(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 | 11.60 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 5.165894 ± 0.000001 au |
| Eccentricity | 0.094418626 ± 0.000000064 |
| Inclination | 12.989871418 ± 0.000006106 ° |
| Longitude of ascending node | 50.318354 ± 0.000025 ° |
| Argument of perihelia | 4.668383 ± 0.000076 ° |
| Mean anomaly | 253.434134 ± 0.000061 ° |
| Orbital period | 11.74 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 15094_Polymele_nima_v2.bsp |
| Date of first observation | 1951-11-30 |
| Date of last observation | 2020-08-02 |
| Number of observations used in the fit | 777 |
| Number of rejected observations | 2 |
| Number of DES observations | 0 |
| Number of MPC observations | 779 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.452 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.028 | 0.022 |
| 2020-07 | 0.035 | 0.027 |
| 2021-01 | 0.039 | 0.031 |
| 2021-07 | 0.043 | 0.027 |
| 2022-01 | 0.061 | 0.039 |
| 2022-07 | 0.052 | 0.021 |
| 2023-01 | 0.082 | 0.028 |
| 2023-07 | 0.055 | 0.020 |
| 2024-01 | 0.071 | 0.037 |
Ephemeris comparison
Difference between NIMAv2 and JPL13 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.