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47P/Ashbrook-Jackson
Classification: Jupiter-family Comet          SPK-ID: 1000003
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457164.5 (2015-May-22.0) TDB
Reference: JPL 62 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3167142698709322 6.5512e-08  
a 4.122696695640627 1.3001e-07 AU
q 2.816979821781501 2.9658e-07 AU
i 13.03150248907488 7.9833e-06 deg
node 356.9825941752967 2.8311e-05 deg
peri 357.7794016947507 2.7028e-05 deg
M 271.6134011248957 1.5969e-05 deg
tp 2457915.179275906745
(2017-Jun-10.67927591)
0.00016866 JED
period 3057.528434919195
8.37
0.00014462
3.959e-07
d
yr
n .1177421592841259 5.5693e-09 deg/d
Q 5.428413569499753 1.7118e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.278880784918313E-9 9.199E-11
A2 [EST] -4.05111758117851E-11 1.803E-12
  Orbit Determination Parameters
   # obs. used (total)      1618  
   data-arc span      24301 days (66.53 yr)  
   first obs. used      1948-10-07  
   last obs. used      2015-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .918  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-May-12 21:29:39  

Additional Information
 Earth MOID = 1.81126 AU 
 T_jup = 2.907 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 5.6 mag 1. 62 2 parameter fit from 364 observations, autocmod 2.6
comet total magnitude slope K1 20.   n/a 62 autocmod 2.6
comet nuclear magnitude M2 13.1 mag 0.9 62 from 628 observations, autocmod 2.6
comet nuclear magnitude slope K2 5.   n/a 62 autocmod 2.6
comet nuclear phase coefficient PC 0.03   n/a 62 autocmod 2.6
diameter diameter 5.6 km n/a Lamy,P.L.;Toth,I.;Fernandez,Y.R.;Weaver,H.A. (2004) Comets II, pp. 223-264  

47P/Ashbrook-Jackson          Discovered 1948-Aug-26 by Ashbrook, Joseph at Lowell Observatory, Arizona
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 
 1992.3       1993 XIII   1992j 
 1984.0       1986 II   1985a 
 1975.6       1978 XIV   1977g 
 1967.2       1971 III   1970e 
 1958.8   47P/1955 H1   1956 II   1955c 
 1950.5   47P/1948 Q1   1948 IX   1948i 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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