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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 86 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .03564974786150931 | 2.1081e-08 | |
| a | 2.450042473568833 | 5.5678e-09 | au |
| q | 2.362699077136115 | 5.3071e-08 | au |
| i | 5.175027678142824 | 7.3657e-07 | deg |
| node | 203.3574369704788 | 1.1756e-05 | deg |
| peri | 168.3106974593691 | 1.9955e-05 | deg |
| M | 27.80814822104064 | 2.3768e-05 | deg |
| tp | 2459092.299712269797
(2020-Aug-30.79971227) | 9.2478e-05 | TDB |
| period | 1400.744244933233
3.84 | 4.7749e-06
1.307e-08 | d
yr |
| n | .2570062317244498 | 8.7609e-10 | deg/d |
| Q | 2.53738587000155 | 5.7663e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
9.34 |
|
n/a |
E2021B10 |
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. 2020-October); 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 (A878 RA) Discovered 1878-Sep-09 by Peters, C. H. F. at Clinton |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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