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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 2455711.5 (2011-May-30.0) TDB
Reference: JPL K192/34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04465727036459703 2.0664e-08  
a 5.994034963335272 4.1729e-08 au
q 5.726357723402762 1.4224e-07 au
i 9.384716906443401 1.9273e-06 deg
node 312.6103628957088 1.0783e-05 deg
peri 49.93478350379144 2.4497e-05 deg
M 167.9484413138298 2.1839e-05 deg
tp 2453210.862086144436
(2004-Jul-24.36208614)
0.00032884 TDB
period 5360.154830528178
14.68
5.5974e-05
1.532e-07
d
yr
n .06716223903639112 7.0135e-10 deg/d
Q 6.261712203267783 4.3593e-08 au
  Orbit Determination Parameters
   # obs. used (total)      31279  
   data-arc span      8628 days (23.62 yr)  
   first obs. used      1997-03-04  
   last obs. used      2020-10-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .69755  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2020-Oct-19 09:31:20  

Additional Information
 Earth MOID = 4.72958 au 
 Jupiter MOID = .736375 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. K192/34 2 parameter fit from 5506 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a K192/34 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   
 1945.9       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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