(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Number of unpublished observations | 26 |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.