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65P/Gunn
Classification: Jupiter-family Comet          SPK-ID: 1000035
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457831.5 (2017-Mar-19.0) TDB
Reference: JPL K171/12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2503908752722527 3.2148e-07  
a 3.882374146579075 4.289e-06 au
q 2.910263085882775 2.2962e-06 au
i 9.184139333410439 9.6893e-06 deg
node 62.01737390239089 5.2451e-05 deg
peri 213.4810697604877 0.00017631 deg
M 332.7478374724914 0.00013136 deg
tp 2458043.015878705090
(2017-Oct-16.51587871)
0.0006743 TDB
period 2794.116476333583
7.65
0.0046301
1.268e-05
d
yr
n .128842159247559 2.135e-07 deg/d
Q 4.854485207275375 5.3629e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -1.673966884553788E-7 2.336E-8
A2 [EST] -2.949919901981444E-9 3.658E-9
A3 [EST] 2.443035242070834E-8 3.76E-9
  Orbit Determination Parameters
   # obs. used (total)      1871  
   data-arc span      2729 days (7.47 yr)  
   first obs. used      2013-09-23  
   last obs. used      2021-03-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .51734  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2021-Mar-31 15:54:13  

Additional Information
 Earth MOID = 1.89951 au 
 Jupiter MOID = .389569 au 
 T_jup = 2.991 
[ 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 10.9   1. K171/12 2 parameter fit from 703 observations, autocmod 2.9b
comet total magnitude slope K1 7.75   n/a K171/12 autocmod 2.9b
diameter diameter 10.8 km n/a Scotti,J (1994) BAAS 26:1375  

65P/Gunn          Discovered 1970-Oct-27 by Gunn, James E. at Palomar Mountain Observatory, California
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 
 1987.2       1989 XI   
 1979.5       1976 III   
 1971.9   65P/1970 U2   1969 II   1970p 
 1956.6   65P/1954 P1   1953 VIII   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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