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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 94 (heliocentric ecliptic J2000)
| Element | Value | Uncertainty (1-sigma) | Units |
| e | .04030899076422563 | 2.899e-08 | |
| a | 2.750310383154447 | 6.3742e-09 | au |
| q | 2.63944814732112 | 8.0877e-08 | au |
| i | 4.360691774434478 | 3.3459e-06 | deg |
| node | 181.6139848488635 | 4.2387e-05 | deg |
| peri | 113.0063432482316 | 6.0901e-05 | deg |
| M | 15.60388509743809 | 4.3848e-05 | deg |
| tp | 2458928.289353648960
(2020-Mar-19.78935365) | 0.00020293 | TDB |
| period | 1665.98462652373
4.56 | 5.7917e-06
1.586e-08 | d
yr |
| n | .2160884285896334 | 7.5122e-10 | deg/d |
| Q | 2.861172618987773 | 6.6311e-09 | au |
|
| | Orbit Determination Parameters
Additional Information
|
[ show covariance matrix ]
Physical Parameter Table
| Parameter |
Symbol |
Value |
Units |
Sigma |
Reference |
Notes |
| absolute magnitude |
H |
8.1 |
|
n/a |
MPO492752 |
IRAS observations used: 6 |
| magnitude slope |
G |
0.21 |
|
n/a |
PDS3 (MPC 17258) |
Fit |
| diameter |
diameter |
128.578 |
km |
1.557 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M) |
|
| rotation period |
rot_per |
12.029 |
h |
n/a |
LCDB (Rev. 2020-October); Warner et al., 2009 |
Published Reference List:
[Debehogne, H.; Zappala, V. (1980) Astron. Astrophys. Suppl. Ser. 39, 163-165.]
[Harris, A.W.; Young, J.W. (1983) Icarus 54, 59-109.]
[Higgins, D. (2011) Minor Planet Bull. 38, 41-46.]
[Pilcher, F.; Strabla, L.P.; Quadri, U.; Girelli, R. (2014) Minor Planet Bull. 41, 204.]
[Carbognani, A.; Cellino, A.; Caminiti, S. (2019) Planet. Space Sci. 169, 15-34.] |
| geometric albedo |
albedo |
0.047 |
|
0.009 |
urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M) |
|
| B-V |
BV |
0.783 |
|
0.013 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=7; phase (min.=2.76, mean=11.65, max.=19.25) deg. |
| U-B |
UB |
0.379 |
|
0.027 |
EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 |
#obs=7; phase (min.=3.16, mean=13.25, max.=19.25) deg. |
| Tholen spectral type |
spec_T |
T |
|
n/a |
EAR-A-5-DDR-TAXONOMY-V4.0 |
used 7 color indices; used ground-based radiometric albedo |
| SMASSII spectral type |
spec_B |
T |
|
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) |
|
| 308 Polyxo (A891 FA) Discovered 1891-Mar-31 by Borrelly, A. at Marseille |
| Reference: DISCOVERY.DB | Last Updated: 2003-08-29 |
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