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89P/Russell 2
Classification: Jupiter-family Comet          SPK-ID: 1000073
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457560.5 (2016-Jun-21.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4080083815513693 3.4907e-07  
a 3.751002285783576 1.1611e-06 au
q 2.220561913965532 1.974e-06 au
i 12.07653613877625 1.8333e-05 deg
node 41.44521124700714 9.1492e-05 deg
peri 250.1414428824369 0.00029325 deg
M 336.0314231006254 0.00017621 deg
tp 2457737.168519034023
(2016-Dec-14.66851903)
0.00138 TDB
period 2653.502004697989
7.26
0.0012321
3.373e-06
d
yr
n .135669767485619 6.2995e-08 deg/d
Q 5.28144265760162 1.6349e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 7.501812884983252E-9 1.006E-9
A2 [EST] -3.394047270187426E-10 1.35E-11
A3 [EST] -4.244969252452372E-10 3.009E-10
  Orbit Determination Parameters
   # obs. used (total)      188  
   data-arc span      13592 days (37.21 yr)  
   first obs. used      1980-08-09  
   last obs. used      2017-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .72631  
   source      ORB  
   producer      Shantanu Naidu  
   solution date      2017-Nov-06 15:21:31  

Additional Information
 Earth MOID = 1.23952 au 
 Jupiter MOID = .740934 au 
 T_jup = 2.903 
[ 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 12.6   1. 21 2 parameter fit from 108 observations, autocmod 2.6i
comet total magnitude slope K1 12.   n/a 21 autocmod 2.6i
comet nuclear magnitude M2 16.6   01. 21 from 30 observations, autocmod 2.6i
comet nuclear magnitude slope K2 5.   n/a 21 autocmod 2.6i
comet nuclear phase coefficient PC 0.03   n/a 21 autocmod 2.6i
diameter diameter 2.8 km n/a Scotti,J (1994) BAAS 26:1375  

89P/Russell 2          Discovered 1980-Sep-28 by Russell, Kenneth S. at U. K. Schmidt Telescope Unit, Siding Spring
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 
 1995.2       1994 XXIX   1994e 
 1987.9   89P/1987 N1   1987 XI   1987q 
 1980.6   89P/1980 S1   1980 III   1980o 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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