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51P/Harrington-A
Classification: Jupiter-family Comet          SPK-ID: 1000363
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2451677.5 (2000-May-13.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5620663599153678 2.4772e-06  
a 3.580672324457032 1.6649e-06 au
q 1.568096864999769 8.462e-06 au
i 8.654956945930117 4.3844e-05 deg
node 119.1877795469232 0.00022048 deg
peri 233.587839407905 0.0010279 deg
M 303.4588923007622 0.00018378 deg
tp 2452066.193347687348
(2001-Jun-05.69334769)
0.0014216 TDB
period 2474.829568458057
6.78
0.0017261
4.726e-06
d
yr
n .1454645623230929 1.0146e-07 deg/d
Q 5.593247783914295 2.6008e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.625456552342429E-8 1.988E-9
A2 [EST] 3.101463228773831E-9 1.045E-10
  Orbit Determination Parameters
   # obs. used (total)      246  
   data-arc span      7593 days (20.79 yr)  
   first obs. used      1994-09-10  
   last obs. used      2015-06-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      2  
   norm. resid. RMS      .85978  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2016-Feb-23 16:13:17  

Additional Information
 Earth MOID = .5817 au 
 Jupiter MOID = .392983 au 
 T_jup = 2.810 
[ 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 10.6   0.9 8 2 parameter fit from 147 observations, autocmod 2.6f
comet total magnitude slope K1 15.   n/a 8 autocmod 2.6f
comet nuclear magnitude M2 15.1   1. 8 from 29 observations, autocmod 2.6f
comet nuclear magnitude slope K2 5.   n/a 8 autocmod 2.6f
comet nuclear phase coefficient PC 0.03   n/a 8 autocmod 2.6f
diameter diameter 4.8 km n/a Scotti,J (1994) BAAS 26:1375  

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