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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 25 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .09274499398405731 | 4.8362e-08 | |
| a | 2.520837274095178 | 1.4015e-08 | au |
| q | 2.287042236274433 | 1.2341e-07 | au |
| i | 12.45165232744825 | 3.3914e-06 | deg |
| node | 145.2084321335631 | 2.5192e-05 | deg |
| peri | 301.8461669112626 | 3.3724e-05 | deg |
| M | 77.06771550288809 | 2.1543e-05 | deg |
| tp | 2458887.542308636175
(2020-Feb-08.04230864) | 8.7915e-05 | TDB |
| period | 1461.893195559362
4.00 | 1.2191e-05
3.338e-08 | d
yr |
| n | .2462560199975853 | 2.0536e-09 | deg/d |
| Q | 2.754632311915923 | 1.5314e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
15.74 |
|
n/a |
E2020-QM9 |
|
|
| 78309 Alessielisa | Discovered 2002 Aug. 5 by F. Bernardi at Campo Imperatore. |
| Elisa Maria Alessi (b. 1981) has worked for several years in the fields of space debris dynamics, orbit determination for interplanetary missions, and trajectory design in planet-satellite systems. |
| 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 2014-10-08 | Last Updated: 2015-01-12 |
|
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