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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 108 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .1057465753320773 | 4.724e-08 | |
a | 2.88681369576549 | 1.0548e-08 | au |
q | 2.581543033816552 | 1.3527e-07 | au |
i | 19.50061326146855 | 4.5084e-06 | deg |
node | 311.3241275954985 | 1.3189e-05 | deg |
peri | 222.0242309739591 | 2.1741e-05 | deg |
M | 209.2323383289053 | 1.9254e-05 | deg |
tp | 2459950.795360294015 (2023-Jan-06.29536029) | 9.7275e-05 | TDB |
period | 1791.540219646655 4.90 | 9.8191e-06 2.688e-08 | d yr |
n | .2009444142264374 | 1.1013e-09 | deg/d |
Q | 3.192084357714428 | 1.1664e-08 | au |
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| | Orbit Determination Parameters
Additional Information
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Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
8.63 |
|
n/a |
E2021B10 |
IRAS observations used: 14 |
diameter |
diameter |
137.562 |
km |
1.081 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
rotation period |
rot_per |
34.3 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Pray, D.P. (2006) Minor Planet Bull. 33, 4-5.] |
geometric albedo |
albedo |
0.040 |
|
0.009 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
B-V |
BV |
0.710 |
|
0.025 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=10.49 deg. |
U-B |
UB |
0.345 |
|
0.037 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=10.49 deg. |
Tholen spectral type |
spec_T |
F |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
|
426 Hippo (A897 RA) Discovered 1897-Aug-25 by Charlois, A. at Nice |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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