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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.
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .02530393558796648 | 3.7551e-08 | |
| a | 2.904705029070034 | 1.2757e-08 | au |
| q | 2.831204560112404 | 1.1432e-07 | au |
| i | 1.001460868683384 | 3.4296e-06 | deg |
| node | 277.8905251479134 | 0.00019956 | deg |
| peri | 199.2669088253421 | 0.00021143 | deg |
| M | 314.9443868242639 | 6.9349e-05 | deg |
| tp | 2459426.806946881170
(2021-Jul-31.30694688) | 0.0003484 | TDB |
| period | 1808.220888248736
4.95 | 1.1912e-05
3.261e-08 | d
yr |
| n | .1990907207960972 | 1.3116e-09 | deg/d |
| Q | 2.978205498027665 | 1.308e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
14.43 |
|
n/a |
MPCxxxxx |
|
|
| 12131 Echternach | Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld at Leiden on Palomar Schmidt plates taken by T. Gehrels. |
| As assistant editor of the Dutch astronomical magazine Zenit, Dutch science writer Eddy Echternach (b. 1961) has been popularizing astronomy since the late 1980s. He is co-author of numerous books on astronomy and astronomical exercises for use in primary and high schools. The name was suggested by C. E. Koppeschaar. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20070926/MPCPages.arc | Last Updated: 2007-09-30 |
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