(1173) Anchises
Object
| Object |
(1173) Anchises |
| Diameter(1) |
99 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.89 |
| G slop |
0.15 |
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 (documentation) |
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| Number of unpublished observations |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.
Previous NIMA versions