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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 2456978.5 (2014-Nov-17.0) TDB
Reference: JPL K139/6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6402771379420908 6.3555e-08  
a 3.016899663207433 5.4442e-08 AU
q 1.08524778139052 2.0186e-07 AU
i 22.42889387840961 9.826e-06 deg
node 211.5375547538724 2.7475e-05 deg
peri 2.146692287947138 3.3501e-05 deg
M 93.84515864619932 1.0561e-05 deg
tp 2456479.559108446068
(2013-Jul-06.05910845)
4.4722e-05 JED
period 1913.990274517906
5.24
5.1809e-05
1.418e-07
d
yr
n .1880887300175422 5.0913e-09 deg/d
Q 4.948551545024346 8.93e-08 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.12500314428686E-10 1.665E-11
A2 [EST] -1.048705624244073E-11 1.729E-13
  Orbit Determination Parameters
   # obs. used (total)      593  
   data-arc span      15571 days (42.63 yr)  
   first obs. used      1972-02-12  
   last obs. used      2014-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .82304  
   data source      ORB  
   producer      Ryan S. Park  
   solution date      2014-Nov-07 12:42:59  

Additional Information
 Earth MOID = .0794761 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 15.3 mag 1. K139/6 from 113 observations, assumed slope, autocmod 2.6
comet total magnitude slope K1 15.   n/a K139/6 autocmod 2.6
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 
 1992.6       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   1927 V   1922b 
 1903.5   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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