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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 84 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .2229031376686673 | 2.2447e-08 | |
a | 2.651965104945906 | 6.5767e-09 | au |
q | 2.060833762065647 | 5.7967e-08 | au |
i | 9.496432726635184 | 5.8613e-07 | deg |
node | 97.20851095999754 | 2.8896e-06 | deg |
peri | 241.8007592040371 | 3.3062e-06 | deg |
M | 183.0888623214838 | 3.6589e-06 | deg |
tp | 2459975.680446477733 (2023-Jan-31.18044648) | 1.8294e-05 | TDB |
period | 1577.430140317688 4.32 | 5.8679e-06 1.607e-08 | d yr |
n | .2282192984644615 | 8.4896e-10 | deg/d |
Q | 3.243096447826165 | 8.0427e-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 |
8.9 |
|
n/a |
MPO502157 |
IRAS observations used: 15 |
diameter |
diameter |
81.83 |
km |
2.3 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 15 |
rotation period |
rot_per |
41.85 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Pilcher, F.; Martinez, L. (2013) Minor Planet Bull. 40, 196-197.] [Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.] |
geometric albedo |
albedo |
0.0694 |
|
0.004 |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 15 |
B-V |
BV |
0.780 |
|
0.024 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=.73, mean=10.06, max.=21.97) deg. |
U-B |
UB |
0.375 |
|
0.025 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=4; phase (min.=.73, mean=10.06, max.=21.97) deg. |
Tholen spectral type |
spec_T |
M |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
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498 Tokio (A902 XA) Discovered 1902-Dec-02 by Charlois, A. at Nice |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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