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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 46 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .1971058385788119 | 1.613e-08 | |
a | 3.198585738841814 | 1.1672e-08 | au |
q | 2.568125814521169 | 5.1348e-08 | au |
i | 21.30932268065918 | 3.6679e-07 | deg |
node | 292.0125609965833 | 1.0629e-06 | deg |
peri | 81.63070752515019 | 4.883e-06 | deg |
M | 105.6043083346156 | 7.4057e-06 | deg |
tp | 2458587.564807855932 (2019-Apr-14.06480786) | 4.1244e-05 | TDB |
period | 2089.4665440419 5.72 | 1.1438e-05 3.132e-08 | d yr |
n | .172292780196236 | 9.4311e-10 | deg/d |
Q | 3.829045663162458 | 1.3973e-08 | au |
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| | Orbit Determination Parameters
Additional Information
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[ show covariance matrix ]
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
9.23 |
|
n/a |
E2021B10 |
IRAS observations used: 25 |
diameter |
diameter |
87.812 |
km |
0.433 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
19.959 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Malcolm, G. (2002) Minor Planet Bull. 29, 28-29.] [Pilcher, F. (2019) Minor Planet Bull. 46, 58-60.] [Polakis, T. (2020) Minor Planet Bull. 47, 177-186.] |
geometric albedo |
albedo |
0.044 |
|
0.006 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
B-V |
BV |
0.684 |
|
0.036 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=18.87, mean=19.14, max.=19.41) deg. |
U-B |
UB |
0.368 |
|
0.032 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=18.87, mean=19.14, max.=19.41) deg. |
Tholen spectral type |
spec_T |
C |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
|
445 Edna (A899 TC) Discovered 1899-Oct-02 by Coddington, E. F. at Mount Hamilton |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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[ show close-approach data ]
Alternate Designations
A899 TC = 1978 PJ5 = A918 CB |
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