(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 ± 0.000000 au |
| Eccentricity | 0.089842611 ± 0.000000014 |
| Inclination | 8.066959598 ± 0.000000741 ° |
| Longitude of ascending node | 43.570470 ± 0.000003 ° |
| Argument of perihelia | 28.043794 ± 0.000010 ° |
| Mean anomaly | 142.239403 ± 0.000012 ° |
| Orbital period | 11.81 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 3548_Eurybates_nima_v6.bsp |
| Date of first observation | 1954-02-09 |
| Date of last observation | 2022-04-19 |
| Number of observations used in the fit | 3292 |
| Number of rejected observations | 11 |
| Number of DES observations | 0 |
| Number of MPC observations | 3030 |
| Number of unpublished observations | 27 |
| RMS of observations | 0.120 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.008 | 0.004 |
| 2022-07 | 0.008 | 0.001 |
| 2023-01 | 0.014 | 0.002 |
| 2023-07 | 0.011 | 0.002 |
| 2024-01 | 0.018 | 0.007 |
| 2024-07 | 0.014 | 0.006 |
| 2025-01 | 0.018 | 0.011 |
| 2025-07 | 0.016 | 0.009 |
| 2026-01 | 0.018 | 0.010 |
Ephemeris comparison
Difference between NIMAv6 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.