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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 2456981.5 (2014-Nov-20.0) TDB
Reference: JPL 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08581175760258633 3.7093e-07  
a 4.280887802740065 1.5817e-06 AU
q 3.913537296287467 2.0631e-06 AU
i 3.442400338310652 1.6757e-05 deg
node 184.9023484291536 0.00049494 deg
peri 309.2863824668743 0.00039524 deg
M 31.55527943959996 0.00019854 deg
tp 2456697.924487941607
(2014-Feb-09.42448794)
0.0019329 JED
period 3235.185558613949
8.86
0.0017929
4.909e-06
d
yr
n .1112764611110081 6.167e-08 deg/d
Q 4.648238309192664 1.7174e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.277458701685935E-8 4.802E-9
A2 [EST] -2.70392991708146E-8 4.29E-10
A3 [EST] -1.215167100815163E-8 2.522E-9
DT [EST] 252.4145120358114 26.19
  Orbit Determination Parameters
   # obs. used (total)      590  
   data-arc span      8430 days (23.08 yr)  
   first obs. used      1991-02-07  
   last obs. used      2014-03-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .79383  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Nov-10 13:42:36  

Additional Information
 Earth MOID = 2.92831 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 11.9 mag 0.9 63 2 parameter fit from 348 observations, autocmod 2.6
comet total magnitude slope K1 9.   n/a 63 autocmod 2.6

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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