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143P/Kowal-Mrkos
Classification: Jupiter-family Comet          SPK-ID: 1000057
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2454717.5 (2008-Sep-08.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4101234425072156 1.1187e-07  
a 4.302855149741567 8.1947e-08 AU
q 2.538153383119655 4.5111e-07 AU
i 4.689761177732502 1.0159e-05 deg
node 245.3797747598137 0.00015339 deg
peri 320.7402966403686 0.00015093 deg
M 329.3957783385669 9.2212e-06 deg
tp 2454994.648386426903
(2009-Jun-12.14838643)
7.869e-05 JED
period 3260.119476896147
8.93
9.3132e-05
2.55e-07
d
yr
n .1104254008330836 3.1545e-09 deg/d
Q 6.067556916363479 1.1556e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      388  
   data-arc span      10757 days (29.45 yr)  
   first obs. used      1984-04-23  
   last obs. used      2013-10-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55584  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-13 19:41:43  

Additional Information
 Earth MOID = 1.5363 AU 
 T_jup = 2.862 
[ 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 11.6 mag 0.9 45 from 167 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 10.   n/a 45 autocmod 2.5c
comet nuclear magnitude M2 14.6 mag 0.7 45 from 155 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 45 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 45 autocmod 2.5c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2000.5   143P/2000 ET90       
 1982.7   143P/1984 H1   1984 X   1984n 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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