(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 | 0.016830898 ± 0.000000021 |
| Inclination | 6.805818458 ± 0.000000933 ° |
| Longitude of ascending node | 159.135022 ± 0.000015 ° |
| Argument of perihelia | 304.175551 ± 0.000053 ° |
| Mean anomaly | 73.993060 ± 0.000051 ° |
| Orbital period | 11.67 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 2207_Antenor_nima_v3.bsp |
| Date of first observation | 1959-03-11 |
| Date of last observation | 2021-07-10 |
| Number of observations used in the fit | 3475 |
| Number of rejected observations | 35 |
| Number of DES observations | 0 |
| Number of MPC observations | 3364 |
| Number of unpublished observations | 40 |
| RMS of observations | 0.116 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.003 | 0.002 |
| 2021-07 | 0.004 | 0.003 |
| 2022-01 | 0.004 | 0.002 |
| 2022-07 | 0.008 | 0.005 |
| 2023-01 | 0.007 | 0.005 |
| 2023-07 | 0.013 | 0.008 |
| 2024-01 | 0.011 | 0.007 |
| 2024-07 | 0.015 | 0.008 |
| 2025-01 | 0.016 | 0.008 |
Ephemeris comparison
Difference between NIMAv3 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.