(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 | 8.89 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 5.295493 ± 0.000000 au |
| Eccentricity | 0.137423824 ± 0.000000053 |
| Inclination | 6.920196460 ± 0.000001464 ° |
| Longitude of ascending node | 283.913996 ± 0.000024 ° |
| Argument of perihelia | 40.496264 ± 0.000021 ° |
| Mean anomaly | 184.439866 ± 0.000021 ° |
| Orbital period | 12.19 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 1173_Anchises_nima_v3.bsp |
| Date of first observation | 1930-10-17 |
| Date of last observation | 2021-01-12 |
| Number of observations used in the fit | 2683 |
| Number of rejected observations | 14 |
| Number of DES observations | 0 |
| Number of MPC observations | 2695 |
| Number of unpublished observations | 2 |
| RMS of observations | 2.099 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 | 0.005 | 0.005 |
| 2021-07 | 0.006 | 0.007 |
| 2022-01 | 0.011 | 0.007 |
| 2022-07 | 0.021 | 0.012 |
| 2023-01 | 0.022 | 0.010 |
| 2023-07 | 0.047 | 0.022 |
| 2024-01 | 0.036 | 0.017 |
| 2024-07 | 0.058 | 0.030 |
| 2025-01 | 0.050 | 0.025 |
Ephemeris comparison
Difference between NIMAv3 and JPL57 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.