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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .3314689543146266 | 3.8816e-08 | |
| a | 2.87405960679094 | 6.2027e-09 | au |
| q | 1.92139807429004 | 1.103e-07 | au |
| i | 1.852708161573494 | 4.3474e-06 | deg |
| node | 8.45941250434856 | 0.00012276 | deg |
| peri | 338.4144860057318 | 0.00012286 | deg |
| M | 62.91487160237903 | 6.2053e-06 | deg |
| tp | 2458689.476719901412
(2019-Jul-24.97671990) | 3.0389e-05 | TDB |
| period | 1779.68066982843
4.87 | 5.7612e-06
1.577e-08 | d
yr |
| n | .2022834804598433 | 6.5484e-10 | deg/d |
| Q | 3.826721139291839 | 8.2587e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
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Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.5 |
|
n/a |
MPO502153 |
|
| magnitude slope |
G |
0.33 |
|
n/a |
PDS3 (MPC 17257) |
Fit |
| diameter |
diameter |
52.929 |
km |
2.304 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| rotation period |
rot_per |
18.608 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Zappala, V.; Scaltriti, F.; Lagerkvist, C.-I.; Rickman, H.; Harris, A.W. (1982) Icarus 52, 196-201.]
[Pilcher, F. (2009) Minor Planet Bull. 36, 25-27.]
[Pilcher, F. (2011) Minor Planet Bull. 38, 130-131.]
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ferrero, A. (2012) Minor Planet Bull. 39, 138-139.]
[Pilcher, F. (2018) Minor Planet Bull. 45, 356-359.]
[Franco, L.; Pilcher, F.; Ferrero, A.; Maurice, A. (2020) Minor Planet Bull. 47, 120-122.]
[Pilcher, F. (2020) Minor Planet Bull. 47, 34-36.] |
| geometric albedo |
albedo |
0.240 |
|
0.032 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.848 |
|
0.034 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=3.07, mean=8.93, max.=15.71) deg. |
| U-B |
UB |
0.438 |
|
0.056 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=3; phase (min.=3.07, mean=8.93, max.=15.71) deg. |
| Tholen spectral type |
spec_T |
S |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
Sq |
|
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) |
|
| 33 Polyhymnia (A854 UB) Discovered 1854-Oct-28 by Chacornac, J. at Paris |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
|
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Alternate Designations
| A854 UB = 1938 FE = 1953 AK = 1957 YL = 1963 DG = 1976 YT7 = A887 HA |
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