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71P/Clark
Classification: Jupiter-family Comet          SPK-ID: 1000014
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457899.5 (2017-May-26.0) TDB
Reference: JPL K171/5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4943781414695106 2.2708e-06  
a 3.137154706747789 1.7737e-05 au
q 1.58621399332349 1.9e-06 au
i 9.445340590021177 1.6822e-05 deg
node 59.44627994746336 3.3211e-05 deg
peri 208.9167867411067 0.00010679 deg
M 353.7555636783762 7.5976e-05 deg
tp 2457934.704085862553
(2017-Jun-30.20408586)
0.00015615 TDB
period 2029.562038551383
5.56
0.017213
4.713e-05
d
yr
n .1773781698523259 1.5043e-06 deg/d
Q 4.688095420172089 2.6507e-05 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.109580211754518E-8 1.198E-9
A2 [EST] 8.647826217701629E-9 4.145E-10
  Orbit Determination Parameters
   # obs. used (total)      916  
   data-arc span      705 days (1.93 yr)  
   first obs. used      2016-02-12  
   last obs. used      2018-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .57156  
   source      ORB  
   producer      Javier Roa  
   solution date      2018-Apr-04 15:13:30  

Additional Information
 Earth MOID = .57821 au 
 Jupiter MOID = .554913 au 
 T_jup = 2.990 
[ hide covariance matrix ]
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 5.15646978805604E-12 4.155773969272523E-12 -2.627487140356995E-10 -3.062223548456638E-12 -1.859643613128549E-10 2.573999778488364E-11 -2.557882172857532E-15 1.93794882748317E-17
q 4.155773969272523E-12 3.610140115468211E-12 -2.261505127667261E-10 -3.349098593519191E-12 -1.62037907334215E-10 2.270744954417149E-11 -2.095437611030753E-15 1.045132011487812E-16
tp -2.627487140356995E-10 -2.261505127667261E-10 2.438399170212113E-8 5.3903993734375E-10 1.572296462297731E-8 -1.433735903118521E-9 1.134449690089721E-13 -2.013872391689923E-14
node -3.062223548456638E-12 -3.349098593519191E-12 5.3903993734375E-10 1.102990027508218E-9 -7.339692685508628E-10 5.563188575717423E-11 1.106299763035075E-15 -8.231390740930486E-16
peri -1.859643613128549E-10 -1.62037907334215E-10 1.572296462297731E-8 -7.339692685508628E-10 1.140477982631563E-8 -1.107713335589929E-9 8.28735916255801E-14 -1.359334030340716E-14
i 2.573999778488364E-11 2.270744954417149E-11 -1.433735903118521E-9 5.563188575717423E-11 -1.107713335589929E-9 2.829930800361826E-10 -1.243393648792061E-14 1.142505611341747E-15
A1 -2.557882172857532E-15 -2.095437611030753E-15 1.134449690089721E-13 1.106299763035075E-15 8.28735916255801E-14 -1.243393648792061E-14 1.435874962812219E-18 8.430599797005373E-20
A2 1.93794882748317E-17 1.045132011487812E-16 -2.013872391689923E-14 -8.231390740930486E-16 -1.359334030340716E-14 1.142505611341747E-15 8.430599797005373E-20 1.717967376637498E-19

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 11.7   1. K171/5 2 parameter fit from 217 observations, autocmod 2.6m
comet total magnitude slope K1 12.   n/a K171/5 autocmod 2.6m
comet nuclear magnitude M2 14.6   0.9 K171/5 from 617 observations, autocmod 2.6m
comet nuclear magnitude slope K2 5.   n/a K171/5 autocmod 2.6m
comet nuclear phase coefficient PC 0.03   n/a K171/5 autocmod 2.6m
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 
 1995.3           1994t 
 1989.7       1989 XX   1989h 
 1984.2       1984 VIII   1983w 
 1978.6   71P/1978 G1   1978 XXIII   1978g 
 1973.0   71P/1973 L1   1973 V   1973i 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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