(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 | 0.137567404 ± 0.000000014 |
| Inclination | 6.914990974 ± 0.000000517 ° |
| 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 | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 1173_Anchises_nima_v4.bsp |
| Date of first observation | 1930-10-17 |
| Date of last observation | 2022-07-09 |
| Number of observations used in the fit | 3335 |
| Number of rejected observations | 19 |
| Number of DES observations | 0 |
| Number of MPC observations | 3062 |
| Number of unpublished observations | 25 |
| RMS of observations | 0.125 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.006 | 0.001 |
| 2022-07 | 0.011 | 0.001 |
| 2023-01 | 0.010 | 0.002 |
| 2023-07 | 0.019 | 0.007 |
| 2024-01 | 0.014 | 0.006 |
| 2024-07 | 0.022 | 0.011 |
| 2025-01 | 0.018 | 0.009 |
| 2025-07 | 0.021 | 0.008 |
| 2026-01 | 0.023 | 0.009 |
Ephemeris comparison
Difference between NIMAv4 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.