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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 2457138.5 (2015-Apr-26.0) TDB
Reference: JPL K204/3 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .8483348492897231 | 5.7865e-08 | |
a | 2.215139603214359 | 6.1679e-08 | au |
q | .3359594817658086 | 1.2854e-07 | au |
i | 11.78201216140049 | 8.5151e-06 | deg |
node | 334.5678756805241 | 4.0347e-05 | deg |
peri | 186.5444270974007 | 4.0593e-05 | deg |
M | 155.5232269573344 | 6.0413e-06 | deg |
tp | 2456618.273061145747 (2013-Nov-21.77306115) | 1.161e-05 | TDB |
period | 1204.204038531873 3.30 | 5.0295e-05 1.377e-07 | d yr |
n | .2989526595832552 | 1.2486e-08 | deg/d |
Q | 4.094319724662909 | 1.14e-07 | au |
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Additional Model Parameters
Parameter | Value | Uncertainty (1-sigma) |
A1 [EST] | -1.339593411035947E-11 | 2.881E-11 |
A2 [EST] | -1.737704384096234E-12 | 1.115E-12 |
A3 [EST] | 3.818621968393993E-9 | 1.697E-10 |
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| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
comet total magnitude |
M1 |
14.4 |
|
1. |
K204/3 |
2 parameter fit from 648 observations, autocmod 2.8 |
comet total magnitude slope |
K1 |
6.5 |
|
n/a |
K204/3 |
autocmod 2.8 |
diameter |
diameter |
4.8 |
km |
n/a |
Lamy,P.L.;Toth,I.;Fernandez,Y.R.;Weaver,H.A. (2004) Comets II, pp. 223-264 |
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rotation period |
rot_per |
11.083 |
h |
n/a |
LCDB (Rev. 2019-January); 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: [Fernandez, Y.R.; Lowry, S.C.; Weissman, P.R.; Mueller, B.E.A.; et al. (2005) Icarus 175, 194-214.] [Lowry, S.C.; Weissman, P.R. (2007) Icarus 188, 212-223.] |
geometric albedo |
albedo |
0.046 |
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0.023 |
Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002) |
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2P/Encke Discovered 1786-Jan-17 by Mechain, Pierre F. A. |
Reference: comet.dis | Last Updated: 2003-08-29 |
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[ show close-approach data ]
Alternate Designations
Perihelion Year (est.) | New-Style Desig | Roman Numeral | Year/ Letter | 1994.1 | | 1994 V | |
1990.8 | | 1990 XXI | |
1987.5 | | 1987 XIII | |
1984.2 | | 1984 VI | |
1980.9 | | 1980 XI | |
1977.6 | | 1977 XI | |
1974.3 | | 1974 V | |
1971.0 | | 1971 II | 1970l |
1967.7 | | 1967 XIII | 1967h |
1964.4 | | 1964 IV | 1963h |
1961.1 | | 1961 I | 1960i |
1957.8 | | 1957 VIII | 1957c |
1954.5 | | 1954 IX | 1953f |
1951.2 | | 1951 III | 1950e |
1948.0 | | 1947 XI | 1947i |
1941.4 | | 1941 V | 1941b |
1938.1 | | 1937 VI | 1937h |
1934.8 | | 1934 III | 1934a |
1931.5 | | 1931 II | 1931a |
1928.2 | | 1928 II | 1927h |
1924.9 | | 1924 III | 1924b |
1921.6 | | 1921 IV | 1921d |
1918.3 | | 1918 I | 1917c |
1915.0 | | 1914 VI | 1914d |
1911.7 | | 1911 III | 1911d |
1908.4 | | 1908 I | 1908b |
1905.1 | | 1905 I | 1904b |
1901.8 | | 1901 II | 1901b |
1898.5 | | 1898 III | 1898d |
1895.2 | | 1895 I | 1894d |
1891.9 | | 1891 III | 1891c |
1888.6 | | 1888 II | 1888b |
1885.3 | | 1885 I | 1884d |
1882.0 | | 1881 VII | 1881d |
1878.7 | | 1878 II | 1878c |
1875.4 | | 1875 II | 1875a |
1872.1 | | 1871 V | 1871c |
1868.8 | | 1868 III | |
1865.5 | | 1865 II | |
1862.2 | | 1862 I | |
1858.9 | | 1858 VIII | |
1855.6 | | 1855 III | |
1852.3 | | 1852 I | |
1849.0 | | 1848 II | |
1845.7 | | 1845 IV | |
1842.4 | | 1842 I | |
1839.2 | | 1838 | |
1835.9 | | 1835 II | |
1832.6 | | 1832 I | |
1829.3 | | 1829 | |
1826.0 | | 1825 III | |
1822.7 | 2P/1822 L1 | 1822 II | |
1819.4 | 2P/1818 W1 | 1819 I | |
1806.2 | 2P/1805 U1 | 1805 | |
1796.3 | 2P/1795 V1 | 1795 | |
1786.4 | 2P/1786 B1 | 1786 I | |
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