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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 2457262.5 (2015-Aug-28.0) TDB
Reference: JPL 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3167267437788968 6.5293e-08  
a 4.123164511232739 1.2839e-07 AU
q 2.817248041525287 2.9652e-07 AU
i 13.03119065120329 7.9339e-06 deg
node 356.9802329238926 2.8229e-05 deg
peri 357.7622106302243 2.6914e-05 deg
M 283.1757066819097 1.6335e-05 deg
tp 2457915.090120683697
(2017-Jun-10.59012068)
0.00016716 JED
period 3058.048870991824
8.37
0.00014283
3.91e-07
d
yr
n .1177221212567608 5.4984e-09 deg/d
Q 5.42908098094019 1.6905e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.282303525755788E-9 9.191E-11
A2 [EST] -4.065468948845085E-11 1.795E-12
  Orbit Determination Parameters
   # obs. used (total)      1629  
   data-arc span      24349 days (66.66 yr)  
   first obs. used      1948-10-07  
   last obs. used      2015-06-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .91511  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2015-Aug-18 22:07:29  

Additional Information
 Earth MOID = 1.8123 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. 63 2 parameter fit from 375 observations, autocmod 2.6
comet total magnitude slope K1 20.   n/a 63 autocmod 2.6
comet nuclear magnitude M2 13.1 mag 0.9 63 from 628 observations, autocmod 2.6
comet nuclear magnitude slope K2 5.   n/a 63 autocmod 2.6
comet nuclear phase coefficient PC 0.03   n/a 63 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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