[ hide orbit diagram ]
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 48 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .3315511478153269 | 2.3726e-08 | |
a | 2.874530471110009 | 5.9563e-09 | au |
q | 1.921476593983353 | 6.6877e-08 | au |
i | 1.852738677568048 | 2.0359e-07 | deg |
node | 8.451412793577253 | 1.1775e-05 | deg |
peri | 338.4469104057212 | 1.205e-05 | deg |
M | 103.3268778071995 | 2.1942e-06 | deg |
tp | 2458689.572112757114 (2019-Jul-25.07211276) | 9.9268e-06 | TDB |
period | 1780.118041993361 4.87 | 5.5329e-06 1.515e-08 | d yr |
n | .2022337797311886 | 6.2857e-10 | deg/d |
Q | 3.827584348236664 | 7.9311e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ hide covariance matrix ]
Orbital Elements at Epoch 2456975.5 (2014-Nov-14.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
Element | Value | Uncertainty (1-sigma) | Units |
e | .3366877538810925 | 2.3684e-08 | |
q | 1.902019885898386 | 6.689e-08 | au |
tp | 2456910.502491017701 (2014-Sep-10.00249102) | 7.8858e-06 | TDB |
node | 8.577471876526252 | 1.1676e-05 | deg |
peri | 338.0981543059794 | 1.1923e-05 | deg |
i | 1.86876789454919 | 2.0542e-07 | deg |
|
| | Orbit Determination Parameters
Additional Information
|
Orbit Covariance (6×6)
|
|
e |
q |
tp |
node |
peri |
i |
e |
5.609279189372494E-16 |
-1.581899801904302E-15 |
-3.855759530468799E-14 |
8.274931850832683E-15 |
-5.877289231595911E-14 |
2.907867647193036E-17 |
q |
-1.581899801904302E-15 |
4.474305510737531E-15 |
1.112795516405238E-13 |
-2.408890333967901E-14 |
1.67419787499691E-13 |
-1.077702333461358E-16 |
tp |
-3.855759530468799E-14 |
1.112795516405238E-13 |
6.218539235743558E-11 |
-2.168493982297123E-12 |
1.641969736635759E-11 |
3.832693824527665E-13 |
node |
8.274931850832683E-15 |
-2.408890333967901E-14 |
-2.168493982297123E-12 |
1.363238094541744E-10 |
-1.357394586764095E-10 |
-8.929462158292225E-13 |
peri |
-5.877289231595911E-14 |
1.67419787499691E-13 |
1.641969736635759E-11 |
-1.357394586764095E-10 |
1.421561906745314E-10 |
1.028653230901818E-12 |
i |
2.907867647193036E-17 |
-1.077702333461358E-16 |
3.832693824527665E-13 |
-8.929462158292225E-13 |
1.028653230901818E-12 |
4.219887958063928E-14 |
|
Physical Parameter Table
Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
absolute magnitude |
H |
8.52 |
|
n/a |
E2021B10 |
|
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 |
|
[ show close-approach data ]
Alternate Designations
A854 UB = 1938 FE = 1953 AK = 1957 YL = 1963 DG = 1976 YT7 = A887 HA |
|
|