(2207) Antenor
This object has a more recent orbit available here
Object
| Object | (2207) Antenor |
| Diameter(1) | 98 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.96 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 5.171666 ± 0.000000 au |
| Eccentricity | 0.013156821 ± 0.000000004 |
| Inclination | 6.801638391 ± 0.000000177 ° |
| Longitude of ascending node | 159.025135 ± 0.000001 ° |
| Argument of perihelia | 300.373335 ± 0.000031 ° |
| Mean anomaly | 280.158102 ± 0.000033 ° |
| Orbital period | 11.76 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 2207_Antenor_nima_v6.bsp |
| Date of first observation | 1959-03-11 |
| Date of last observation | 2024-07-12 |
| Number of observations used in the fit | 5079 |
| Number of rejected observations | 41 |
| Number of DES observations | 0 |
| Number of MPC observations | 4593 |
| Number of unpublished observations | 50 |
| RMS of observations | 0.153 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) |
| 2024-01 | 0.006 | 0.002 |
| 2024-07 | 0.008 | 0.003 |
| 2025-01 | 0.009 | 0.003 |
| 2025-07 | 0.010 | 0.002 |
| 2026-01 | 0.013 | 0.003 |
| 2026-07 | 0.011 | 0.001 |
| 2027-01 | 0.016 | 0.001 |
| 2027-07 | 0.011 | 0.001 |
| 2028-01 | 0.017 | 0.002 |
Ephemeris comparison
Difference between NIMAv6 and JPL63 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.