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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .2419427115584478 | 3.2069e-08 | |
a | 2.993537307801609 | 8.7358e-09 | au |
q | 2.269272774400712 | 9.7783e-08 | au |
i | 12.65409829223988 | 3.5543e-06 | deg |
node | 134.1375624429589 | 1.7239e-05 | deg |
peri | 277.1766632754395 | 1.8806e-05 | deg |
M | 8.38808557782237 | 8.304e-06 | deg |
tp | 2458956.420588133121 (2020-Apr-16.92058813) | 4.3538e-05 | TDB |
period | 1891.800950866815 5.18 | 8.2811e-06 2.267e-08 | d yr |
n | .1902948615365953 | 8.3299e-10 | deg/d |
Q | 3.717801841202506 | 1.0849e-08 | au |
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| | Orbit Determination Parameters
Additional Information
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[ hide covariance matrix ]
Orbital Elements at Epoch 2455922.5 (2011-Dec-27.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .237389694058813 | 3.1614e-08 | |
q | 2.286853553406925 | 9.5806e-08 | au |
tp | 2455158.893263042562 (2009-Nov-23.39326304) | 3.9194e-05 | TDB |
node | 134.568543339764 | 1.7172e-05 | deg |
peri | 275.8989843900221 | 1.8916e-05 | deg |
i | 12.66773504796401 | 3.5568e-06 | deg |
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| | Orbit Determination Parameters
Additional Information
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Orbit Covariance (6×6)
|
|
e |
q |
tp |
node |
peri |
i |
e |
9.994225215187076E-16 |
-3.021484867301551E-15 |
4.841634341297361E-14 |
-6.604059826941693E-15 |
6.320907053263617E-15 |
-2.374517145045046E-16 |
q |
-3.021484867301551E-15 |
9.178756110768644E-15 |
-9.171263599101787E-14 |
1.904599755731422E-14 |
-6.55161615254379E-15 |
6.140104860547579E-16 |
tp |
4.841634341297361E-14 |
-9.171263599101787E-14 |
1.536136725366762E-9 |
-1.274591453300142E-11 |
3.324177460823562E-10 |
-2.179026169166712E-12 |
node |
-6.604059826941693E-15 |
1.904599755731422E-14 |
-1.274591453300142E-11 |
2.948644764755058E-10 |
-2.897772298397107E-10 |
-4.174833569618287E-12 |
peri |
6.320907053263617E-15 |
-6.55161615254379E-15 |
3.324177460823562E-10 |
-2.897772298397107E-10 |
3.578329874328248E-10 |
3.534510149499795E-12 |
i |
-2.374517145045046E-16 |
6.140104860547579E-16 |
-2.179026169166712E-12 |
-4.174833569618287E-12 |
3.534510149499795E-12 |
1.265065608980993E-11 |
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Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
9.6 |
|
n/a |
MPO502157 |
IRAS observations used: 8 |
diameter |
diameter |
36.698 |
km |
0.408 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
21.806 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Binzel, R.P. (1987) Icarus 72, 135-208.] [Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Aznar, A.M.; Carreno Garcerain, A.; Arce Masego, E.; Brines Rodriques, P.; et al. (2016) Minor Planet Bull. 43, 257-263.] [Devogele, M.; Tanga, P.; Bendjoya, P.; Rivet, J.P.; et al. (2017) ArXiv:1707.07503.] [Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.] |
geometric albedo |
albedo |
0.191 |
|
0.034 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
B-V |
BV |
0.885 |
|
0.025 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=19.21 deg. |
U-B |
UB |
0.471 |
|
0.051 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=19.21 deg. |
Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
SMASSII spectral type |
spec_B |
L |
|
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) |
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458 Hercynia (A900 SD) Discovered 1900-Sep-21 by Wolf, M. and Schwassmann, A. at Heidelberg |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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[ show close-approach data ]
Alternate Designations
A900 SD = 1947 XB = 2016 FW5 = A902 CA = A915 PD |
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