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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 2457821.5 (2017-Mar-09.0) TDB
Reference: JPL K171/10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2504176929445655 3.099e-07  
a 3.882540255208209 4.2442e-06 au
q 2.910283481734565 2.343e-06 au
i 9.184000990174042 9.8091e-06 deg
node 62.01757471000693 5.2608e-05 deg
peri 213.4761876854624 0.00018001 deg
M 331.4642311363195 0.00013464 deg
tp 2458042.992719603825
(2017-Oct-16.49271960)
0.00068706 TDB
period 2794.295799012601
7.65
0.0045819
1.254e-05
d
yr
n .1288338908598046 2.1125e-07 deg/d
Q 4.854797028681853 5.307e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -1.700751568880944E-7 2.346E-8
A2 [EST] -2.198860274574436E-9 3.725E-9
A3 [EST] 2.378598814911173E-8 3.771E-9
  Orbit Determination Parameters
   # obs. used (total)      1862  
   data-arc span      2674 days (7.32 yr)  
   first obs. used      2013-09-23  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .5165  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2021-Feb-02 23:53:30  

Additional Information
 Earth MOID = 1.90066 au 
 Jupiter MOID = .3892 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 11.0   1. K171/10 2 parameter fit from 693 observations, autocmod 2.8
comet total magnitude slope K1 7.5   n/a K171/10 autocmod 2.8
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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