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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.
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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 75 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .036370431961094 | 3.843e-08 | |
a | 2.451427600047417 | 6.4432e-09 | au |
q | 2.362268119312345 | 9.5388e-08 | au |
i | 5.176071695831551 | 4.2792e-06 | deg |
node | 203.4149066269816 | 4.6401e-05 | deg |
peri | 167.2212165797688 | 7.6531e-05 | deg |
M | 234.7349054494776 | 6.169e-05 | deg |
tp | 2459088.314385929595 (2020-Aug-26.81438593) | 0.0002406 | TDB |
period | 1401.932274627591 3.84 | 5.5272e-06 1.513e-08 | d yr |
n | .2567884387251376 | 1.0124e-09 | deg/d |
Q | 2.54058708078249 | 6.6776e-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 |
9.33 |
|
n/a |
IRAS-A-FPA-3-RDR-IMPS-V6.0 |
IRAS observations used: 14 |
diameter |
diameter |
38.490 |
km |
0.317 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
22.346 |
h |
n/a |
LCDB (Rev. 2019-January); Warner et al., 2009 |
Published Reference List: [Pilcher, F. (2009) Minor Planet Bull. 36, 25-27.] [Behrend, R. (2016) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.] |
geometric albedo |
albedo |
0.170 |
|
0.031 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
B-V |
BV |
0.904 |
|
0.033 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=1.81, mean=10.24, max.=17.53) deg. |
U-B |
UB |
0.491 |
|
0.021 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=1.81, mean=10.24, max.=17.53) deg. |
Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 4 color indices; used ground-based radiometric albedo |
SMASSII spectral type |
spec_B |
Sa |
|
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) |
|
189 Phthia Discovered 1878-Sep-09 by Peters, C. H. F. at Clinton |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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