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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 22 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1679265157600789 | 3.8261e-08 | |
| a | 2.755483540277182 | 1.6883e-08 | au |
| q | 2.292764790124188 | 1.0836e-07 | au |
| i | 4.430578118458345 | 5.4644e-06 | deg |
| node | 155.3564862898575 | 5.9598e-05 | deg |
| peri | 281.7023463507367 | 6.2276e-05 | deg |
| M | 83.77082594896204 | 1.9251e-05 | deg |
| tp | 2458811.736525181707
(2019-Nov-24.23652518) | 8.766e-05 | TDB |
| period | 1670.687251189979
4.57 | 1.5355e-05
4.204e-08 | d
yr |
| n | .2154801862189247 | 1.9804e-09 | deg/d |
| Q | 3.218202290430177 | 1.9719e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
16.05 |
|
n/a |
E2021B55 |
|
|
| 120813 (1998 HW28) Discovered 1998-Apr-27 by Spacewatch at Kitt Peak |
| Reference: 20060314/Numbers.arc | Last Updated: 2006-03-23 |
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