+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   6P/d'Arrest Classification: Jupiter-family Comet          SPK-ID: 1000017 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2009-01-10.0] K085/10 (default) [epoch=2002-02-15.0] SAO/2002 [epoch=1995-07-22.0] SAO/1995 [epoch=1989-02-03.0] SAO/1989 [epoch=1982-09-28.0] SAO/1982 [epoch=1976-08-10.0] SAO/1976 [epoch=1970-05-14.0] SAO/1970 [epoch=1963-10-18.0] SAO/1963 [epoch=1950-06-08.0] SAO/1950 [epoch=1943-10-03.0] SAO/1943 [epoch=1923-09-18.0] SAO/1923 [epoch=1910-09-06.0] SAO/1910 [epoch=1897-06-05.0] SAO/1897 [epoch=1890-09-30.0] SAO/1890 [epoch=1877-05-21.0] SAO/1877 [epoch=1870-09-15.0] SAO/1870 [epoch=1857-11-22.0] SAO/1857 [epoch=1851-07-17.0] SAO/1851 [epoch=1678-07-03.0] SAO/1678 Orbital Elements at Epoch 2454841.5 (2009-Jan-10.0) TDB Reference: JPL K085/10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.6127725932831010746681 6.8161e-08   a 3.4953664084492062080755 4.9037e-07 AU q 1.3535016698691471059845 1.5877e-07 AU i 19.515058152217129361361 7.384e-06 deg node 138.9372240555536 1.1618e-05 deg peri 178.1263147955168 3.74e-05 deg M 22.32686360218781 4.9143e-06 deg tp 2454693.465579595856 (2008-Aug-14.96557960) 4.3849e-05 JED period 2386.917943112696 6.54 0.0005023 1.375e-06 d yr n .1508221097582167 3.1739e-08 deg/d Q 5.637231147029265 7.9086e-07 AU Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 3.587418997128921E-9 2.242E-11 A2 [EST] -7.337118937198674E-11 5.596E-12 A3 [EST] -6.750179310332464E-10 1.381E-11 DT [EST] 100.7173176365439 1.106   Orbit Determination Parameters    # obs. used (total)      2157      data-arc span      9794 days (26.81 yr)      first obs. used      1982-04-23      last obs. used      2009-02-14      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .6282      data source      ORB      producer      Nick Mastrodemos      solution date      2009-Feb-20 13:33:45   Additional Information  Earth MOID = .341595 AU   T_jup = 2.710  [ 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 11.1 mag 1. K085/10 2 parameter fit from 234 observations, autocmod 2.4a comet total magnitude slope K1 34.   n/a K085/10 autocmod 2.4a comet nuclear magnitude M2 16.4 mag 1. K085/10 from 1521 observations, autocmod 2.4a comet nuclear magnitude slope K2 5.   n/a K085/10 autocmod 2.4a comet nuclear phase coefficient PC 0.03   n/a K085/10 autocmod 2.4a diameter diameter 3.2 km n/a DASTCOM value unverified 6P/d'Arrest          Discovered 1851-Jun-28 by d'Arrest, Heinrich Louis at Leipzig, Germany Reference: comet.dis Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1989.0       1989 II   1987k   1982.5       1982 VII   1982e   1975.9       1976 XI   1976e   1969.4       1970 VII   1970d   1962.9       1963 VII   1963f   1949.8       1950 II   1950a   1943.3       1943 III     1923.7       1923 II   1923b   1910.6       1910 III   1910c   1897.5       1897 II   1897a   1891.0       1890 V   1890d   1877.9       1877 IV   1877d   1871.4       1870 III   1870c   1858.3   6P/1857 X1   1857 VII     1851.8   6P/1851 M1   1851 II     1675.3   6P/1678 R1   1678     [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-24 17:54 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin