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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 2456771.5 (2014-Apr-24.0) TDB
Reference: JPL 61 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3169895596184338 6.4423e-08  
a 4.120425509397721 1.2572e-07 AU
q 2.814293641733177 2.9347e-07 AU
i 13.03574322076638 7.8308e-06 deg
node 356.9970887998237 2.7203e-05 deg
peri 357.8626404488979 2.5902e-05 deg
M 225.2060611563332 1.3791e-05 deg
tp 2457915.377166807065
(2017-Jun-10.87716681)
0.00016515 JED
period 3055.002202496225
8.36
0.00013982
3.828e-07
d
yr
n .1178395222451382 5.393e-09 deg/d
Q 5.426557377062266 1.6557e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.253102358715535E-9 8.649E-11
A2 [EST] -3.992768507965551E-11 1.669E-12
  Orbit Determination Parameters
   # obs. used (total)      1606  
   data-arc span      23921 days (65.49 yr)  
   first obs. used      1948-10-07  
   last obs. used      2014-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .95208  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Apr-14 08:38:04  

Additional Information
 Earth MOID = 1.8084 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. 61 2 parameter fit from 362 observations, autocmod 2.5c
comet total magnitude slope K1 20.   n/a 61 autocmod 2.5c
comet nuclear magnitude M2 13.1 mag 0.9 61 from 628 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 61 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 61 autocmod 2.5c
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 
 1967.3       1971 III   1970e 
 1958.9   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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