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321P/SOHO
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1001745
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2453458.5 (2005-Mar-29.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9806622598929796 4.2722e-05  
a 2.426630333940908 3.1552e-06 au
q .04692554673356136 0.00010364 au
i 19.7374973886756 0.11934 deg
node 165.2697242662736 0.24038 deg
peri 172.4054964658867 0.29229 deg
M 28.9877386928496 0.00069712 deg
tp 2453347.322808963121
(2004-Dec-07.82280896)
0.002881 TDB
period 1380.714418512027
3.78
0.0026929
7.373e-06
d
yr
n .260734584337843 5.0853e-07 deg/d
Q 4.806335121148254 6.2494e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -1.801937902799808E-12 9.137E-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      3  
   norm. resid. RMS      .10611  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:28:23  

Additional Information
 Earth MOID = .0859584 au 
 Jupiter MOID = .677881 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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