-13.0] K118/3 (default) [epoch=1995-01-03.0] SAO/1994 [epoch=1986-06-19.0] SAO/1986 [epoch=1978-04-02.0] SAO/1978 [epoch=1970-10-21.0] SAO/1970 [epoch=1963-05-11.0] SAO/1963 [epoch=1955-11-29.0] SAO/1955 [epoch=1948-06-18.0] SAO/1948 [epoch=1941-01-06.0] SAO/1941 [epoch=1933-07-27.0] SAO/1933 [epoch=1926-02-14.0] SAO/1926 Orbital Elements at Epoch 2456364.5 (2013-Mar-13.0) TDB Reference: JPL K118/3 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2616807825108944 1.1072e-07   a 4.174188849361629 5.1698e-08 AU q 3.081883844912428 4.7356e-07 AU i 9.911549044236471 1.403e-05 deg node 182.1307521405317 5.589e-05 deg peri 201.1235367201848 6.5056e-05 deg M 51.17266879277977 2.0064e-05 deg tp 2455921.715781374469 (2011-Dec-26.21578137) 0.00017243 JED period 3114.989357906659 8.53 5.7869e-05 1.584e-07 d yr n .115570218269358 2.147e-09 deg/d Q 5.266493853810831 6.5226e-08 AU Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 4.994293202460825E-9 8.29E-10 A2 [EST] -4.866816428806503E-10 3.167E-11   Orbit Determination Parameters    # obs. used (total)      497      data-arc span      21078 days (57.71 yr)      first obs. used      1955-05-25      last obs. used      2013-02-07      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .78076      data source      ORB      producer      Ryan S. Park      solution date      2013-Mar-03 19:23:40   Additional Information  Earth MOID = 2.08549 AU   T_jup = 2.950  [ 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 7.5 mag n/a ICQ 2004 Handbook   comet total magnitude slope K1 17.0   n/a ICQ 2004 Handbook   diameter diameter 4.56 km n/a Lamy,P.L,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (To be published)   36P/Whipple          Discovered 1933-Oct-15 by Whipple, Fred L. at Harvard College Observatory, Oak Ridge, Mass discovered on plate/photo taken on discovery date Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1994.9       1994 XXXII   1993n   1986.4       1986 XII   1985h   1977.9       1978 VIII   1977h   1969.3       1970 XIV   1969c   1960.8       1963 II   1962f   1952.3       1955 VIII   1955d   1943.8   36P/1940 R1   1948 VI   1947g   1935.2   36P/1933 U1   1933 IV   1933f   1926.7   36P/1925 QD   1926 VIII    [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-21 23:47 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin