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118P/Shoemaker-Levy 4
Classification: Jupiter-family Comet          SPK-ID: 1000150
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456140.5 (2012-Aug-01.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4281755715853681 8.2427e-08  
a 3.465487939578648 2.5422e-07 AU
q 1.981650660227361 3.5693e-07 AU
i 8.508415201215824 5.0467e-06 deg
node 151.7701853727449 3.7691e-05 deg
peri 302.1741670545564 5.244e-05 deg
M 143.7890253725979 2.1414e-05 deg
tp 2455199.329613667630
(2010-Jan-02.82961367)
8.6327e-05 JED
period 2356.378299398522
6.45
0.00025928
7.099e-07
d
yr
n .1527768270875232 1.6811e-08 deg/d
Q 4.949325218929935 3.6307e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 4.309324519344644E-9 1.007E-10
A2 [EST] -1.799045336590839E-9 5.244E-12
  Orbit Determination Parameters
   # obs. used (total)      2065  
   data-arc span      6237 days (17.08 yr)  
   first obs. used      1995-06-22  
   last obs. used      2012-07-19  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .88149  
   data source      ORB  
   producer      Alan B. Chamberlin  
   solution date      2012-Aug-02 17:03:34  

Additional Information
 Earth MOID = 1.01474 AU 
 T_jup = 2.960 
[ 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 10.4 mag 1. 49 2 parameter fit from 548 observations, autocmod 2.5b
comet total magnitude slope K1 13.   n/a 49 autocmod 2.5b
comet nuclear magnitude M2 13.9 mag 0.8 49 from 1194 observations, autocmod 2.5b
comet nuclear magnitude slope K2 5.   n/a 49 autocmod 2.5b
comet nuclear phase coefficient PC 0.03   n/a 49 autocmod 2.5b
diameter diameter 4.8 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

118P/Shoemaker-Levy 4          Discovered 1991-Feb-09 by Shoemaker, Carolyn & Eugene, & Levy, D. H. at Palomar Mountain Observatory, California (675)
discovered on plate/photo taken on discovery date as well as 2/11
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
1900-Dec-12 19:36 00:17 Jupiter 1.05236748496548 1.05192427139128 1.05281061120634 5.4326297896858 5.28239715892505 2415366.316729518 17.1290581694982 3661.627095788 16.3470745655987 -22.4269226004727 330051.759800515 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
1949-Apr-25 13:33 00:11 Jupiter 0.654783626094152 0.654764653713909 0.654802601405669 3.90049059446107 3.55339891759507 2433032.064720644 11.4015194013754 211.95714508677 15.7630909834795 -45.7671767859579 287824.385586402 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
1960-Jun-28 04:40 00:02 Jupiter 1.5123481581026 1.51226186670848 1.51243444613364 6.74022685511687 6.65661444022363 2437113.694671785 2.38105312041139 845.889150490653 8.10947873704187 -15.7275989932735 843697.067548141 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
2015-Dec-03 10:09 < 00:01 Vesta 0.0442646535744617 0.0442576619240366 0.0442716453932093 9.28448801072042 9.28448772119975 2457359.923290433 0.457891230163826 374.553837485374 50.4588232625319 -21.7466173038604 51275.6039815324 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
2020-Jul-26 16:58 00:01 Jupiter 0.660691563046207 0.660683658979779 0.660699467191451 4.33780152863459 4.03143570103643 2459057.207061192 1.47504730071427 58.2504653029776 6.22538881145405 -41.2374307286781 756060.066592648 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
2032-Jan-13 04:37 00:03 Jupiter 0.821822211690884 0.821793674724838 0.821850747907682 3.97005965583553 3.70135728456659 2463244.692926033 3.82397408522403 146.057678334813 11.9246926597675 -15.1117098761042 181399.096445628 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
2091-Jun-20 10:26 00:12 Jupiter 1.9776280164242 1.97736559902507 1.97789040234068 8.30416920507883 8.25243125868344 2484952.935077266 12.125163264556 3442.347122607 72.8807305937223 -6.03055788509649 59212.2268439321 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
2103-Aug-06 20:43 00:19 Jupiter 0.532643764637804 0.53256585520411 0.532721695354084 3.5969883392451 3.12376030942047 2489382.363518640 19.6931421495737 356.977629963491 30.8334749250536 56.6606866772552 128333.026397829 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
2150-Nov-22 23:13 01:33 Jupiter 1.60535565081596 1.60213137374521 1.60857409632401 6.99297120037619 6.91710924046207 2506657.467813108 93.5307058657239 33171.7652525302 98.0662042231134 -6.3175172030093 30764.873655388 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36
2162-Aug-30 08:01 00:23 Jupiter 1.36592419683287 1.36444810402888 1.36739881562605 5.57504170288834 5.46267984045974 2510955.834577925 23.9844490743879 12661.0421286679 6.60412959038228 -8.67729996219742 425052.771309231 T 49 CATAB v2.0c-linF95 2012-Aug-02 17:36:35 2012-Aug-02 17:36

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1997.1   118P/1995 M1       
 1990.7   118P/1991 C2   1990 XII   1991f 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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