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73P/Schwassmann-Wachmann 3
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000394
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457800.5 (2017-Feb-16.0) TDB
Reference: JPL K223/1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6855236514795381 3.8385e-07  
a 3.091416025979679 4.8391e-06 au
q .9721772236077267 6.0931e-07 au
i 11.23693112176631 2.535e-05 deg
node 69.66171061633882 0.00010922 deg
peri 199.3892656094352 0.00011589 deg
M 354.7700290224664 1.7531e-05 deg
tp 2457829.342399361957
(2017-Mar-16.84239936)
4.545e-05 TDB
period 1985.338697845151
5.44
0.0046615
1.276e-05
d
yr
n .1813292615465247 4.2576e-07 deg/d
Q 5.210654828351631 8.1563e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.454960294973172E-9 1.677E-10
A2 [EST] 4.64168201143949E-10 2.719E-11
  Orbit Determination Parameters
   # obs. used (total)      990  
   data-arc span      3665 days (10.03 yr)  
   first obs. used      2011-01-01  
   last obs. used      2021-01-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .63315  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Feb-01 11:34:56  

Additional Information
 Earth MOID = .014443 au 
 Jupiter MOID = .202013 au 
 T_jup = 2.784 
[ 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 13.8   1. K223/1 2 parameter fit from 275 observations, autocmod 2.9a
comet total magnitude slope K1 6.5   n/a K223/1 autocmod 2.9a

73P/Schwassmann-Wachmann 3          Discovered 1930-May-02 by Schwassmann, A. and Wachmann, A. A. at Hamburg Observatory, Germany
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 
 1995.5           1994w 
 1990.0       1990 VIII   1989d1 
 1979.2   73P/1979 P1   1979 VIII   1979g 
 1930.2   73P/1930 J1   1930 VI   1930d 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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