(1173) Anchises
This object has a more recent orbit available here
Object
| Object | (1173) Anchises |
| Diameter(1) | 99 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.90 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2456633.455055235 |
| Semi major axis | 5.303868 ± 0.000000 au |
| Eccentricity | 0.137567402 ± 0.000000014 |
| Inclination | 6.914990954 ± 0.000000516 ° |
| Longitude of ascending node | 283.908293 ± 0.000002 ° |
| Argument of perihelia | 41.158117 ± 0.000004 ° |
| Mean anomaly | 57.015743 ± 0.000004 ° |
| Orbital period | 12.22 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 1173_Anchises_nima_v5.bsp |
| Date of first observation | 1930-10-17 |
| Date of last observation | 2023-08-10 |
| Number of observations used in the fit | 4443 |
| Number of rejected observations | 27 |
| Number of DES observations | 0 |
| Number of MPC observations | 4108 |
| Number of unpublished observations | 95 |
| RMS of observations | 0.125 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 | 0.009 | 0.002 |
| 2023-07 | 0.017 | 0.006 |
| 2024-01 | 0.013 | 0.005 |
| 2024-07 | 0.020 | 0.010 |
| 2025-01 | 0.017 | 0.008 |
| 2025-07 | 0.020 | 0.007 |
| 2026-01 | 0.021 | 0.008 |
| 2026-07 | 0.019 | 0.003 |
| 2027-01 | 0.024 | 0.004 |
Ephemeris comparison
Difference between NIMAv5 and JPL60 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.