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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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:
Orbital Elements at Epoch 2458041.5 (2017-Oct-15.0) TDB
Reference: JPL K171/10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3171675842332894 2.0354e-06  
a 4.127290377452566 1.6436e-05 au
q 2.818247659006634 3.2186e-06 au
i 13.02987725094421 2.1313e-05 deg
node 356.9743281840909 5.4382e-05 deg
peri 357.6642778648413 0.0001853 deg
M 14.91009496793412 0.00016877 deg
tp 2457914.654848014621
(2017-Jun-10.15484801)
0.00071391 TDB
period 3062.640098063941
8.39
0.018295
5.009e-05
d
yr
n .117545643129134 7.0216e-07 deg/d
Q 5.436333095898497 2.1649e-05 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -1.801045050686222E-8 1.06E-9
A2 [EST] -3.758800221155857E-10 2.824E-10
A3 [EST] 9.155921859902385E-10 1.978E-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)      1077  
   data-arc span      2129 days (5.83 yr)  
   first obs. used      2014-04-05  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .53198  
   source      ORB  
   producer      Javier Roa  
   solution date      2020-Feb-05 17:42:09  

Additional Information
 Earth MOID = 1.81327 au 
 Jupiter MOID = .00384709 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 9.9   0.8 K171/10 2 parameter fit from 344 observations, autocmod 2.8
comet total magnitude slope K1 12.   n/a K171/10 autocmod 2.8
comet nuclear magnitude M2 13.6   0.5 K171/10 from 666 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a K171/10 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a K171/10 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. 2019-August); 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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