(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 | 8.30 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.201523 ± 0.000000 au |
| Eccentricity | 0.043492909 ± 0.000000055 |
| Inclination | 20.479189086 ± 0.000002686 ° |
| Longitude of ascending node | 315.791328 ± 0.000010 ° |
| Argument of perihelia | 130.129257 ± 0.000076 ° |
| Mean anomaly | 268.498330 ± 0.000081 ° |
| Orbital period | 11.86 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 1437_Diomedes_nima_v3.bsp |
| Date of first observation | 1931-02-17 |
| Date of last observation | 2021-08-20 |
| Number of observations used in the fit | 2767 |
| Number of rejected observations | 17 |
| Number of DES observations | 0 |
| Number of MPC observations | 2777 |
| Number of unpublished observations | 7 |
| RMS of observations | 2.447 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) |
| 2021-01 | 0.010 | 0.010 |
| 2021-07 | 0.012 | 0.010 |
| 2022-01 | 0.019 | 0.016 |
| 2022-07 | 0.017 | 0.013 |
| 2023-01 | 0.031 | 0.022 |
| 2023-07 | 0.023 | 0.018 |
| 2024-01 | 0.036 | 0.031 |
| 2024-07 | 0.028 | 0.025 |
| 2025-01 | 0.040 | 0.032 |
Ephemeris comparison
Difference between NIMAv3 and JPL77 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.