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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 2458194.5 (2018-Mar-17.0) TDB
Reference: JPL K171/14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3172109886407994 1.0817e-06  
a 4.127386232724153 1.2952e-05 au
q 2.8181339653393 4.6543e-06 au
i 13.02919462663023 1.8043e-05 deg
node 356.971395574693 4.318e-05 deg
peri 357.656913980399 0.00030275 deg
M 32.89754857086935 0.00027852 deg
tp 2457914.619829560959
(2017-Jun-10.11982956)
0.0010712 TDB
period 3062.746792241978
8.39
0.014417
3.947e-05
d
yr
n .1175415482964148 5.5329e-07 deg/d
Q 5.436638500109007 1.7061e-05 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -1.879191592114109E-8 1.03E-9
A2 [EST] -1.320581808547357E-9 1.692E-10
A3 [EST] 8.524026113962529E-10 1.357E-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)      1213  
   data-arc span      2571 days (7.04 yr)  
   first obs. used      2014-04-05  
   last obs. used      2021-04-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      3  
   norm. resid. RMS      .53776  
   source      ORB  
   producer      Javier Roa  
   solution date      2021-May-04 14:52:24  

Additional Information
 Earth MOID = 1.81131 au 
 Jupiter MOID = .00440806 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 13.4   1. K171/14 2 parameter fit from 475 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a K171/14 autocmod 2.9c
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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