(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 | 7.97 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460800.5 |
| Semi major axis | 5.285944 ± 0.000000 au |
| Eccentricity | 0.067188917 ± 0.000000002 |
| Inclination | 21.755931083 ± 0.000000097 ° |
| Longitude of ascending node | 338.020147 ± 0.000000 ° |
| Argument of perihelia | 82.358371 ± 0.000003 ° |
| Mean anomaly | 86.089091 ± 0.000003 ° |
| Orbital period | 12.15 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv9 |
| Observation file |
omc_ast_NIMAv9.txt |
| bsp file | 911_Agamemnon_nima_v9.bsp |
| Date of first observation | 1919-03-19 |
| Date of last observation | 2025-06-25 |
| Number of observations used in the fit | 5611 |
| Number of rejected observations | 30 |
| Number of DES observations | 0 |
| Number of MPC observations | 5049 |
| Number of unpublished observations | 87 |
| RMS of observations | 0.127 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv9 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.002 | 0.001 |
| 2024-07 | 0.002 | 0.001 |
| 2025-01 | 0.002 | 0.002 |
| 2025-07 | 0.002 | 0.002 |
| 2026-01 | 0.003 | 0.003 |
| 2026-07 | 0.003 | 0.003 |
| 2027-01 | 0.003 | 0.003 |
| 2027-07 | 0.003 | 0.003 |
| 2028-01 | 0.004 | 0.002 |
Ephemeris comparison
Difference between NIMAv9 and JPL129 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.