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71P/Clark
Classification: Jupiter-family Comet          SPK-ID: 1000014
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | 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 2456364.5 (2013-Mar-13.0) TDB
Reference: JPL K114/5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .498175178622493 1.3504e-07  
a 3.127133494405472 7.3776e-07 AU
q 1.569273207253645 6.0677e-07 AU
i 9.480042735852868 1.2208e-05 deg
node 59.61171339684534 6.7886e-05 deg
peri 208.9003484420799 0.00018017 deg
M 80.75350038001254 0.00014036 deg
tp 2455911.417889793750
(2011-Dec-15.91788979)
0.00062739 JED
period 2019.845070575065
5.53
0.00071479
1.957e-06
d
yr
n .1782314917339206 6.3073e-08 deg/d
Q 4.684993781557298 1.1053e-06 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.335033464715454E-8 9.758E-11
A2 [EST] -8.943881590075508E-10 1.401E-11
A3 [EST] -4.843500686055066E-9 5.46E-11
DT [EST] -46.63175699973704 .6271
  Orbit Determination Parameters
   # obs. used (total)      975  
   data-arc span      6558 days (17.95 yr)  
   first obs. used      1994-12-05  
   last obs. used      2012-11-18  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      1  
   fit RMS      1.0903  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2013-Mar-03 19:25:06  

Additional Information
 Earth MOID = .560702 AU 
 T_jup = 2.990 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 11.3 mag 01. K114/5 2 parameter fit from 355 observations, autocmod 2.5b
comet total magnitude slope K1 13.   n/a K114/5 autocmod 2.5b
comet nuclear magnitude M2 14.8 mag 0.7 K114/5 from 564 observations, autocmod 2.5b
comet nuclear magnitude slope K2 5.   n/a K114/5 autocmod 2.5b
comet nuclear phase coefficient PC 0.03   n/a K114/5 autocmod 2.5b
diameter diameter 1.36 km n/a Lamy, P; Toth, I; Fernandez, Y; Weaver, H.; (2004) Comets II, pp. 223-264  

71P/Clark          Discovered 1973-Jun-09 by Clark, Michael at Mount John University Obs., New Zealand
discovered on plate/photo taken on discovery date
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1995.4           1994t 
 1989.8       1989 XX   1989h 
 1984.3       1984 VIII   1983w 
 1978.8   71P/1978 G1   1978 XXIII   1978g 
 1973.2   71P/1973 L1   1973 V   1973i 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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