(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) | 2459800.5 |
| Semi major axis | 5.167672 ± 0.000000 au |
| Eccentricity | 0.012526149 ± 0.000000007 |
| Inclination | 6.802324651 ± 0.000000252 ° |
| Longitude of ascending node | 159.028740 ± 0.000002 ° |
| Argument of perihelia | 305.356887 ± 0.000051 ° |
| Mean anomaly | 207.955757 ± 0.000053 ° |
| Orbital period | 11.75 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 2207_Antenor_nima_v5.bsp |
| Date of first observation | 1959-03-11 |
| Date of last observation | 2023-07-04 |
| Number of observations used in the fit | 4464 |
| Number of rejected observations | 38 |
| Number of DES observations | 0 |
| Number of MPC observations | 4176 |
| Number of unpublished observations | 46 |
| RMS of observations | 0.138 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2023-01 | 0.006 | 0.001 |
| 2023-07 | 0.010 | 0.003 |
| 2024-01 | 0.009 | 0.003 |
| 2024-07 | 0.012 | 0.004 |
| 2025-01 | 0.013 | 0.004 |
| 2025-07 | 0.014 | 0.003 |
| 2026-01 | 0.019 | 0.004 |
| 2026-07 | 0.016 | 0.002 |
| 2027-01 | 0.023 | 0.002 |
Ephemeris comparison
Difference between NIMAv5 and JPL58 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.