(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 | 7.89 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.277539 ± 0.000001 au |
| Eccentricity | 0.066008213 ± 0.000000078 |
| Inclination | 21.763457515 ± 0.000008614 ° |
| Longitude of ascending node | 338.005398 ± 0.000017 ° |
| Argument of perihelia | 80.628206 ± 0.000114 ° |
| Mean anomaly | 268.861032 ± 0.000122 ° |
| Orbital period | 12.12 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 911_Agamemnon_nima_v3.bsp |
| Date of first observation | 1919-03-19 |
| Date of last observation | 2020-09-01 |
| Number of observations used in the fit | 2127 |
| Number of rejected observations | 34 |
| Number of DES observations | 0 |
| Number of MPC observations | 2113 |
| Number of unpublished observations | 48 |
| RMS of observations | 0.585 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.023 | 0.022 |
| 2020-07 | 0.028 | 0.027 |
| 2021-01 | 0.027 | 0.028 |
| 2021-07 | 0.035 | 0.029 |
| 2022-01 | 0.042 | 0.039 |
| 2022-07 | 0.043 | 0.029 |
| 2023-01 | 0.063 | 0.041 |
| 2023-07 | 0.046 | 0.029 |
| 2024-01 | 0.062 | 0.047 |
Ephemeris comparison
Difference between NIMAv3 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.