(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 | 5.277537 ± 0.000000 au |
| Eccentricity | 0.066008448 ± 0.000000014 |
| Inclination | 21.763447746 ± 0.000001521 ° |
| Longitude of ascending node | 338.005376 ± 0.000008 ° |
| Argument of perihelia | 80.628538 ± 0.000034 ° |
| Mean anomaly | 268.860716 ± 0.000047 ° |
| Orbital period | 12.12 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 911_Agamemnon_nima_v2.bsp |
| Date of first observation | 1919-03-19 |
| Date of last observation | 2019-08-10 |
| Number of observations used in the fit | 1901 |
| Number of rejected observations | 29 |
| Number of DES observations | 0 |
| Number of MPC observations | 1766 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.101 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.011 | 0.008 |
| 2019-07 | 0.020 | 0.018 |
| 2020-01 | 0.017 | 0.017 |
| 2020-07 | 0.027 | 0.024 |
| 2021-01 | 0.025 | 0.025 |
| 2021-07 | 0.034 | 0.021 |
| 2022-01 | 0.038 | 0.029 |
| 2022-07 | 0.039 | 0.007 |
| 2023-01 | 0.054 | 0.006 |
Ephemeris comparison
Difference between NIMAv2 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.