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JPL Small-Body Database Browser
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321P/SOHO
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1001745
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | 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 2453458.5 (2005-Mar-29.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9806622092195985 4.2717e-05  
a 2.426630318554877 3.1546e-06 au
q .04692566940159335 0.00010362 au
i 19.7363116677891 0.11933 deg
node 165.2691489466613 0.2404 deg
peri 172.4062039751661 0.29231 deg
M 28.9877348812234 0.00069701 deg
tp 2453347.322824639296
(2004-Dec-07.82282464)
0.0028805 TDB
period 1380.714405380414
3.78
0.0026923
7.371e-06
d
yr
n .2607345868176215 5.0842e-07 deg/d
Q 4.806334967708159 6.2481e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -1.796364315156547E-12 9.136E-13
  Orbit Determination Parameters
   # obs. used (total)      91  
   data-arc span      5539 days (15.16 yr)  
   first obs. used      1997-05-01  
   last obs. used      2012-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .106  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2017-Jun-08 17:45:18  

Additional Information
 Earth MOID = .0859577 au 
 Jupiter MOID = .677866 au 
 T_jup = 2.396 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ]

no physical parameters available

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2012.5   321P/2012 M2       
 2008.7   321P/2008 S2       
 2004.9   321P/2004 X7       
 2001.2   321P/2001 D1       
 1997.4   321P/1997 J6       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ]
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