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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 12 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .06486371856566855 | 7.6025e-08 | |
| a | 2.605845193253293 | 3.6341e-08 | au |
| q | 2.436820384012411 | 1.919e-07 | au |
| i | 13.90512020818302 | 7.2226e-06 | deg |
| node | 238.4368250041312 | 2.315e-05 | deg |
| peri | 170.0678821133462 | 5.1079e-05 | deg |
| M | 275.1735649598318 | 4.4326e-05 | deg |
| tp | 2459562.534584018562
(2021-Dec-14.03458402) | 0.00019045 | TDB |
| period | 1536.460304915154
4.21 | 3.2141e-05
8.8e-08 | d
yr |
| n | .2343047840860944 | 4.9014e-09 | deg/d |
| Q | 2.774870002494175 | 3.8698e-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 |
16.04 |
|
n/a |
E2020-QN2 |
|
|
| 281507 Johnellen | Discovered 2008 Oct. 7 by D. McDonald at Celbridge. |
| Named for the parents of the discoverer, John and Ellen McDonald, for their inspiration and encouragement of his interest in astronomy. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: MPC batch dated 2019-05-18 | Last Updated: 2019-05-29 |
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