(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 | 8.40 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.239278 ± 0.000000 au |
| Eccentricity | 0.091863018 ± 0.000000047 |
| Inclination | 3.140634492 ± 0.000005460 ° |
| Longitude of ascending node | 221.221264 ± 0.000087 ° |
| Argument of perihelia | 237.373471 ± 0.000092 ° |
| Mean anomaly | 314.694096 ± 0.000033 ° |
| Orbital period | 11.99 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 1143_Odysseus_nima_v6.bsp |
| Date of first observation | 1930-01-28 |
| Date of last observation | 2023-03-28 |
| Number of observations used in the fit | 4370 |
| Number of rejected observations | 36 |
| Number of DES observations | 0 |
| Number of MPC observations | 4355 |
| Number of unpublished observations | 51 |
| RMS of observations | 4.295 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2023-01 | 0.031 | 0.022 |
| 2023-07 | 0.029 | 0.017 |
| 2024-01 | 0.049 | 0.026 |
| 2024-07 | 0.035 | 0.018 |
| 2025-01 | 0.053 | 0.028 |
| 2025-07 | 0.038 | 0.019 |
| 2026-01 | 0.046 | 0.024 |
| 2026-07 | 0.039 | 0.020 |
| 2027-01 | 0.038 | 0.019 |
Ephemeris comparison
Difference between NIMAv6 and JPL99 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.