(1583) Antilochus
Object
| Object |
(1583) Antilochus |
| Diameter(1) |
109 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.66 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
5.149053 ± 0.000000 au |
| Eccentricity |
0.053750584 ± 0.000000009 |
| Inclination |
28.489614312 ± 0.000000393 ° |
| Longitude of ascending node |
221.375452 ± 0.000000 ° |
| Argument of perihelia |
188.676962 ± 0.000012 ° |
| Mean anomaly |
98.800747 ± 0.000010 ° |
| Orbital period |
11.68 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
1583_Antilochus_nima_v7.bsp |
| Date of first observation |
1926-11-10 |
| Date of last observation |
2024-06-18 |
| Number of observations used in the fit |
5507 |
| Number of rejected observations |
30 |
| Number of DES observations |
0 |
| Number of MPC observations |
5172 |
| Number of unpublished observations |
25 |
| RMS of observations |
0.121 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.016 |
0.005 |
| 2024-07 |
0.013 |
0.003 |
| 2025-01 |
0.017 |
0.002 |
| 2025-07 |
0.015 |
0.002 |
| 2026-01 |
0.017 |
0.002 |
| 2026-07 |
0.018 |
0.002 |
| 2027-01 |
0.016 |
0.004 |
| 2027-07 |
0.019 |
0.004 |
| 2028-01 |
0.015 |
0.005 |
Ephemeris comparison
Difference between NIMAv7 and JPL73 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