(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 | 0.067427752 ± 0.000000002 |
| Inclination | 21.762039006 ± 0.000000097 ° |
| Longitude of ascending node | 338.004801 ± 0.000000 ° |
| Argument of perihelia | 81.243774 ± 0.000003 ° |
| Mean anomaly | 5.934753 ± 0.000003 ° |
| Orbital period | 12.14 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv7 |
| Observation file |
omc_ast_NIMAv7.txt |
| bsp file | 911_Agamemnon_nima_v7.bsp |
| Date of first observation | 1919-03-19 |
| Date of last observation | 2024-03-05 |
| Number of observations used in the fit | 4591 |
| Number of rejected observations | 22 |
| Number of DES observations | 0 |
| Number of MPC observations | 4031 |
| Number of unpublished observations | 77 |
| RMS of observations | 0.127 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) |
| 2023-01 | 0.002 | 0.000 |
| 2023-07 | 0.001 | 0.000 |
| 2024-01 | 0.002 | 0.001 |
| 2024-07 | 0.002 | 0.001 |
| 2025-01 | 0.003 | 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 |
Ephemeris comparison
Difference between NIMAv7 and JPL120 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.