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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 102 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .03885714447738538 | 3.4979e-08 | |
a | 2.74035337702403 | 7.9645e-09 | au |
q | 2.633871069933916 | 9.712e-08 | au |
i | 3.779640787987312 | 3.8858e-06 | deg |
node | 145.0424936783031 | 5.6203e-05 | deg |
peri | 302.8480419122242 | 7.4758e-05 | deg |
M | 333.3947283609739 | 4.9121e-05 | deg |
tp | 2459322.954141691999 (2021-Apr-18.45414169) | 0.00022613 | TDB |
period | 1656.945721405664 4.54 | 7.2236e-06 1.978e-08 | d yr |
n | .2172672256847347 | 9.4719e-10 | deg/d |
Q | 2.846835684114144 | 8.274e-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 |
8.77 |
|
n/a |
E2021B10 |
|
diameter |
diameter |
113 |
km |
n/a |
J.G. Williams (E-mail September 1990) |
based on assumed albedo of 0.048 for C-type |
rotation period |
rot_per |
11.122 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Willis, S. (2004) Minor Planet Bull. 31, 82-83.] [Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Behrend, R. (2013) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] [Pilcher, F. (2020) Minor Planet Bull. 47, 34-36.] |
geometric albedo |
albedo |
0.057 |
|
0.006 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
B-V |
BV |
0.690 |
|
0.022 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=6; phase (min.=2.15, mean=5.88, max.=15.02) deg. |
U-B |
UB |
0.345 |
|
0.040 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=6; phase (min.=2.15, mean=5.88, max.=15.02) deg. |
Tholen spectral type |
spec_T |
C |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices |
SMASSII spectral type |
spec_B |
C |
|
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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206 Hersilia (A879 TC) Discovered 1879-Oct-13 by Peters, C. H. F. at Clinton |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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[ show close-approach data ]
Alternate Designations
A879 TC = 1961 WG = 1974 PM |
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