(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Number of unpublished observations |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