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29P/Schwassmann-Wachmann 1
Classification: Jupiter-family Comet          SPK-ID: 1000079
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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:
Orbital Elements at Epoch 2455844.5 (2011-Oct-10.0) TDB
Reference: JPL K192/38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04437627102325774 1.9703e-08  
a 5.995791425538637 3.8584e-08 au
q 5.729720560240009 1.3226e-07 au
i 9.382089467013669 1.8427e-06 deg
node 312.5953452655655 1.0771e-05 deg
peri 50.20599591415733 2.4472e-05 deg
M 176.6034747286548 2.1785e-05 deg
tp 2453213.838642422106
(2004-Jul-27.33864242)
0.00032956 TDB
period 5362.511072803824
14.68
5.1764e-05
1.417e-07
d
yr
n .06713272851328055 6.4802e-10 deg/d
Q 6.261862290837264 4.0297e-08 au
  Orbit Determination Parameters
   # obs. used (total)      33010  
   data-arc span      8729 days (23.90 yr)  
   first obs. used      1997-03-04  
   last obs. used      2021-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .68783  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2021-Feb-02 23:49:37  

Additional Information
 Earth MOID = 4.73425 au 
 Jupiter MOID = .739139 au 
 T_jup = 2.984 
[ 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 8.6   1. K192/38 2 parameter fit from 6580 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a K192/38 autocmod 2.8
diameter diameter 60.4 km 7.4 Schambeau, C. A.; Fernandez, Y. R.; Lisse, C. M.; Samarasinha, N.; Woodney, L. M. (2015), Icarus 260, pp. 60-72  
geometric albedo albedo 0.033   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  

29P/Schwassmann-Wachmann 1          Discovered 1927-Nov-15 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 
 1989.9       1989 XV   
 1975.2       1974 II   
 1960.5       1957 IV   
 1945.8       1941 VI   
 1931.2   29P/1927 V1   1925 II   1927i 
 1901.8   29P/1902 E1   1908 IV   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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