(15094) Polymele
Object
| Object |
(15094) Polymele |
| Diameter(1) |
21 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
11.82 |
| G slop |
0.15 |
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 (documentation) |
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| Number of unpublished observations |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.
Previous NIMA versions