+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   18D/Perrine-Mrkos Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000144 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=1969-01-19.0] J682/18 (default) [epoch=1962-02-25.0] SAO/1962 [epoch=1955-10-20.0] SAO/1955 [epoch=1909-10-21.0] SAO/1909 [epoch=1896-11-17.0] SAO/1896 Orbital Elements at Epoch 2440240.5 (1969-Jan-19.0) TDB Reference: JPL J682/18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.642580982439164 7.5964e-07   a 3.55954221481951 4.0587e-07 AU q 1.27224808138711 2.587e-06 AU i 17.7589827722319 0.00011715 deg node 240.8755466309168 0.00012112 deg peri 166.0504171249452 0.00036915 deg M 11.51461302314525 6.2953e-05 deg tp 2440162.042133371453 (1968-Nov-01.54213337) 0.00043205 JED period 2452.955381957053 6.72 0.00041954 1.149e-06 d yr n .1467617400006597 2.5101e-08 deg/d Q 5.84683634825191 6.6667e-07 AU   Orbit Determination Parameters    # obs. used (total)      16      data-arc span      2584 days (7.07 yr)      first obs. used      1961-11-29      last obs. used      1968-12-26      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      1      fit RMS      1.6514      data source      ORB      producer      M.S.W. Keesey      solution date      2002-Feb-22 17:02:43   Additional Information  Earth MOID = .28923 AU   T_jup = 2.669  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 11.5 mag n/a ICQ 2002 Handbook   comet total magnitude slope K1 20.0   n/a ICQ 2002 Handbook   comet nuclear magnitude M2 15.5 mag n/a ICQ 2002 Handbook   comet nuclear magnitude slope K2 15.0   n/a ICQ 2002 Handbook   [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (AU) Minimum Distance (AU) Maximum Distance (AU) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1909-Sep-23 23:43 00:57 Mars 0.391521533777658 0.390932513683371 0.392113761335063 15.8437038782048 n/a 2418573.4885 57.1506343956129 60562.4831512011 311.067668880638 -59.7887039600379 155148.866659635 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 1909-Nov-14 23:27 00:40 Earth 0.209443903633803 0.208808990313854 0.210085704830087 10.2591598324075 n/a 2418625.47718 40.1660131695775 46198.9166257859 190.666558454421 61.7920683341766 98057.169622689 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 1947-Sep-06 23:14 00:11 Jupiter 1.62478616018279 1.62467937863321 1.62489293638322 10.9847280956361 n/a 2432435.46818 11.5897381885529 1692.04478972303 76.7449117073275 -10.430945482364 106409.00066433 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 1959-Jun-13 19:44 00:10 Jupiter 0.381609106424924 0.381553130691198 0.381665087491249 6.45064544576019 n/a 2436733.32277 10.80378114012 353.214800614737 42.1474311506892 39.3957899018124 92078.2728275725 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 1968-Nov-14 03:06 < 00:01 Earth 0.314449154988512 0.314440778464943 0.314457531481612 10.3941828310495 n/a 2440174.62943 0.596068003658546 325.387935277583 70.2746277526832 10.6498390963992 128441.311717304 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 2006-Dec-30 08:09 00:07 Jupiter 0.138926818977164 0.138882686243423 0.138970961441068 7.29201264875208 n/a 2454099.84026 7.05498953058918 324.323676065854 109.880196362731 48.0323628819219 17301.8257445507 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 2017-Mar-29 11:40 00:42 Mars 0.391516371525608 0.39005810242176 0.392975131864265 11.6789246784373 n/a 2457841.98617 42.7920919140356 73501.9358406496 2214.96591384642 -19.4072944863814 8104.19285322769 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 2030-Sep-07 12:17 00:09 Jupiter 0.271583105709155 0.26943425780466 0.273729713826336 7.74244780836599 n/a 2462752.01185 9.68095186434779 14325.904452648 60.4691866043739 -8.68977774069746 11940.3120678846 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 2039-Aug-16 21:51 1_09:04 Mars 0.251346774828008 0.23702829586792 0.266989294680536 12.868863316966 n/a 2466017.41052 1984.32180541257 1126811.28618864 818.466986412053 -49.3985099763063 32504.9564095577 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 2041-Jun-06 14:35 04:42 Jupiter 1.92551883629563 1.90812128882101 1.94283079551999 10.667881561411 n/a 2466677.10819 282.693700260845 244342.23993435 1324.15349582479 16.5428631445279 10888.6435077247 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 2065-Dec-30 19:46 1_06:23 Jupiter 1.88540700782411 1.83644495036431 1.93342859128516 11.5967683724592 n/a 2475650.32405 1823.6894032615 717092.988334288 346.519322776949 -2.50040005108616 6592.86954144241 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 2076-Dec-28 05:37 1_07:29 Jupiter 0.930805614525998 0.91627567754367 0.946553378703489 6.83808771274863 n/a 2479665.73454 1889.44932297066 253914.564606479 605.410935151423 54.7044059682883 21337.4985288723 T J682/18 CATAB v2.0-linF95 2002-Aug-02 15:53:06 2004-Feb-02 11:16 Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1968.8       1968 VIII   1968h   1962.1       1962 I   1961h   1955.4   18D/1955 U1   1955 VII   1955i   1908.4   18D/1909 P1   1909 III   1909b   1895.0   18D/1896 X1   1896 VII   1896g  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ] 2013-May-23 02:04 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin