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391P/Kowalski
Classification: Jupiter-family Comet          SPK-ID: 1002328
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2454658.5 (2008-Jul-11.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1200454189913408 9.8932e-07  
a 4.681432537178965 1.1846e-06 au
q 4.119448006773621 3.6203e-06 au
i 21.27400343933849 2.1525e-05 deg
node 124.7611944342567 0.00011993 deg
peri 186.8918735870405 0.00032271 deg
M 13.81325819152878 0.00025949 deg
tp 2454516.541889695545
(2008-Feb-20.04188970)
0.0026604 TDB
period 3699.700606548048
10.13
0.0014043
3.845e-06
d
yr
n .09730517095433104 3.6933e-08 deg/d
Q 5.243417067584311 1.3268e-06 au
  Orbit Determination Parameters
   # obs. used (total)      256  
   data-arc span      5719 days (15.66 yr)  
   first obs. used      2005-05-10  
   last obs. used      2021-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .70445  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-14 17:13:24  

Additional Information
 Earth MOID = 3.10551 au 
 Jupiter MOID = .0547891 au 
 T_jup = 2.866 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 7.0   2. 28 from 99 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 14.25   n/a 28 autocmod 2.8
comet nuclear magnitude M2 12.5   0.8 28 from 117 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 28 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 28 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2018.3   391P/2019 U2       
 2008.1   391P/2006 F1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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