(624) Hektor
Object
| Object |
(624) Hektor |
| Diameter(1) |
225 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
7.30 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2458600.5 |
| Semi major axis |
5.259580 ± 0.000000 au |
| Eccentricity |
0.023280446 ± 0.000000044 |
| Inclination |
18.162467398 ± 0.000003875 ° |
| Longitude of ascending node |
342.793770 ± 0.000008 ° |
| Argument of perihelia |
185.152968 ± 0.000076 ° |
| Mean anomaly |
168.887621 ± 0.000079 ° |
| Orbital period |
12.06 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv6 |
| Observation file (documentation) |
omc_ast_NIMAv6.txt |
| bsp file |
624_Hektor_nima_v6.bsp |
| Date of first observation |
1907-02-11 |
| Date of last observation |
2022-07-14 |
| Number of observations used in the fit |
3618 |
| Number of rejected observations |
40 |
| Number of DES observations |
0 |
| Number of MPC observations |
3650 |
| Number of unpublished observations |
8 |
| RMS of observations |
6.355 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2022-01 |
0.014 |
0.014 |
| 2022-07 |
0.014 |
0.012 |
| 2023-01 |
0.021 |
0.017 |
| 2023-07 |
0.017 |
0.013 |
| 2024-01 |
0.026 |
0.020 |
| 2024-07 |
0.019 |
0.014 |
| 2025-01 |
0.028 |
0.024 |
| 2025-07 |
0.022 |
0.019 |
| 2026-01 |
0.029 |
0.025 |
Ephemeris comparison
Difference between NIMAv6 and JPL89 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