(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 | 0.088827834 ± 0.000000031 |
| Inclination | 8.059077090 ± 0.000002313 ° |
| Longitude of ascending node | 43.537879 ± 0.000021 ° |
| Argument of perihelia | 27.498435 ± 0.000018 ° |
| Mean anomaly | 270.990728 ± 0.000021 ° |
| Orbital period | 11.84 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 3548_Eurybates_nima_v4.bsp |
| Date of first observation | 1954-02-09 |
| Date of last observation | 2020-09-01 |
| Number of observations used in the fit | 2144 |
| Number of rejected observations | 10 |
| Number of DES observations | 0 |
| Number of MPC observations | 1933 |
| Number of unpublished observations | 26 |
| RMS of observations | 0.116 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) |
| 2020-01 | 0.024 | 0.013 |
| 2020-07 | 0.033 | 0.018 |
| 2021-01 | 0.036 | 0.021 |
| 2021-07 | 0.039 | 0.016 |
| 2022-01 | 0.054 | 0.023 |
| 2022-07 | 0.044 | 0.007 |
| 2023-01 | 0.068 | 0.005 |
| 2023-07 | 0.044 | 0.006 |
| 2024-01 | 0.056 | 0.021 |
Ephemeris comparison
Difference between NIMAv4 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.