(1437) Diomedes
Object
| Object |
(1437) Diomedes |
| Diameter(1) |
118 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.30 |
| G slop |
0.15 |
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 (documentation) |
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| Number of unpublished observations |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.
Previous NIMA versions