(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 | 8.27 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 5.222988 ± 0.000000 au |
| Eccentricity | 0.046324038 ± 0.000000006 |
| Inclination | 20.458315334 ± 0.000000142 ° |
| Longitude of ascending node | 315.789794 ± 0.000000 ° |
| Argument of perihelia | 130.241660 ± 0.000007 ° |
| Mean anomaly | 74.128477 ± 0.000005 ° |
| Orbital period | 11.94 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 1437_Diomedes_nima_v6.bsp |
| Date of first observation | 1931-02-17 |
| Date of last observation | 2024-06-27 |
| Number of observations used in the fit | 5190 |
| Number of rejected observations | 22 |
| Number of DES observations | 0 |
| Number of MPC observations | 4725 |
| Number of unpublished observations | 7 |
| RMS of observations | 0.130 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.009 | 0.008 |
| 2024-07 | 0.007 | 0.006 |
| 2025-01 | 0.010 | 0.008 |
| 2025-07 | 0.009 | 0.008 |
| 2026-01 | 0.012 | 0.006 |
| 2026-07 | 0.012 | 0.008 |
| 2027-01 | 0.013 | 0.003 |
| 2027-07 | 0.016 | 0.004 |
| 2028-01 | 0.012 | 0.002 |
Ephemeris comparison
Difference between NIMAv6 and JPL97 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.