(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 | 8.89 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 5.145025 ± 0.000000 au |
| Eccentricity | 0.016830947 ± 0.000000056 |
| Inclination | 6.805812186 ± 0.000004018 ° |
| Longitude of ascending node | 159.134968 ± 0.000041 ° |
| Argument of perihelia | 304.175788 ± 0.000289 ° |
| Mean anomaly | 73.992870 ± 0.000309 ° |
| Orbital period | 11.67 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 2207_Antenor_nima_v2.bsp |
| Date of first observation | 1959-03-11 |
| Date of last observation | 2020-08-30 |
| Number of observations used in the fit | 2466 |
| Number of rejected observations | 30 |
| Number of DES observations | 0 |
| Number of MPC observations | 2459 |
| Number of unpublished observations | 37 |
| RMS of observations | 0.573 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.012 | 0.010 |
| 2020-07 | 0.020 | 0.018 |
| 2021-01 | 0.021 | 0.016 |
| 2021-07 | 0.037 | 0.026 |
| 2022-01 | 0.030 | 0.019 |
| 2022-07 | 0.049 | 0.028 |
| 2023-01 | 0.037 | 0.019 |
| 2023-07 | 0.051 | 0.024 |
| 2024-01 | 0.043 | 0.018 |
Ephemeris comparison
Difference between NIMAv2 and JPL33 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.