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129P/Shoemaker-Levy 3
Classification: Encke-type Comet          SPK-ID: 1000180
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2455708.5 (2011-May-27.0) TDB
Reference: JPL K223/7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1359066129019424 1.4226e-07  
a 4.279620414777564 3.8024e-07 au
q 3.697991699699139 8.9457e-07 au
i 3.551575310246609 1.0148e-05 deg
node 187.8303848254882 0.00022333 deg
peri 312.8166297006061 0.00023263 deg
M 249.2497373754698 7.1069e-05 deg
tp 2456703.329297488513
(2014-Feb-14.82929749)
0.00051445 TDB
period 3233.748964641643
8.85
0.00043097
1.18e-06
d
yr
n .1113258957130874 1.4837e-08 deg/d
Q 4.861249129855988 4.3191e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -3.133467548038956E-8 1.869E-9
  Orbit Determination Parameters
   # obs. used (total)      595  
   data-arc span      6609 days (18.09 yr)  
   first obs. used      2002-11-04  
   last obs. used      2020-12-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .73227  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Jan-19 12:48:06  

Additional Information
 Earth MOID = 2.71241 au 
 Jupiter MOID = .283393 au 
 T_jup = 3.009 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 14.3   1. K223/7 2 parameter fit from 373 observations, autocmod 2.9a
comet total magnitude slope K1 4.5   n/a K223/7 autocmod 2.9a

129P/Shoemaker-Levy 3          Discovered 1991-Feb-07 by Shoemaker, Carolyn & Eugene, & Levy, D.H. at Palomar Mountain Observatory, California
discovered on plate/photo taken on discovery date
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1996.4   129P/1996 U1       
 1987.6   129P/1991 C1   1990 XXVII   1991e 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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