(1173) Anchises
Object
| Object |
(1173) Anchises |
| Diameter(1) |
99 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.90 |
| G slop |
0.15 |
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 (documentation) |
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| Number of unpublished observations |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.
Previous NIMA versions