(911) Agamemnon
This object has a more recent orbit available here
Object
| Object | (911) Agamemnon |
| Diameter(1) | 131 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.04 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.281169 ± 0.000000 au |
| Eccentricity | 0.067427745 ± 0.000000042 |
| Inclination | 21.762041494 ± 0.000002282 ° |
| Longitude of ascending node | 338.004795 ± 0.000014 ° |
| Argument of perihelia | 81.243765 ± 0.000053 ° |
| Mean anomaly | 5.934765 ± 0.000046 ° |
| Orbital period | 12.14 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 911_Agamemnon_nima_v5.bsp |
| Date of first observation | 1919-03-19 |
| Date of last observation | 2022-11-08 |
| Number of observations used in the fit | 3598 |
| Number of rejected observations | 20 |
| Number of DES observations | 0 |
| Number of MPC observations | 3550 |
| Number of unpublished observations | 68 |
| RMS of observations | 3.462 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.013 | 0.012 |
| 2022-07 | 0.007 | 0.007 |
| 2023-01 | 0.010 | 0.010 |
| 2023-07 | 0.010 | 0.009 |
| 2024-01 | 0.020 | 0.018 |
| 2024-07 | 0.017 | 0.016 |
| 2025-01 | 0.029 | 0.028 |
| 2025-07 | 0.023 | 0.024 |
| 2026-01 | 0.033 | 0.032 |
Ephemeris comparison
Difference between NIMAv5 and JPL83 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.