(1437) Diomedes
Object
| Object |
(1437) Diomedes |
| Diameter(1) |
118 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.31 |
| G slop |
0.15 |
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 (documentation) |
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| Number of unpublished observations |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.
Previous NIMA versions