(1143) Odysseus


This object has a more recent orbit available here

Object

Object (1143) Odysseus
Diameter(1) 115 km
Dynamic class(1) trojan
Absolute magnitude 7.93
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2458600.5
Semi major axis 5.248071 ± 0.000000 au
Eccentricity 0.089745415 ± 0.000000060
Inclination 3.137161942 ± 0.000006000 °
Longitude of ascending node 221.269626 ± 0.000107 °
Argument of perihelia 236.416450 ± 0.000090 °
Mean anomaly 216.858268 ± 0.000059 °
Orbital period 12.02 yr

Ephemeris & Observations

Ephemeris version NIMAv2
Observation file (documentation) omc_ast_NIMAv2.txt
bsp file 1143_Odysseus_nima_v2.bsp
Date of first observation 1930-01-28
Date of last observation 2019-08-10
Number of observations used in the fit 2412
Number of rejected observations 36
Number of DES observations 0
Number of MPC observations 2448
Number of unpublished observations 0
RMS of observations 0.666 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)
2019-01 0.022 0.019
2019-07 0.031 0.026
2020-01 0.024 0.020
2020-07 0.032 0.025
2021-01 0.028 0.022
2021-07 0.035 0.023
2022-01 0.037 0.024
2022-07 0.040 0.020
2023-01 0.054 0.027

Ephemeris comparison

residual plot

Difference between NIMAv2 and JPL67 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.