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205P/Giacobini-A
Classification: Jupiter-family Comet          SPK-ID: 1002995
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2454766.5 (2008-Oct-27.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .568714327637854 7.0631e-06  
a 3.539301441690985 6.3373e-05 au
q 1.526450001972009 2.7638e-06 au
i 15.30462698794076 5.7958e-05 deg
node 179.6299185991975 7.2971e-05 deg
peri 154.219453037641 0.00054663 deg
M 6.950708178874592 0.00021778 deg
tp 2454719.542895327066
(2008-Sep-10.04289533)
0.00084999 TDB
period 2432.062639837845
6.66
0.065321
0.0001788
d
yr
n .1480225032460523 3.9756e-06 deg/d
Q 5.552152881409961 9.9414e-05 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.379092974617826E-8 3.273E-9
A2 [EST] -1.715887567924681E-8 5.859E-9
  Orbit Determination Parameters
   # obs. used (total)      1143  
   data-arc span      163 days  
   first obs. used      2008-09-11  
   last obs. used      2009-02-21  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      4  
   norm. resid. RMS      .81221  
   source      ORB  
   producer      Otto Matic  
   solution date      2011-Sep-14 21:12:43  

Additional Information
 Earth MOID = .532148 au 
 T_jup = 2.779 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.0   1. 7 from 104 observations, assumed slope, autocmod 2.5a
comet total magnitude slope K1 17.   n/a 7 autocmod 2.5a
comet nuclear magnitude M2 15.7   01. 7 from 967 observations, autocmod 2.5a
comet nuclear magnitude slope K2 5.   n/a 7 autocmod 2.5a
comet nuclear phase coefficient PC 0.03   n/a 7 autocmod 2.5a

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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