Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
26P/Grigg-Skjellerup
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000034
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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.


[ revert to old Java-based viewer ]

:
Orbital Elements at Epoch 2454326.5 (2007-Aug-14.0) TDB
Reference: JPL K1810/3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6330527671345312 5.5993e-08  
a 3.043315833693677 4.8306e-08 au
q 1.116736323909562 1.7588e-07 au
i 22.35649066304651 1.0161e-05 deg
node 211.710319637668 2.9596e-05 deg
peri 1.704070781269587 2.5765e-05 deg
M 318.6607259499996 4.4847e-06 deg
tp 2454549.179024563690
(2008-Mar-23.67902456)
2.4166e-05 TDB
period 1939.183758910921
5.31
4.617e-05
1.264e-07
d
yr
n .185645119161983 4.4201e-09 deg/d
Q 4.969895343477792 7.8886e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.607514810981455E-10 1.934E-11
A2 [EST] -1.042381945690657E-11 2.227E-13
  Orbit Determination Parameters
   # obs. used (total)      635  
   data-arc span      19278 days (52.78 yr)  
   first obs. used      1966-12-19  
   last obs. used      2019-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .74833  
   source      ORB  
   producer      Javier Roa  
   solution date      2019-Oct-10 09:54:25  

Additional Information
 Earth MOID = .110412 au 
 Jupiter MOID = .00221554 au 
 T_jup = 2.805 
[ 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 15.1   1. K1810/3 from 130 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 14.   n/a K1810/3 autocmod 2.8
comet nuclear magnitude M2 18.1   01. K1810/3 from 280 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a K1810/3 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a K1810/3 autocmod 2.8
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 
 1992.3       1992 XVIII   
 1987.0       1987 X   1986m 
 1981.7       1982 IV   1982a 
 1976.4       1977 VI   1977b 
 1971.1       1972 II   1972b 
 1965.8       1967 I   1966f 
 1960.4       1961 IX   1961g 
 1955.1       1957 I   1956i 
 1949.8       1952 IV   1952b 
 1944.5       1942 V   1947a 
 1939.2       1937 III   1937e 
 1933.9       1932 II   1932d 
 1928.6   26P/1927 F1   1927 V   1927e 
 1923.3   26P/1922 K1   1922 I   1922b 
 1902.0   26P/1902 O1   1902 II   1902c 
 1806.5   26P/1808 C1   1808 III   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Dec-12 06:38 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin