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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 79 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .2045401473942411 | 3.5906e-08 | |
a | 2.615168420362096 | 6.0293e-09 | au |
q | 2.080261486200468 | 9.4321e-08 | au |
i | 14.32337064257413 | 3.96e-06 | deg |
node | 207.5440059879075 | 1.7028e-05 | deg |
peri | 155.6144725456961 | 1.9702e-05 | deg |
M | 169.9252567097672 | 1.0408e-05 | deg |
tp | 2458471.372706260364 (2018-Dec-18.87270626) | 4.4134e-05 | TDB |
period | 1544.71342770778 4.23 | 5.342e-06 1.463e-08 | d yr |
n | .233052936255114 | 8.0596e-10 | deg/d |
Q | 3.150075354523724 | 7.2625e-09 | 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 |
8.37 |
|
n/a |
E2021B10 |
IRAS observations used: 23 |
magnitude slope |
G |
0.23 |
|
n/a |
PDS3 (MPC 17258) |
Fit |
diameter |
diameter |
64.78 |
km |
1.2 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 23 |
rotation period |
rot_per |
10.041 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.] [Schober, H.J.; Erikson, A.; Hahn, G.; Lagerkvist, C.-I.; et al. (1994) Astron. Astrophys. Suppl. Ser. 105, 281-300.] [Behrend, R. (2001) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Riccioli, D.; Blanco, C.; Cigna, M. (2001) Planet. Space Sci. 49, 657-671.] [Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.] [Behrend, R. (2014) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] |
geometric albedo |
albedo |
0.1676 |
|
0.006 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 23 |
B-V |
BV |
0.876 |
|
0.025 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=5; phase (min.=7.39, mean=14.10, max.=25.73) deg. |
U-B |
UB |
0.459 |
|
0.036 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=5; phase (min.=7.39, mean=14.10, max.=25.73) deg. |
Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices |
SMASSII spectral type |
spec_B |
S |
|
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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258 Tyche (A886 JA) Discovered 1886-May-04 by Luther, R. at Dusseldorf |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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