(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 | 0.089842602 ± 0.000000010 |
Inclination | 8.066959674 ± 0.000000613 ° |
Longitude of ascending node | 43.570471 ± 0.000003 ° |
Argument of perihelia | 28.043791 ± 0.000010 ° |
Mean anomaly | 142.239407 ± 0.000011 ° |
Orbital period | 11.81 yr |
Ephemeris & Observations
Ephemeris version | NIMAv7 |
Observation file |
omc_ast_NIMAv7.txt |
bsp file | 3548_Eurybates_nima_v7.bsp |
Date of first observation | 1954-02-09 |
Date of last observation | 2023-05-15 |
Number of observations used in the fit | 4679 |
Number of rejected observations | 79 |
Number of DES observations | 0 |
Number of MPC observations | 4479 |
Number of unpublished observations | 28 |
RMS of observations | 0.120 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
date | σα (arcsec) | σδ (arcsec) |
2023-01 | 0.002 | 0.002 |
2023-07 | 0.003 | 0.002 |
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 | 0.012 | 0.007 |
2026-07 | 0.012 | 0.007 |
2027-01 | 0.012 | 0.006 |
Ephemeris comparison
Difference between NIMAv7 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.