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51P/Harrington
Classification: Jupiter-family Comet          SPK-ID: 1000038
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457300.5 (2015-Oct-05.0) TDB
Reference: JPL K153/2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .542437041421476 6.3875e-07  
a 3.71446643000283 4.664e-06 au
q 1.699602249252703 1.8812e-06 au
i 5.424389279818731 2.2061e-05 deg
node 83.70082476433753 0.0011047 deg
peri 269.2756022819647 0.0013286 deg
M 7.34011923544291 8.6373e-05 deg
tp 2457247.185701714257
(2015-Aug-12.68570171)
0.00053386 TDB
period 2614.827738790723
7.16
0.0049249
1.348e-05
d
yr
n .1376763733455302 2.5931e-07 deg/d
Q 5.729330610752958 7.194e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 3.867415007133801E-8 6.86E-10
A2 [EST] 3.996867447334527E-9 9.509E-12
A3 [EST] -7.129200060302572E-9 8.432E-10
  Orbit Determination Parameters
   # obs. used (total)      653  
   data-arc span      5085 days (13.92 yr)  
   first obs. used      2001-09-23  
   last obs. used      2015-08-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      2  
   norm. resid. RMS      .86271  
   source      ORB  
   producer      Alan B. Chamberlin  
   solution date      2015-Oct-07 10:04:30  

Additional Information
 Earth MOID = .704944 au 
 T_jup = 2.814 
[ 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 11.8   2. K153/2 2 parameter fit from 143 observations, autocmod 2.6
comet total magnitude slope K1 14.   n/a K153/2 autocmod 2.6
comet nuclear magnitude M2 15.1   0.9 K153/2 from 440 observations, autocmod 2.6
comet nuclear magnitude slope K2 5.   n/a K153/2 autocmod 2.6
comet nuclear phase coefficient PC 0.03   n/a K153/2 autocmod 2.6
diameter diameter 4.8 km n/a Scotti,J (1994) BAAS 26:1375  

51P/Harrington          Discovered 1953-Aug-14 by Harrington, Robert G. at Palomar Mountain Observatory, California
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 
 1994.1       1994 XXII   1994g 
 1987.0       1987 XXVIII   1987n 
 1979.8       1980 XIV   1980m 
 1958.3   51P/1960 P1   1960 VII   1960g 
 1951.2   51P/1953 P1   1953 VI   1953e 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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