(2207) Antenor
Object
| Object |
(2207) Antenor |
| Diameter(1) |
98 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.98 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460800.5 |
| Semi major axis |
5.171873 ± 0.000000 au |
| Eccentricity |
0.013478246 ± 0.000000004 |
| Inclination |
6.801344809 ± 0.000000177 ° |
| Longitude of ascending node |
159.022334 ± 0.000001 ° |
| Argument of perihelia |
300.642140 ± 0.000030 ° |
| Mean anomaly |
296.689439 ± 0.000032 ° |
| Orbital period |
11.76 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
2207_Antenor_nima_v7.bsp |
| Date of first observation |
1959-03-11 |
| Date of last observation |
2025-07-13 |
| Number of observations used in the fit |
5784 |
| Number of rejected observations |
41 |
| Number of DES observations |
0 |
| Number of MPC observations |
5298 |
| Number of unpublished observations |
50 |
| RMS of observations |
0.153 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) |
| 2024-01 |
0.006 |
0.002 |
| 2024-07 |
0.008 |
0.002 |
| 2025-01 |
0.009 |
0.003 |
| 2025-07 |
0.010 |
0.002 |
| 2026-01 |
0.012 |
0.003 |
| 2026-07 |
0.011 |
0.001 |
| 2027-01 |
0.016 |
0.001 |
| 2027-07 |
0.011 |
0.001 |
| 2028-01 |
0.016 |
0.002 |
Ephemeris comparison
Difference between NIMAv7 and JPL69 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