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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.
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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .2288581543557255 | 4.4194e-08 | |
| a | 2.784566265968532 | 1.3726e-08 | au |
| q | 2.147295569657759 | 1.2e-07 | au |
| i | 16.19635034913968 | 5.0271e-06 | deg |
| node | 232.191807818469 | 1.5666e-05 | deg |
| peri | 202.0635937901806 | 1.8513e-05 | deg |
| M | 133.5365544711946 | 1.0605e-05 | deg |
| tp | 2457970.946810283556
(2017-Aug-05.44681028) | 4.7812e-05 | TDB |
| period | 1697.206800006275
4.65 | 1.2549e-05
3.436e-08 | d
yr |
| n | .2121132203799024 | 1.5684e-09 | deg/d |
| Q | 3.421836962279304 | 1.6868e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
12.8 |
|
n/a |
MPO435773 |
|
| diameter |
diameter |
16.889 |
km |
0.315 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| geometric albedo |
albedo |
0.056 |
|
0.014 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 7812 Billward | Discovered 1984 Oct. 26 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory. |
| Named in honor of William R. Ward (b. 1943), an accomplished theoretician who specializes in dynamics and celestial mechanics. Ward has made fundamental contributions to a wide variety of topics in modern planetary science, including both solar nebula and circumplanetary disk dynamics, the origin of the moon, planetesimal formation, planetary ring dynamics, and martian obliquity variations and their coupling to planetwide climatological change. Ward has spent most of his career at the Jet Propulsion Laboratory and Southwest Research Institute, Boulder. Both his talents and his good spirits are enjoyed by colleagues around the world. Name proposed and citation written by S. A. Stern. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 19990728/MPCPages.arc | Last Updated: 2010-06-11 |
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