(3548) Eurybates
This object has a more recent orbit available here
Object
| Object | (3548) Eurybates |
| Diameter(1) | 64 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 9.70 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.194242 ± 0.000000 au |
| Eccentricity | 0.088827835 ± 0.000000031 |
| Inclination | 8.059077111 ± 0.000002767 ° |
| Longitude of ascending node | 43.537879 ± 0.000028 ° |
| Argument of perihelia | 27.498440 ± 0.000020 ° |
| Mean anomaly | 270.990722 ± 0.000025 ° |
| Orbital period | 11.84 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 3548_Eurybates_nima_v3.bsp |
| Date of first observation | 1954-02-09 |
| Date of last observation | 2019-10-08 |
| Number of observations used in the fit | 1896 |
| Number of rejected observations | 10 |
| Number of DES observations | 0 |
| Number of MPC observations | 1711 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.116 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.020 | 0.008 |
| 2019-07 | 0.034 | 0.018 |
| 2020-01 | 0.031 | 0.016 |
| 2020-07 | 0.043 | 0.024 |
| 2021-01 | 0.047 | 0.027 |
| 2021-07 | 0.052 | 0.021 |
| 2022-01 | 0.070 | 0.030 |
| 2022-07 | 0.056 | 0.009 |
| 2023-01 | 0.085 | 0.005 |
Ephemeris comparison
Difference between NIMAv3 and JPL52 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.