(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 ± 0.000000 au |
| Eccentricity | 0.094949584 ± 0.000000025 |
| Inclination | 12.998739008 ± 0.000002767 ° |
| Longitude of ascending node | 50.339857 ± 0.000006 ° |
| Argument of perihelia | 5.076132 ± 0.000017 ° |
| Mean anomaly | 175.152645 ± 0.000020 ° |
| Orbital period | 11.73 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 15094_Polymele_nima_v4.bsp |
| Date of first observation | 1951-11-30 |
| Date of last observation | 2022-08-26 |
| Number of observations used in the fit | 1759 |
| Number of rejected observations | 6 |
| Number of DES observations | 0 |
| Number of MPC observations | 1435 |
| Number of unpublished observations | 1 |
| RMS of observations | 0.125 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.013 | 0.008 |
| 2022-07 | 0.009 | 0.004 |
| 2023-01 | 0.014 | 0.008 |
| 2023-07 | 0.011 | 0.007 |
| 2024-01 | 0.019 | 0.012 |
| 2024-07 | 0.015 | 0.010 |
| 2025-01 | 0.021 | 0.014 |
| 2025-07 | 0.019 | 0.012 |
| 2026-01 | 0.021 | 0.014 |
Ephemeris comparison
Difference between NIMAv4 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.