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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 39 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .0720082688567359 | 2.1037e-08 | |
| a | 3.171466569084151 | 1.6031e-08 | au |
| q | 2.943094751707389 | 7.0003e-08 | au |
| i | 9.430420984717427 | 7.7636e-07 | deg |
| node | 21.2740151597093 | 5.6998e-06 | deg |
| peri | 322.7205598140208 | 1.4388e-05 | deg |
| M | 108.4639647551661 | 1.4956e-05 | deg |
| tp | 2458578.956386650042
(2019-Apr-05.45638665) | 8.4808e-05 | TDB |
| period | 2062.949674678266
5.65 | 1.5641e-05
4.282e-08 | d
yr |
| n | .1745074077273092 | 1.3231e-09 | deg/d |
| Q | 3.399838386460912 | 1.7185e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
12.43 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
18.328 |
km |
0.283 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
| geometric albedo |
albedo |
0.074 |
|
0.005 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M) |
|
|
| 7231 Porco | Discovered 1985 Oct. 15 by E. Bowell at the Anderson Mesa Station of the Lowell Observatory. |
| Named in honor of Carolyn C. Porco (b. 1954), planetary scientist at the University of Arizona. A pioneer in the study of planetary ring systems, Porco has made important contributions to our knowledge of spokes in Saturn's rings, eccentric ring features in the systems of Saturn and Uranus and the azimuthal structure in the rings of Neptune. Through her contributions to the Voyager project and as the team leader for the Cassini imaging system, Porco has been a leader in spacecraft exploration of the outer solar system. In 1997, she originated the idea of sending a capsule containing ashes of E. M. Shoemaker to the moon aboard the Lunar Prospector spacecraft. Name endorsed by the Shoemaker family. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 19980808/MPCPages.arc | Last Updated: 2009-11-17 |
|
Alternate Designations
| 1985 TQ1 = 1974 TQ = 1983 EA2 |
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