(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 | 9.85 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2457063.905945957 |
| Semi major axis | 5.185364 ± 0.000001 au |
| Eccentricity | 0.089842570 ± 0.000000085 |
| Inclination | 8.066958380 ± 0.000007349 ° |
| Longitude of ascending node | 43.570516 ± 0.000047 ° |
| Argument of perihelia | 28.043745 ± 0.000060 ° |
| Mean anomaly | 142.239400 ± 0.000074 ° |
| Orbital period | 11.81 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 3548_Eurybates_nima_v5.bsp |
| Date of first observation | 1954-02-09 |
| Date of last observation | 2020-11-08 |
| Number of observations used in the fit | 2177 |
| Number of rejected observations | 10 |
| Number of DES observations | 0 |
| Number of MPC observations | 2161 |
| Number of unpublished observations | 26 |
| RMS of observations | 0.463 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.029 | 0.025 |
| 2021-07 | 0.033 | 0.024 |
| 2022-01 | 0.048 | 0.035 |
| 2022-07 | 0.043 | 0.025 |
| 2023-01 | 0.071 | 0.037 |
| 2023-07 | 0.049 | 0.025 |
| 2024-01 | 0.068 | 0.040 |
| 2024-07 | 0.049 | 0.027 |
| 2025-01 | 0.054 | 0.037 |
Ephemeris comparison
Difference between NIMAv5 and JPL59 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.