(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 9.70
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2458600.5
Semi major axis 5.194242 ± 0.000000 au
Eccentricity 0.088827756 ± 0.000000051
Inclination 8.059073805 ± 0.000004848 °
Longitude of ascending node 43.537960 ± 0.000045 °
Argument of perihelia 27.498333 ± 0.000089 °
Mean anomaly 270.990742 ± 0.000062 °
Orbital period 11.84 yr

Ephemeris & Observations

Ephemeris version NIMAv2
Observation file (documentation) omc_ast_NIMAv2.txt
bsp file 3548_Eurybates_nima_v2.bsp
Date of first observation 1954-02-09
Date of last observation 2018-12-17
Number of observations used in the fit 1409
Number of rejected observations 787
Number of DES observations 0
Number of MPC observations 2196
Number of unpublished observations 0
RMS of observations 0.566 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2018-01 0.017 0.016
2018-07 0.025 0.021
2019-01 0.019 0.015
2019-07 0.029 0.022
2020-01 0.026 0.020
2020-07 0.036 0.025
2021-01 0.039 0.029
2021-07 0.043 0.025
2022-01 0.059 0.034

Ephemeris comparison

residual plot

Difference between NIMAv2 and JPL52 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.