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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 2456717.5 (2014-Mar-01.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08748030452997145 3.9323e-07  
a 4.288925572099323 1.6345e-06 AU
q 3.913729056945692 2.2747e-06 AU
i 3.438152991200658 1.6562e-05 deg
node 184.9511187917157 0.00050813 deg
peri 309.5004090029561 0.00040527 deg
M 1.94113471411002 0.00020586 deg
tp 2456700.006594346351
(2014-Feb-11.50659435)
0.0018645 JED
period 3244.301381834286
8.88
0.0018546
5.078e-06
d
yr
n .1109637970182846 6.3434e-08 deg/d
Q 4.664122087252954 1.7775e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.64568305508214E-8 4.84E-9
A2 [EST] -2.766777120388636E-8 3.834E-10
A3 [EST] -1.158787342255803E-8 2.559E-9
DT [EST] 237.2539291374667 25.54
  Orbit Determination Parameters
   # obs. used (total)      568  
   data-arc span      8398 days (22.99 yr)  
   first obs. used      1991-02-07  
   last obs. used      2014-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .78863  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Feb-19 12:02:38  

Additional Information
 Earth MOID = 2.92913 AU 
 T_jup = 3.019 
[ 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 11.5 mag 0.9 62 2 parameter fit from 336 observations, autocmod 2.5c
comet total magnitude slope K1 10.   n/a 62 autocmod 2.5c
comet nuclear magnitude M2 14.2 mag 0.8 62 from 87 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 62 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 62 autocmod 2.5c

129P/Shoemaker-Levy 3          Discovered 1991-Feb-07 by Shoemaker, Carolyn & Eugene, & Levy, D.H. at Palomar Mountain Observatory, California (675)
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       
 1987.5   129P/1991 C1   1990 XXVII   1991e 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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