(1143) Odysseus


Object

Object (1143) Odysseus
Diameter(1) 115 km
Dynamic class(1) trojan
Absolute magnitude 8.47
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2460600.5
Semi major axis 5.230490 ± 0.000000 au
Eccentricity 0.090847090 ± 0.000000005
Inclination 3.142097481 ± 0.000000138 °
Longitude of ascending node 221.230537 ± 0.000003 °
Argument of perihelia 238.494200 ± 0.000004 °
Mean anomaly 19.563838 ± 0.000002 °
Orbital period 11.96 yr

Ephemeris & Observations

Ephemeris version NIMAv8
Observation file (documentation) omc_ast_NIMAv8.txt
bsp file 1143_Odysseus_nima_v8.bsp
Date of first observation 1930-01-28
Date of last observation 2024-11-12
Number of observations used in the fit 6858
Number of rejected observations 58
Number of DES observations 0
Number of MPC observations 6349
Number of unpublished observations 55
RMS of observations 0.124 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv8 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2024-01 0.005 0.001
2024-07 0.003 0.001
2025-01 0.006 0.002
2025-07 0.004 0.001
2026-01 0.006 0.002
2026-07 0.005 0.002
2027-01 0.006 0.002
2027-07 0.006 0.002
2028-01 0.006 0.001

Ephemeris comparison

residual plot

Difference between NIMAv8 and JPL108 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.

Previous NIMA versions