Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
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 ]
:
Orbital Elements at Epoch 2456717.5 (2014-Mar-01.0) TDB
Reference: JPL K073/15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6592377673949141 5.3026e-07  
a 3.087639625198431 1.3881e-06 AU
q 1.052150972162548 1.7075e-06 AU
i 11.75732764244069 2.5325e-05 deg
node 82.16308154846983 0.00011875 deg
peri 356.3388074097285 0.00030253 deg
M 42.62165449714421 0.0001617 deg
tp 2456482.879401092346
(2013-Jul-09.37940109)
0.00073368 JED
period 1981.701944780552
5.43
0.0013363
3.659e-06
d
yr
n .1816620309366782 1.225e-07 deg/d
Q 5.123128278234314 2.3032e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.660092361049982E-9 1.109E-10
A2 [EST] -1.295197065844719E-9 4.426E-11
A3 [EST] 7.326477956321053E-10 6.601E-11
DT [EST] -9.684893951452532 3.558
  Orbit Determination Parameters
   # obs. used (total)      1519  
   data-arc span      4251 days (11.64 yr)  
   first obs. used      2002-06-23  
   last obs. used      2014-02-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      2  
   fit RMS      .83795  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Feb-19 14:53:17  

Additional Information
 Earth MOID = .06741 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 12.7 mag 1. K073/15 2 parameter fit from 264 observations, autocmod 2.5c
comet total magnitude slope K1 14.   n/a K073/15 autocmod 2.5c
comet nuclear magnitude M2 15.9 mag 01. K073/15 from 1089 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a K073/15 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a K073/15 autocmod 2.5c
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.disLast 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 12:29 01:32 Jupiter 0.549173817665267 0.546792086688076 0.551551558707533 6.60996759852021 6.37235875270967 2419768.020122753 92.0808740135514 15664.8306221838 222.763414743296 -7.95179559571904 5349.21007566831 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
1923-Dec-24 02:24 02:20 Jupiter 0.521035588499457 0.520131430592748 0.521941218190486 5.5320860514953 5.2299782216578 2423777.600217992 139.613001635342 7243.77855706758 78.5995619027955 -43.6954527318725 62594.3287272131 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
1972-Apr-09 20:56 00:07 Jupiter 0.275579480778631 0.275509913963275 0.275649050502197 6.07429262002092 5.54525206833008 2441417.372273585 7.17569824122494 430.461517415247 75.5999443311498 32.1610103792896 29746.2408620833 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
1984-Feb-25 22:07 00:12 Jupiter 0.466404510397592 0.466287348024976 0.466521664734563 6.347484806105 6.05462025776295 2445756.421332356 11.5722969252495 697.731110918128 67.5981602398302 -9.50281186427921 20000.7560261965 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
2018-Dec-16 14:50 00:07 Earth 0.0776751053739213 0.0776344644154651 0.0777158091645124 10.0731608043374 10.0697548551304 2458469.118335030 6.50150237457454 2786.67750884946 134.321303910908 59.133352780804 49775.7637387613 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
2042-Nov-25 12:43 00:12 Jupiter 0.562309554808163 0.562098332730793 0.562520736669419 6.79779392204496 6.57246883616329 2467214.030097516 11.9501126913904 1491.3850895252 246.518894358577 -2.19441365222436 6498.39987499583 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
2054-Nov-19 03:54 00:04 Jupiter 0.116584335526508 0.116538083720539 0.116630591745653 6.51903808425531 5.28840404578394 2471590.662201966 3.95950101013373 253.28756964399 47.3637365611521 -31.0167889455043 20259.971304491 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
2090-Aug-10 09:46 01:49 Jupiter 1.98070152089276 1.97765113098013 1.98374809988414 10.4250450440171 10.3839438027175 2484638.907130628 109.382048979521 42257.2777899289 308.773394982897 -0.453143082552997 1621.96237798017 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
2115-Jun-08 08:49 02:27 Jupiter 0.865800441561363 0.864935571545793 0.866666927985249 5.527264922411 5.34733901602071 2493705.867241750 146.610747131833 9641.64486103803 288.561288525525 43.8579684312891 28563.0503248432 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
2151-Jan-13 16:12 00:52 Jupiter 1.34135640699349 1.34049680462908 1.34221578362725 7.44002517222656 7.35466112413846 2506709.175049216 52.4668156929327 9631.89195206669 636.961391433364 22.6234378941247 15127.926784042 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
2161-Nov-12 01:55 01:16 Jupiter 1.90782476028656 1.90653290085395 1.90911588124438 10.5220228740497 10.479743295356 2510664.579667629 75.6033280529211 19339.2877164607 579.409951299119 4.88387679935059 7629.04562451344 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02
2197-Mar-16 04:41 00:19 Jupiter 0.204535213299134 0.203927820923816 0.205151423171262 6.13687337295402 5.42022159850218 2523572.695122600 18.513627682102 7600.60346469723 216.677633181374 63.3885868241937 12649.1948145592 T K073/15 CATAB v2.0c-linF95 2014-Feb-19 15:02:03 2014-Feb-19 15:02

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1991.8       1991 XVI   1991s 
 1986.4       1986 VI   1985q 
 1975.5       1974 XI   1974i 
 1964.7       1967 XIV   1967k 
 1959.3       1961 IV   1960m 
 1953.8   46P/1954 R2   1954 XI   1954j 
 1948.4   46P/1948 A1   1947 XIII   1948b 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-24 05:53 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin