+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   46P/Wirtanen Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000109 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2008-08-01.0] K073/13 (default) [epoch=1999-05-22.0] J973/32 [epoch=1997-03-13.0] SAO/1997 [epoch=1991-09-21.0] SAO/1991 [epoch=1986-03-31.0] SAO/1986 [epoch=1974-07-12.0] SAO/1974 [epoch=1967-12-16.0] SAO/1967 [epoch=1961-04-11.0] SAO/1961 [epoch=1954-08-06.0] SAO/1954 [epoch=1947-12-01.0] SAO/1947 Orbital Elements at Epoch 2454679.5 (2008-Aug-01.0) TDB Reference: JPL K073/13 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.6581045255110213876292 6.2724e-08   a 3.0927929625788861400792 1.413e-07 AU q 1.0574119174370819607133 1.855e-07 AU i 11.739497488131389602017 1.1029e-05 deg node 82.17175978824024 4.9228e-05 deg peri 356.340556123535 5.4052e-05 deg M 32.71045478768135 6.0105e-06 deg tp 2454498.986876455914 (2008-Feb-02.48687646) 2.7524e-05 JED period 1986.665269488824 5.44 0.00013614 3.727e-07 d yr n .1812081811309005 1.2418e-08 deg/d Q 5.128174007720689 2.3428e-07 AU Additional Model Parameters  Parameter Value Uncertainty (1-sigma)  A1 [EST] 3.702962232871687E-9 5.808E-11 A2 [EST] -1.307234620904696E-9 1.165E-11 A3 [EST] 8.00875738049421E-10 3.063E-11 DT [EST] -4.174593125582905 .6095   Orbit Determination Parameters    # obs. used (total)      1815      data-arc span      4746 days (12.99 yr)      first obs. used      1995-06-26      last obs. used      2008-06-23      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .80053      data source      ORB      producer      Nick Mastrodemos      solution date      2008-Aug-19 12:53:49   Additional Information  Earth MOID = .071863 AU   T_jup = 2.819  [ 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 12.3 mag 1. K073/13 2 parameter fit from 308 observations, autocmod 2.4a comet total magnitude slope K1 15.   n/a K073/13 autocmod 2.4a comet nuclear magnitude M2 15.9 mag 01. K073/13 from 1092 observations, autocmod 2.4a comet nuclear magnitude slope K2 5.   n/a K073/13 autocmod 2.4a comet nuclear phase coefficient PC 0.03   n/a K073/13 autocmod 2.4a diameter diameter 1.2 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264   46P/Wirtanen          Discovered 1948-Jan-15 by Wirtanen, Carl A. at Lick Observatory, California discovered on plate/photo taken on discovery date Reference: comet.dis Last Updated: 2003-08-29 [ 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 1912-Dec-31 21:25 00:10 Jupiter 0.554757585272552 0.554510916218938 0.555004212163315 6.62307328388096 6.38838261758597 2419768.392490239 10.5834526296719 1619.84587115527 73.8949289911194 -7.36412494437279 15997.0149744567 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 1923-Dec-24 22:32 00:17 Jupiter 0.518829263866831 0.518730986282715 0.518927558816242 5.52543340906909 5.22161701077323 2423778.439035836 17.7856722285522 793.963666548767 29.1776461060879 -43.6164534282399 167562.519099751 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 1934-Aug-22 12:55 00:29 Mars 0.0989467231757156 0.0987771516535695 0.0991168115443903 7.85536192781804 7.85499358845297 2427672.038611095 29.4914629789072 12172.3766032136 103.940754684279 52.5700690179389 95348.4721056042 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 1972-Apr-09 21:10 00:01 Jupiter 0.275388671317921 0.275372560471226 0.27540478205902 6.07403082133829 5.5445812014479 2441417.382127883 1.55506994513666 82.3552153687276 19.0723393831565 11.9285353407538 64827.3543595194 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 1984-Feb-25 22:43 00:01 Jupiter 0.466409104545502 0.466399787294802 0.466418421716106 6.34733794547105 6.05446924055439 2445756.446882890 1.99319227326298 60.568233846953 17.4351119277215 -11.1212527506559 142896.259183211 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 2018-Dec-16 15:38 00:01 Earth 0.0777811627038334 0.0777746170543394 0.0777877100971846 10.0756566023615 10.0722561408981 2458469.152067432 1.1316004441036 469.829756665351 47.9916912833927 60.7882000847016 142048.993233581 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 2042-Nov-25 10:09 00:02 Jupiter 0.563217365230075 0.563175767545267 0.563258961565183 6.80037402692735 6.57550660531758 2467213.923475235 2.69153846285121 283.460444196355 31.7305526402421 -1.27187869376974 33987.6854751806 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 2054-Nov-19 03:23 00:02 Jupiter 0.11646729933685 0.116459648586547 0.116474950255294 6.52013238234687 5.28837254012201 2471590.641017660 2.09745511920978 39.259233254616 9.37284365434825 -31.1393272738265 105797.675522855 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 2090-Aug-10 16:53 00:25 Jupiter 1.9848779585923 1.98424224315185 1.98551350473171 10.4366783283999 10.395709636522 2484639.203745749 25.9102681030516 9008.77671614458 96.0002512184107 -0.983000175131323 10174.7989944878 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 2115-Jun-07 18:08 00:24 Jupiter 0.86457589405772 0.864383002176823 0.864768861572577 5.52040979635882 5.33999344820094 2493705.256236385 24.9345478410608 2095.35445014552 54.8959263379772 43.8784879131235 149780.955932939 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 2151-Jan-13 10:53 00:05 Jupiter 1.34029611930111 1.34011220425189 1.34048002589518 7.43541193079728 7.34992633634246 2506708.953504467 5.69104403296991 2067.87963881082 125.050049506763 24.1290539475257 81526.2657402697 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 2161-Nov-11 21:07 00:12 Jupiter 1.90787560703797 1.90755453690608 1.90819663530894 10.52240455936 10.4801276484839 2510664.380211304 12.2015275574517 4509.48306616885 143.305251286337 6.58671904977022 40818.8822026066 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 2197-Mar-16 02:14 00:08 Jupiter 0.203241147629401 0.203114063991425 0.203368756996556 6.13441210601533 5.41256535771315 2523572.593325096 8.23392569032137 1787.4390813205 53.9539743700095 66.5118055630647 51784.4216702421 T K073/13 CATAB v2.0b-linF95 2008-Aug-19 13:05:04 2008-Aug-19 13:05 Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   1991.8       1991 XVI   1991s   1986.3       1986 VI   1985q   1975.5       1974 XI   1974i   1964.6       1967 XIV   1967k   1959.1       1961 IV   1960m   1953.7   46P/1954 R2   1954 XI   1954j   1948.3   46P/1948 A1   1947 XIII   1948b  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-26 04:19 UT (server date/time)   Site Manager:   Donald K. 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