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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer 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.


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:
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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