(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 ± 0.000000007 |
| Inclination |
18.162464509 ± 0.000000095 ° |
| Longitude of ascending node |
342.793764 ± 0.000001 ° |
| Argument of perihelia |
185.152955 ± 0.000014 ° |
| Mean anomaly |
168.887639 ± 0.000014 ° |
| Orbital period |
12.06 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
624_Hektor_nima_v7.bsp |
| Date of first observation |
1907-02-11 |
| Date of last observation |
2023-04-22 |
| Number of observations used in the fit |
5492 |
| Number of rejected observations |
65 |
| Number of DES observations |
0 |
| Number of MPC observations |
5208 |
| Number of unpublished observations |
10 |
| RMS of observations |
0.129 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2023-01 |
0.004 |
0.001 |
| 2023-07 |
0.003 |
0.001 |
| 2024-01 |
0.005 |
0.003 |
| 2024-07 |
0.004 |
0.002 |
| 2025-01 |
0.006 |
0.005 |
| 2025-07 |
0.005 |
0.004 |
| 2026-01 |
0.007 |
0.006 |
| 2026-07 |
0.006 |
0.006 |
| 2027-01 |
0.008 |
0.005 |
Ephemeris comparison
Difference between NIMAv7 and JPL124 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