(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 |
0.045401384 ± 0.000000009 |
| Inclination |
20.473586657 ± 0.000000190 ° |
| Longitude of ascending node |
315.786316 ± 0.000001 ° |
| Argument of perihelia |
128.747213 ± 0.000010 ° |
| Mean anomaly |
9.461465 ± 0.000009 ° |
| Orbital period |
11.91 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv5 |
| Observation file (documentation) |
omc_ast_NIMAv5.txt |
| bsp file |
1437_Diomedes_nima_v5.bsp |
| Date of first observation |
1931-02-17 |
| Date of last observation |
2023-05-15 |
| Number of observations used in the fit |
4410 |
| Number of rejected observations |
21 |
| Number of DES observations |
0 |
| Number of MPC observations |
4153 |
| Number of unpublished observations |
6 |
| RMS of observations |
0.136 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2023-01 |
0.010 |
0.005 |
| 2023-07 |
0.007 |
0.005 |
| 2024-01 |
0.011 |
0.009 |
| 2024-07 |
0.009 |
0.007 |
| 2025-01 |
0.012 |
0.010 |
| 2025-07 |
0.011 |
0.009 |
| 2026-01 |
0.014 |
0.008 |
| 2026-07 |
0.014 |
0.009 |
| 2027-01 |
0.015 |
0.003 |
Ephemeris comparison
Difference between NIMAv5 and JPL90 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