[ hide orbit diagram ]
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 24 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .09274499458648716 | 4.8795e-08 | |
| a | 2.520837273381033 | 1.4123e-08 | au |
| q | 2.287042234107894 | 1.247e-07 | au |
| i | 12.45165230900912 | 3.4022e-06 | deg |
| node | 145.2084324499849 | 2.5349e-05 | deg |
| peri | 301.8461665717782 | 3.3869e-05 | deg |
| M | 77.06771563549144 | 2.1555e-05 | deg |
| tp | 2458887.542308230688
(2020-Feb-08.04230823) | 8.7975e-05 | TDB |
| period | 1461.893194938137
4.00 | 1.2285e-05
3.363e-08 | d
yr |
| n | .2462560201022306 | 2.0694e-09 | deg/d |
| Q | 2.754632312654172 | 1.5432e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
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 |
|
[ hide close-approach data ]
Close-Approach Data ...sorted by Date/Time (TDB)
|
| Date/Time (TDB) |
Time Uncertainty
(days_HH:MM) |
Body |
Nominal Distance (au) |
Minimum Distance (au) |
Maximum Distance (au) |
V-relative (km/s) |
V-infinity (km/s) |
JD (TDB) |
Time Uncertainty (minutes) |
Semi-major axis (km) |
Semi-minor axis (km) |
range-LOV angle (deg) |
N-sigma |
BP |
Orbit Ref. |
Reference |
Modified |
| 2129-Apr-07 20:36 |
< 00:01 |
Ceres |
0.0177067029735427 |
0.0176995776091749 |
0.0177138843254623 |
4.21240627235315 |
4.21240060834323 |
2498758.358286160 |
0.996666926877217 |
1608.40371666401 |
40.8383670386846 |
-77.359440019804 |
62809.7400195152 |
T |
24 |
CATAB v2.0f-lin.ifort 2021-Feb-24 19:27:43 |
2021-Feb-24 19:27 |
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