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JPL Small-Body Database Browser
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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 K172/11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6855247615486663 5.6764e-07  
a 3.091427320901925 6.1658e-06 au
q .9721773438956006 6.3783e-07 au
i 11.23693587876469 2.6066e-05 deg
node 69.66173403110609 0.00011168 deg
peri 199.3892328579607 0.00012281 deg
M 354.7700622058644 1.9269e-05 deg
tp 2457829.342374429939
(2017-Mar-16.84237443)
5.4231e-05 TDB
period 1985.34957842537
5.44
0.0059396
1.626e-05
d
yr
n .1813282677832107 5.4249e-07 deg/d
Q 5.21067729790825 1.0393e-05 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 5.245232949339103E-9 1.804E-10
A2 [EST] 5.786918675230804E-10 7.484E-11
  Orbit Determination Parameters
   # obs. used (total)      984  
   data-arc span      2549 days (6.98 yr)  
   first obs. used      2011-01-01  
   last obs. used      2017-12-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .63456  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2019-May-15 16:04:47  

Additional Information
 Earth MOID = .014443 au 
 Jupiter MOID = .202004 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 13.1   1. K172/11 2 parameter fit from 256 observations, autocmod 2.6q
comet total magnitude slope K1 8.   n/a K172/11 autocmod 2.6q

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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