(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 |
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Number of unpublished observations | 0 |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

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

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.