(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 | 11.82 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 5.186293 ± 0.000000 au |
| Eccentricity | 0.096756650 ± 0.000000023 |
| Inclination | 12.980856413 ± 0.000002271 ° |
| Longitude of ascending node | 50.316048 ± 0.000006 ° |
| Argument of perihelia | 5.462695 ± 0.000017 ° |
| Mean anomaly | 93.771287 ± 0.000014 ° |
| Orbital period | 11.81 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv7 |
| Observation file |
omc_ast_NIMAv7.txt |
| bsp file | 15094_Polymele_nima_v7.bsp |
| Date of first observation | 1951-11-30 |
| Date of last observation | 2024-04-27 |
| Number of observations used in the fit | 2155 |
| Number of rejected observations | 7 |
| Number of DES observations | 0 |
| Number of MPC observations | 1830 |
| Number of unpublished observations | 3 |
| RMS of observations | 0.125 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.014 | 0.010 |
| 2024-07 | 0.012 | 0.008 |
| 2025-01 | 0.017 | 0.012 |
| 2025-07 | 0.016 | 0.011 |
| 2026-01 | 0.018 | 0.013 |
| 2026-07 | 0.019 | 0.014 |
| 2027-01 | 0.019 | 0.011 |
| 2027-07 | 0.023 | 0.014 |
| 2028-01 | 0.021 | 0.008 |
Ephemeris comparison
Difference between NIMAv7 and JPL18 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.