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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 56 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .1699396788432282 | 2.0669e-08 | |
a | 3.20237202225593 | 1.0547e-08 | au |
q | 2.658161949257218 | 6.9677e-08 | au |
i | 11.20559447335114 | 1.2225e-06 | deg |
node | 333.5988223268451 | 4.0696e-06 | deg |
peri | 331.0135812027815 | 7.1231e-06 | deg |
M | 220.2017665907197 | 7.0874e-06 | deg |
tp | 2460013.340405436035 (2023-Mar-09.84040544) | 4.2543e-05 | TDB |
period | 2093.177709193764 5.73 | 1.0341e-05 2.831e-08 | d yr |
n | .1719873083010532 | 8.4965e-10 | deg/d |
Q | 3.746582095254642 | 1.2339e-08 | 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 |
8.81 |
|
n/a |
E2021B10 |
IRAS observations used: 11 |
diameter |
diameter |
112.631 |
km |
1.223 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
rotation period |
rot_per |
7.2 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List: [Di Martino, M. (1984) Icarus 60, 541-546.] [Weidenschilling, S.J.; Chapman, C.R.; Davis, D.R.; Greenberg, R.; et al. (1990) Icarus 86, 402-447.] [Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html] |
geometric albedo |
albedo |
0.041 |
|
0.005 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
B-V |
BV |
0.686 |
|
0.038 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=2; phase (min.=13.94, mean=14.07, max.=14.21) deg. |
U-B |
UB |
0.343 |
|
0.058 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=1; phase=13.94 deg. |
Tholen spectral type |
spec_T |
CD |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 2 color indices |
SMASSII spectral type |
spec_B |
Cb |
|
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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545 Messalina (A904 TC) Discovered 1904-Oct-03 by Gotz, P. at Heidelberg |
Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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[ show close-approach data ]
Alternate Designations
A904 TC = 1949 YH = 1973 YO4 |
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