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JPL Small-Body Database Browser
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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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:
Orbital Elements at Epoch 2455603.5 (2011-Feb-11.0) TDB
Reference: JPL K192/23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04480512052532885 2.1646e-08  
a 5.992954762780372 4.4885e-08 au
q 5.724439702331154 1.5224e-07 au
i 9.38673748699293 1.9884e-06 deg
node 312.619275976853 1.0788e-05 deg
peri 49.7066403435247 2.4602e-05 deg
M 160.9284621119264 2.197e-05 deg
tp 2453208.032481671891
(2004-Jul-21.53248167)
0.00032942 TDB
period 5358.705944746669
14.67
6.0202e-05
1.648e-07
d
yr
n .06718039834839619 7.5474e-10 deg/d
Q 6.26146982322959 4.6896e-08 au
  Orbit Determination Parameters
   # obs. used (total)      29943  
   data-arc span      8416 days (23.04 yr)  
   first obs. used      1997-03-04  
   last obs. used      2020-03-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .7038  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2020-Apr-07 11:05:28  

Additional Information
 Earth MOID = 4.72845 au 
 Jupiter MOID = .73475 au 
 T_jup = 2.984 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 4.685420451766516E-16 -3.184228629755293E-15 -1.038230374348377E-12 1.644206095708215E-15 -9.764368233673976E-14 2.235276552190268E-16
q -3.184228629755293E-15 2.317614153277397E-14 4.395339435661932E-12 1.949284528497508E-15 5.375008250094435E-13 -3.686820141485264E-15
tp -1.038230374348377E-12 4.395339435661932E-12 1.085149816253574E-7 9.438091661166303E-11 7.282042142416858E-9 1.985543599449296E-11
node 1.644206095708215E-15 1.949284528497508E-15 9.438091661166303E-11 1.163765273802347E-10 -1.068801308995626E-10 2.761541326425723E-12
peri -9.764368233673976E-14 5.375008250094435E-13 7.282042142416858E-9 -1.068801308995626E-10 6.05272430768517E-10 -1.567785085821603E-12
i 2.235276552190268E-16 -3.686820141485264E-15 1.985543599449296E-11 2.761541326425723E-12 -1.567785085821603E-12 3.953784056836125E-12

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 8.5   1. K192/23 2 parameter fit from 4439 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a K192/23 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

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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 
 1901.9   29P/1902 E1   1908 IV   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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