(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Number of unpublished observations | 1 |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
![residual plot](data/nima/Anchises/omc_NIMAv2.png)
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
![residual plot](data/nima/Anchises/diff_NIMAv2_JPL41.png)
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.