(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 | 0.094418631 ± 0.000000077 |
| Inclination | 12.989869697 ± 0.000008836 ° |
| Longitude of ascending node | 50.318350 ± 0.000034 ° |
| Argument of perihelia | 4.668402 ± 0.000102 ° |
| Mean anomaly | 253.434097 ± 0.000081 ° |
| Orbital period | 11.74 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 15094_Polymele_nima_v1.bsp |
| Date of first observation | 1951-11-30 |
| Date of last observation | 2018-08-17 |
| Number of observations used in the fit | 605 |
| Number of rejected observations | 5 |
| Number of DES observations | 0 |
| Number of MPC observations | 610 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.490 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.038 | 0.026 |
| 2018-07 | 0.057 | 0.038 |
| 2019-01 | 0.043 | 0.027 |
| 2019-07 | 0.057 | 0.042 |
| 2020-01 | 0.050 | 0.035 |
| 2020-07 | 0.059 | 0.043 |
| 2021-01 | 0.063 | 0.047 |
| 2021-07 | 0.064 | 0.038 |
| 2022-01 | 0.088 | 0.053 |
Ephemeris comparison
Difference between NIMAv1 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.