(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 | 9.87 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 5.212167 ± 0.000000 au |
| Eccentricity | 0.091209659 ± 0.000000010 |
| Inclination | 8.054036680 ± 0.000000612 ° |
| Longitude of ascending node | 43.544094 ± 0.000003 ° |
| Argument of perihelia | 28.160211 ± 0.000009 ° |
| Mean anomaly | 76.603419 ± 0.000007 ° |
| Orbital period | 11.90 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv8 |
| Observation file |
omc_ast_NIMAv8.txt |
| bsp file | 3548_Eurybates_nima_v8.bsp |
| Date of first observation | 1954-02-09 |
| Date of last observation | 2024-06-15 |
| Number of observations used in the fit | 5594 |
| Number of rejected observations | 86 |
| Number of DES observations | 0 |
| Number of MPC observations | 5401 |
| Number of unpublished observations | 28 |
| RMS of observations | 0.120 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv8 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.007 | 0.004 |
| 2024-07 | 0.006 | 0.003 |
| 2025-01 | 0.010 | 0.006 |
| 2025-07 | 0.009 | 0.005 |
| 2026-01 | 0.011 | 0.007 |
| 2026-07 | 0.012 | 0.007 |
| 2027-01 | 0.012 | 0.006 |
| 2027-07 | 0.015 | 0.007 |
| 2028-01 | 0.013 | 0.004 |
Ephemeris comparison
Difference between NIMAv8 and JPL60 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.