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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .1698581179756868 | 3.2535e-08 | |
| a | 3.202759860755463 | 1.3688e-08 | au |
| q | 2.658745098479467 | 1.0387e-07 | au |
| i | 11.20435173930231 | 4.105e-06 | deg |
| node | 333.6004747685728 | 1.6378e-05 | deg |
| peri | 330.9537803896464 | 2.0055e-05 | deg |
| M | 185.8836596434082 | 1.265e-05 | deg |
| tp | 2460013.062925812599
(2023-Mar-09.56292581) | 7.4304e-05 | TDB |
| period | 2093.557977074351
5.73 | 1.3421e-05
3.674e-08 | d
yr |
| n | .1719560690184865 | 1.1024e-09 | deg/d |
| Q | 3.746774623031459 | 1.6013e-08 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.8 |
|
n/a |
MPO502158 |
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. 2019-August); 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) |
|
| 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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Alternate Designations
| A904 TC = 1949 YH = 1973 YO4 |
|
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