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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 2457380.5 (2015-Dec-24.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4282051070326322 2.7859e-07  
a 3.462878805693899 3.9519e-07 au
q 1.980056416060709 1.1585e-06 au
i 8.514226706277981 5.2994e-06 deg
node 151.7278284466424 3.6654e-05 deg
peri 302.3246544406015 7.2209e-05 deg
M 333.0918387892916 6.9108e-05 deg
tp 2457556.428372674412
(2016-Jun-16.92837267)
0.00048066 JED
period 2353.71765713904
6.44
0.00040292
1.103e-06
d
yr
n .1529495260011698 2.6182e-08 deg/d
Q 4.945701195327088 5.6441e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.182837679399278E-9 4.861E-10
A2 [EST] -2.933809551282463E-9 3.88E-11
DT [EST] 123.3487583811394 9.409
  Orbit Determination Parameters
   # obs. used (total)      1973  
   data-arc span      4837 days (13.24 yr)  
   first obs. used      2002-08-19  
   last obs. used      2015-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .69356  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-Dec-14 12:54:33  

Additional Information
 Earth MOID = 1.01159 au 
 T_jup = 2.961 
[ 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. 52 2 parameter fit from 547 observations, autocmod 2.6
comet total magnitude slope K1 12.   n/a 52 autocmod 2.6
comet nuclear magnitude M2 13.9 mag 0.8 52 from 1216 observations, autocmod 2.6
comet nuclear magnitude slope K2 5.   n/a 52 autocmod 2.6
comet nuclear phase coefficient PC 0.03   n/a 52 autocmod 2.6
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
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-13 00:52 00:41 Jupiter 1.05125048847823 1.05041813155274 1.05208253330868 5.42725804212708 5.27671041333475 2415366.536136067 41.0308308063163 7047.82900276675 61.810692819327 -22.2773905370087 86564.9945498829 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02
1949-Apr-25 16:27 00:22 Jupiter 0.654916946968561 0.65485888980842 0.654975015020751 3.9008734265738 3.55389324732916 2433032.185327044 22.101343095935 491.686807015359 64.3299027171579 -44.7647873749376 69748.4950717175 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02
1960-Jun-28 07:27 00:09 Jupiter 1.51206932607904 1.51191073328801 1.51222790680373 6.73881743561452 6.65517179688088 2437113.810093868 8.89010212672494 1626.08000790803 38.868794084188 -15.0046846728542 168558.476795655 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02
2020-Jul-26 16:25 00:03 Jupiter 0.66057647212694 0.660566964232169 0.660585980278816 4.33748760415681 4.03104251515763 2459057.183815185 3.16758404197878 81.9414767345207 11.4672389321269 -45.170365824224 442966.681120005 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02
2032-Jan-12 22:12 00:11 Jupiter 0.822211923118026 0.822141288801233 0.822282554120546 3.971750269308 3.70330249310903 2463244.424701921 10.7911639151622 333.900368463748 15.7493586488796 -18.2007887761836 159812.269010812 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02
2091-Jun-20 10:45 00:18 Jupiter 1.97646724369228 1.97602526886541 1.97690913059452 8.30233159878609 8.25055164268634 2484952.948042303 18.3023296609061 5764.85944439828 235.796961666632 -6.84879061860745 21562.4233918061 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02
2103-Aug-06 13:07 00:47 Jupiter 0.532917566396957 0.532738312060218 0.533096890844227 3.59734085886576 3.12442774535419 2489382.046475340 47.0035288679575 635.982864891818 100.734160891967 50.3798731455354 36446.1688809818 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02
2150-Nov-22 21:11 02:38 Jupiter 1.60416347177361 1.59850105526373 1.60980793552533 6.99187708179276 6.91594642489574 2506657.382325722 158.444333322162 58249.273387835 362.992046240827 -6.43392132203083 8470.17483290594 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02
2162-Aug-29 18:16 00:49 Jupiter 1.36584910891534 1.3631942182584 1.36849927635144 5.57554323596238 5.46318545128625 2510955.261346658 48.5745604345386 22565.3684592547 51.0061805231673 -8.89764217489249 56464.1821315598 T 52 CATAB v2.0c-linF95 2015-Dec-14 13:02:03 2015-Dec-14 13:02

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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