(1437) Diomedes
Object
| Object |
(1437) Diomedes |
| Diameter(1) |
118 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.25 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460800.5 |
| Semi major axis |
5.225064 ± 0.000000 au |
| Eccentricity |
0.046263418 ± 0.000000006 |
| Inclination |
20.455404850 ± 0.000000142 ° |
| Longitude of ascending node |
315.783615 ± 0.000000 ° |
| Argument of perihelia |
130.745494 ± 0.000006 ° |
| Mean anomaly |
90.150301 ± 0.000005 ° |
| Orbital period |
11.94 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
1437_Diomedes_nima_v7.bsp |
| Date of first observation |
1931-02-17 |
| Date of last observation |
2025-07-12 |
| Number of observations used in the fit |
5879 |
| Number of rejected observations |
22 |
| Number of DES observations |
0 |
| Number of MPC observations |
5340 |
| Number of unpublished observations |
81 |
| RMS of observations |
0.130 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 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 |
0.007 |
| 2024-07 |
0.007 |
0.006 |
| 2025-01 |
0.010 |
0.008 |
| 2025-07 |
0.009 |
0.007 |
| 2026-01 |
0.011 |
0.006 |
| 2026-07 |
0.011 |
0.007 |
| 2027-01 |
0.012 |
0.002 |
| 2027-07 |
0.015 |
0.004 |
| 2028-01 |
0.012 |
0.002 |
Ephemeris comparison
Difference between NIMAv7 and JPL101 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.
Previous NIMA versions