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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 31 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .09808940620886988 | 3.7633e-08 | |
| a | 3.169517382162357 | 1.7074e-08 | au |
| q | 2.85862130417736 | 1.155e-07 | au |
| i | 13.22635253546689 | 5.3284e-06 | deg |
| node | 200.5974005532066 | 1.349e-05 | deg |
| peri | 50.34317866947848 | 2.8882e-05 | deg |
| M | 114.7298087547227 | 2.5879e-05 | deg |
| tp | 2458543.656506096831
(2019-Mar-01.15650610) | 0.00014652 | TDB |
| period | 2061.048130139128
5.64 | 1.6654e-05
4.56e-08 | d
yr |
| n | .1746684100849691 | 1.4114e-09 | deg/d |
| Q | 3.480413460147354 | 1.8748e-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 |
12.96 |
|
n/a |
E2021B10 |
|
|
| 7807 Grier | Discovered 1975 Sept. 30 by S. J. Bus at Palomar. |
| Jennifer Grier (b. 1968) is involved in numerous aspects of planetary science education and research. Her research has focused on planetary surface ages via crater counting and radiometric dating. In 2006 she became the Education Officer for the AAS Division of Planetary Sciences. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20070402/MPCPages.arc | Last Updated: 2007-07-05 |
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