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

[ show orbit diagram ]
:
Orbital Elements at Epoch 2458078.5 (2017-Nov-21.0) TDB
Reference: JPL K171/11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3171758541205694 1.7779e-06  
a 4.127314613480848 1.5554e-05 au
q 2.818230075725752 3.5068e-06 au
i 13.02970813091557 2.0243e-05 deg
node 356.9738562710257 5.1235e-05 deg
peri 357.662099073663 0.00022351 deg
M 19.26031513082375 0.00020502 deg
tp 2457914.644630568541
(2017-Jun-10.14463057)
0.00084316 TDB
period 3062.667074482201
8.39
0.017313
4.74e-05
d
yr
n .1175446077699661 6.6447e-07 deg/d
Q 5.436399151235943 2.0488e-05 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -1.86868699386034E-8 1.049E-9
A2 [EST] -1.326568354101431E-9 1.797E-10
A3 [EST] 9.04539017500324E-10 1.715E-10
ALN [SET] .0408373333128795 n/a
NK [SET] 2.6 n/a
NM [SET] 2. n/a
NN [SET] 3. n/a
R0 [SET] 5. n/a
  Orbit Determination Parameters
   # obs. used (total)      1108  
   data-arc span      2480 days (6.79 yr)  
   first obs. used      2014-04-05  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .53483  
   source      ORB  
   producer      Javier Roa  
   solution date      2021-Feb-03 22:16:53  

Additional Information
 Earth MOID = 1.81255 au 
 Jupiter MOID = .00398759 au 
 T_jup = 2.906 
 Nongrav. accels. using CO driven g(r) 
[ 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 13.0   1. K171/11 2 parameter fit from 375 observations, autocmod 2.8
comet total magnitude slope K1 5.5   n/a K171/11 autocmod 2.8
diameter diameter 5.6 km n/a Lamy,P.L.;Toth,I.;Fernandez,Y.R.;Weaver,H.A. (2004) Comets II, pp. 223-264  
rotation period rot_per 15.6 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Kokotankekova, R.; Snodgrass, C.; Lacerda, P.; Green S.F.; et al. (2017) Mon. Not. Royal Ast. Soc. 471, 2974-3007.]

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 
 1983.9       1986 II   1985a 
 1975.5       1978 XIV   1977g 
 1967.1       1971 III   1970e 
 1958.7   47P/1955 H1   1956 II   1962e 
 1950.4   47P/1948 Q1   1948 IX   1948i 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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