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

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457164.5 (2015-May-22.0) TDB
Reference: JPL 64 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08529992366081832 2.9693e-07  
a 4.278372420557185 1.1386e-06 AU
q 3.913427579691106 8.5923e-07 AU
i 3.443725260308987 1.2431e-05 deg
node 184.8973514877388 0.00031521 deg
peri 309.1197468250286 0.00029343 deg
M 52.12035466433725 0.00014905 deg
tp 2456696.526600728640
(2014-Feb-08.02660073)
0.0015095 JED
period 3232.3345614715
8.85
0.0012903
3.533e-06
d
yr
n .1113746096369777 4.4461e-08 deg/d
Q 4.643317261423263 1.2357e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.183371041189053E-8 4.805E-9
A2 [EST] -2.605946239964431E-8 4.108E-10
A3 [EST] -5.45380015339165E-9 1.938E-9
DT [EST] 251.3156879607616 27.61
  Orbit Determination Parameters
   # obs. used (total)      652  
   data-arc span      8844 days (24.21 yr)  
   first obs. used      1991-02-07  
   last obs. used      2015-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .8367  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-May-12 21:21:10  

Additional Information
 Earth MOID = 2.92799 AU 
 T_jup = 3.020 
[ 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 12.9 mag 0.9 64 2 parameter fit from 408 observations, autocmod 2.6
comet total magnitude slope K1 7.   n/a 64 autocmod 2.6

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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