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26P/Grigg-Skjellerup
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000034
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456717.5 (2014-Mar-01.0) TDB
Reference: JPL K139/5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6401624496430395 6.2817e-08  
a 3.017212051869576 5.2645e-08 AU
q 1.085706193652247 1.9972e-07 AU
i 22.42427046301934 9.4338e-06 deg
node 211.5465991582418 2.5838e-05 deg
peri 2.150636663901096 3.0482e-05 deg
M 44.75465741899608 9.2265e-06 deg
tp 2456479.518655447757
(2013-Jul-06.01865545)
4.3804e-05 JED
period 1914.287562001168
5.24
5.0101e-05
1.372e-07
d
yr
n .1880595199728829 4.922e-09 deg/d
Q 4.948717910086906 8.6346e-08 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.125354015701345E-10 1.476E-11
A2 [EST] -1.042113397732317E-11 1.534E-13
  Orbit Determination Parameters
   # obs. used (total)      582  
   data-arc span      15204 days (41.63 yr)  
   first obs. used      1972-02-12  
   last obs. used      2013-09-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .85718  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Feb-19 14:52:56  

Additional Information
 Earth MOID = .0803176 AU 
 T_jup = 2.806 
[ 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 16.5 mag 0.9 K139/5 2 parameter fit from 119 observations, autocmod 2.5c
comet total magnitude slope K1 7.   n/a K139/5 autocmod 2.5c
diameter diameter 2.6 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  

26P/Grigg-Skjellerup          Discovered 1902-Jul-23 by Grigg, John at Thames, New Zealand
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1992.5       1992 XVIII   
 1987.3       1987 X   1986m 
 1982.1       1982 IV   1982a 
 1976.8       1977 VI   1977b 
 1971.6       1972 II   1972b 
 1966.3       1967 I   1966f 
 1961.1       1961 IX   1961g 
 1955.9       1957 I   1956i 
 1950.6       1952 IV   1952b 
 1945.4       1947 II   1947a 
 1940.1       1942 V   1942d 
 1934.9       1937 III   1937e 
 1929.7       1932 II   1932d 
 1924.4   26P/1922 K1   1922 I   1922b 
 1903.4   26P/1902 O1   1902 II   1902c 
 1809.1   26P/1808 C1   1808 III   
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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