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C/2011 S2 (Kowalski)
Classification: Halley-type Comet* [NEO]          SPK-ID: 1003152
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455857.5 (2011-Oct-23.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9316148499421462 2.3361e-05  
a 16.30646930045959 0.0056661 au
q 1.115120350025716 6.7219e-06 au
i 17.57253785793546 6.2756e-05 deg
node 288.0703246751929 0.00038759 deg
peri 192.1899849795159 0.0004102 deg
M 359.9498905962923 2.025e-05 deg
tp 2455860.847765786202
(2011-Oct-26.34776579)
0.00042019 TDB
period 24051.28765978537
65.85
12.536
0.03432
d
yr
n .01496801356718763 7.8015e-06 deg/d
Q 31.49781825089347 0.010945 au
  Orbit Determination Parameters
   # obs. used (total)      343  
   data-arc span      180 days  
   first obs. used      2011-09-30  
   last obs. used      2012-03-28  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .67406  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:31:56  

Additional Information
 Earth MOID = .137793 au 
 Jupiter MOID = 1.05404 au 
 T_jup = 1.546 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 15.6   0.7 17 2 parameter fit from 131 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 17 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2011.8   C/2011 S2       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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