(1437) Diomedes
This object has a more recent orbit available here
Object
| Object | (1437) Diomedes |
| Diameter(1) | 118 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.31 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.214433 ± 0.000000 au |
| Eccentricity | 0.045401323 ± 0.000000047 |
| Inclination | 20.473586637 ± 0.000002636 ° |
| Longitude of ascending node | 315.786313 ± 0.000010 ° |
| Argument of perihelia | 128.747179 ± 0.000062 ° |
| Mean anomaly | 9.461493 ± 0.000057 ° |
| Orbital period | 11.91 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 1437_Diomedes_nima_v4.bsp |
| Date of first observation | 1931-02-17 |
| Date of last observation | 2022-05-04 |
| Number of observations used in the fit | 3686 |
| Number of rejected observations | 16 |
| Number of DES observations | 0 |
| Number of MPC observations | 3697 |
| Number of unpublished observations | 5 |
| RMS of observations | 2.121 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.017 | 0.015 |
| 2022-07 | 0.016 | 0.012 |
| 2023-01 | 0.029 | 0.021 |
| 2023-07 | 0.022 | 0.017 |
| 2024-01 | 0.035 | 0.030 |
| 2024-07 | 0.027 | 0.024 |
| 2025-01 | 0.039 | 0.031 |
| 2025-07 | 0.035 | 0.030 |
| 2026-01 | 0.043 | 0.024 |
Ephemeris comparison
Difference between NIMAv4 and JPL84 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.