(15094) Polymele
This object has a more recent orbit available here
Object
| Object | (15094) Polymele |
| Diameter(1) | 21 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 11.76 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2457274.253817529 |
| Semi major axis | 5.161315 ± 0.000001 au |
| Eccentricity | 0.094949496 ± 0.000000150 |
| Inclination | 12.998738776 ± 0.000010072 ° |
| Longitude of ascending node | 50.339836 ± 0.000039 ° |
| Argument of perihelia | 5.076120 ± 0.000067 ° |
| Mean anomaly | 175.152668 ± 0.000072 ° |
| Orbital period | 11.73 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 15094_Polymele_nima_v3.bsp |
| Date of first observation | 1951-11-30 |
| Date of last observation | 2020-11-16 |
| Number of observations used in the fit | 1010 |
| Number of rejected observations | 3 |
| Number of DES observations | 0 |
| Number of MPC observations | 1013 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.412 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.036 | 0.033 |
| 2021-07 | 0.042 | 0.032 |
| 2022-01 | 0.063 | 0.050 |
| 2022-07 | 0.058 | 0.034 |
| 2023-01 | 0.098 | 0.051 |
| 2023-07 | 0.068 | 0.035 |
| 2024-01 | 0.093 | 0.056 |
| 2024-07 | 0.069 | 0.040 |
| 2025-01 | 0.074 | 0.054 |
Ephemeris comparison
Difference between NIMAv3 and JPL16 in right ascension (weighted by cos δ) and in declination.
Gray area represents the 1-σ uncertainty of NIMA ephemeris. Green dots represent the DES observations.