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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 2458062.5 (2017-Nov-05.0) TDB
Reference: JPL K182/13 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .7104663125616585 | 1.1043e-07 | |
| a | 3.500460435587224 | 1.4938e-07 | au |
| q | 1.013501217647592 | 3.8241e-07 | au |
| i | 32.00310320419106 | 7.8509e-06 | deg |
| node | 195.4052529144569 | 2.4253e-05 | deg |
| peri | 172.8087008849619 | 3.8584e-05 | deg |
| M | 313.4577161575798 | 4.9651e-06 | deg |
| tp | 2458371.765429785152
(2018-Sep-10.26542979) | 3.176e-05 | TDB |
| period | 2392.137762289604
6.55 | 0.00015312
4.192e-07 | d
yr |
| n | .1504930049076398 | 9.633e-09 | deg/d |
| Q | 5.987419653526856 | 2.555e-07 | au |
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Additional Model Parameters
| Parameter | Value | Uncertainty (1-sigma) |
| A1 [EST] | 3.107394081007322E-9 | 7.213E-11 |
| A2 [EST] | -1.848644841277313E-9 | 4.372E-11 |
| A3 [EST] | -1.815642064993985E-9 | 4.233E-11 |
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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 |
13.1 |
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0.9 |
K182/13 |
2 parameter fit from 1424 observations, autocmod 2.8 |
| comet total magnitude slope |
K1 |
8.5 |
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n/a |
K182/13 |
autocmod 2.8 |
| diameter |
diameter |
2.0 |
km |
n/a |
Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264 |
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| 21P/Giacobini-Zinner Discovered 1900-Dec-20 by Giacobini, M. at Nice Observatory, France |
| 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 | | 1992.5 | | 1992 IX | 1991m |
| 1985.9 | | 1985 XIII | 1984e |
| 1979.4 | | 1979 III | 1978h |
| 1972.8 | | 1972 VI | 1972d |
| 1966.3 | | 1966 I | 1965g |
| 1959.7 | | 1959 VIII | 1959b |
| 1946.6 | | 1946 V | 1946c |
| 1940.1 | | 1940 I | 1939l |
| 1933.5 | | 1933 III | 1933c |
| 1927.0 | | 1926 VI | 1926e |
| 1913.9 | 21P/1913 U1 | 1913 V | 1913e |
| 1900.8 | 21P/1900 Y1 | 1900 III | 1900c |
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