Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 
[ show covariance matrix ]

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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1941-Dec-26 13:40 2_06:33 Jupiter 0.474940856512833 0.46149853919191 0.488933620731057 3.89006869234452 3.40084985259689 2430355.069718433 3273.19823028249 1101284.68503722 5885.10948260246 53.6659301273738 19892.6536087028 T K171/5 CATAB v2.0e-lin.ifort 2018-Apr-04 15:22:01 2018-Apr-04 15:22
1954-Jan-16 17:26 1_13:02 Jupiter 0.668554139245744 0.653739218401129 0.683314583866714 4.23738561730557 3.92702728590667 2434759.226097949 2222.02438170665 665624.566684402 961.198497243321 5.72016739669529 6081.14900904496 T K171/5 CATAB v2.0e-lin.ifort 2018-Apr-04 15:22:01 2018-Apr-04 15:22
2025-Jan-15 19:44 00:21 Jupiter 1.20344551748478 1.20291665463618 1.20397437824783 6.52368153593559 6.4148856856947 2460691.321982456 20.5094587573016 26257.9776765259 1958.90096153355 -14.6546261510203 11231.4930014012 T K171/5 CATAB v2.0e-lin.ifort 2018-Apr-04 15:22:01 2018-Apr-04 15:22
2036-Nov-27 13:08 03:54 Jupiter 0.50960129323002 0.509421356927894 0.509783315305429 4.06854849915598 3.63714601511854 2465025.047295375 234.347107059134 59121.1352718768 2636.69852043199 88.0221692730152 21184.5458006967 T K171/5 CATAB v2.0e-lin.ifort 2018-Apr-04 15:22:01 2018-Apr-04 15:22
2048-Oct-16 00:17 13:51 Jupiter 0.605751778243507 0.594171821647179 0.617429455179422 4.309022623041 3.97128148234892 2469365.512096711 830.949757645141 703636.412914749 4707.52093759317 -44.0751183643921 10422.5521200086 T K171/5 CATAB v2.0e-lin.ifort 2018-Apr-04 15:22:01 2018-Apr-04 15:22
2120-Sep-13 23:26 2_00:44 Jupiter 0.637055570801426 0.598486147361205 0.676662376050772 4.29392103344047 3.97222588369661 2495630.476143497 2924.33481986419 2359089.88801674 7407.27914053572 -43.4315054192364 9956.19002645723 T K171/5 CATAB v2.0e-lin.ifort 2018-Apr-04 15:22:01 2018-Apr-04 15:22

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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-14 21:46 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin