(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 | 0.137423800 ± 0.000000096 |
| Inclination | 6.920195930 ± 0.000003560 ° |
| Longitude of ascending node | 283.913984 ± 0.000053 ° |
| Argument of perihelia | 40.496263 ± 0.000045 ° |
| Mean anomaly | 184.439882 ± 0.000036 ° |
| Orbital period | 12.19 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 1173_Anchises_nima_v2.bsp |
| Date of first observation | 1930-10-17 |
| Date of last observation | 2019-03-15 |
| Number of observations used in the fit | 1999 |
| Number of rejected observations | 19 |
| Number of DES observations | 0 |
| Number of MPC observations | 2017 |
| Number of unpublished observations | 1 |
| RMS of observations | 0.560 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.015 | 0.012 |
| 2020-07 | 0.017 | 0.016 |
| 2021-01 | 0.026 | 0.019 |
| 2021-07 | 0.035 | 0.027 |
| 2022-01 | 0.039 | 0.023 |
| 2022-07 | 0.064 | 0.033 |
| 2023-01 | 0.050 | 0.023 |
| 2023-07 | 0.083 | 0.039 |
| 2024-01 | 0.057 | 0.026 |
Ephemeris comparison
Difference between NIMAv2 and JPL41 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.