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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 35 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .08838875674289398 | 3.4417e-08 | |
| a | 2.749692353300543 | 1.1455e-08 | au |
| q | 2.506650464766865 | 9.5257e-08 | au |
| i | 4.875552579911398 | 4.0254e-06 | deg |
| node | 342.8397032124315 | 3.7079e-05 | deg |
| peri | 35.13667287036752 | 4.2459e-05 | deg |
| M | 153.8614301503302 | 2.0251e-05 | deg |
| tp | 2458488.710053048743
(2019-Jan-05.21005305) | 9.3749e-05 | TDB |
| period | 1665.423106051263
4.56 | 1.0407e-05
2.849e-08 | d
yr |
| n | .2161612857969552 | 1.3508e-09 | deg/d |
| Q | 2.99273424183422 | 1.2468e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ hide covariance matrix ]
Orbital Elements at Epoch 2456941.5 (2014-Oct-11.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .08642405452214583 | 3.4514e-08 | |
| q | 2.51179299891376 | 9.5324e-08 | au |
| tp | 2456814.892520347040
(2014-Jun-06.39252035) | 9.7128e-05 | TDB |
| node | 342.9195033471714 | 3.7007e-05 | deg |
| peri | 33.54654867217883 | 4.2666e-05 | deg |
| i | 4.882401473003098 | 4.0279e-06 | deg |
|
| | Orbit Determination Parameters
Additional Information
|
Orbit Covariance (6×6)
|
| |
e |
q |
tp |
node |
peri |
i |
| e |
1.191203917406265E-15 |
-3.27054906849072E-15 |
-8.520130159478119E-13 |
2.259718672233894E-15 |
-2.182777449415377E-13 |
-1.107099279792021E-16 |
| q |
-3.27054906849072E-15 |
9.086710814216316E-15 |
2.216488473059956E-12 |
-6.379965619057562E-15 |
5.736267302462623E-13 |
3.918197056125096E-16 |
| tp |
-8.520130159478119E-13 |
2.216488473059956E-12 |
9.433777356659043E-9 |
-9.400909858724902E-12 |
2.070007785298441E-9 |
-1.288711330315378E-12 |
| node |
2.259718672233894E-15 |
-6.379965619057562E-15 |
-9.400909858724902E-12 |
1.369536087468732E-9 |
-1.366330636721683E-9 |
-1.380277068992751E-11 |
| peri |
-2.182777449415377E-13 |
5.736267302462623E-13 |
2.070007785298441E-9 |
-1.366330636721683E-9 |
1.820402127393728E-9 |
1.347212141910782E-11 |
| i |
-1.107099279792021E-16 |
3.918197056125096E-16 |
-1.288711330315378E-12 |
-1.380277068992751E-11 |
1.347212141910782E-11 |
1.622404695699945E-11 |
|
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
13.23 |
|
n/a |
E2021B10 |
|
| diameter |
diameter |
11.191 |
km |
2.605 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N) |
|
| geometric albedo |
albedo |
0.058 |
|
0.022 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| SMASSII spectral type |
spec_B |
C |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002) |
|
| 8450 Egorov | Discovered 1977 Aug. 19 by N. S. Chernykh at the Crimean Astrophysical Observatory. |
| Vsevolod Aleksandrovich Egorov (1930-2001) was one of the founders of the modern theory of the space flight dynamics. One of the leading researchers at the Keldysh Institute of Applied Mathematics and a professor at Moscow University, he was a pioneer in studying trajectories from the earth to the moon. |
| NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) |
| Reference: 20020328/MPCPages.arc | Last Updated: 2003-10-02 |
|
Alternate Designations
| 1977 QL1 = 1959 UC = 1975 ED4 = 1986 RL9 = 1991 RN7 |
|
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