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82P/Gehrels 3
Classification: Encke-type Comet          SPK-ID: 1000031
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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 is not working, here are some notes that might help.
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 2452358.5 (2002-Mar-25.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1238890301135609 6.7329e-07  
a 4.138932388516853 2.5154e-07 au
q 3.626164069197896 2.871e-06 au
i 1.12658939241537 2.2149e-05 deg
node 239.6239758071735 0.0017921 deg
peri 227.6579311368321 0.0018046 deg
M 24.03667946810931 0.000167 deg
tp 2452153.146127854093
(2001-Aug-31.64612785)
0.001411 TDB
period 3075.607596740213
8.42
0.00028038
7.676e-07
d
yr
n .1170500425286887 1.067e-08 deg/d
Q 4.651700707835809 2.827e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] 2.93561772446461E-11 5.002E-12
ALN [SET] .0408373333128795 n/a
NK [SET] 2.6 n/a
NM [SET] 2. n/a
NN [SET] 3. n/a
R0 [SET] 5. n/a
  Orbit Determination Parameters
   # obs. used (total)      140  
   data-arc span      16277 days (44.56 yr)  
   first obs. used      1975-10-27  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63397  
   source      ORB  
   producer      Javier Roa  
   solution date      2020-Jun-02 14:00:46  

Additional Information
 Earth MOID = 2.64312 au 
 Jupiter MOID = .511208 au 
 T_jup = 3.027 
 Nongrav. accels. using CO driven g(r) 
[ 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 7.5   1. 18 from 56 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 18.5   n/a 18 autocmod 2.8
comet nuclear magnitude M2 16.4   1. 18 from 14 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 18 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 18 autocmod 2.8
diameter diameter 1.46 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

82P/Gehrels 3          Discovered 1975-Oct-27 by Gehrels, Tom at Palomar Mountain Observatory, California
discovered on plate/photo taken on discovery date as well as 10/28,30
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1993.2       1993 XIV   1992v 
 1984.8   82P/1984 P1   1985 IV   1984l 
 1976.4   82P/1975 U1   1977 VII   1975o 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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