(1172) Aneas
Object
| Object |
(1172) Aneas |
| Diameter(1) |
118 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.28 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460800.5 |
| Semi major axis |
5.237235 ± 0.000000 au |
| Eccentricity |
0.105906591 ± 0.000000030 |
| Inclination |
16.655660234 ± 0.000004215 ° |
| Longitude of ascending node |
247.254661 ± 0.000008 ° |
| Argument of perihelia |
52.361005 ± 0.000022 ° |
| Mean anomaly |
91.971369 ± 0.000017 ° |
| Orbital period |
11.99 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv9 |
| Observation file (documentation) |
omc_ast_NIMAv9.txt |
| bsp file |
1172_Aneas_nima_v9.bsp |
| Date of first observation |
1930-10-17 |
| Date of last observation |
2025-07-13 |
| Number of observations used in the fit |
5675 |
| Number of rejected observations |
43 |
| Number of DES observations |
0 |
| Number of MPC observations |
5689 |
| Number of unpublished observations |
29 |
| RMS of observations |
2.788 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv9 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.020 |
0.015 |
| 2024-07 |
0.024 |
0.014 |
| 2025-01 |
0.027 |
0.014 |
| 2025-07 |
0.026 |
0.010 |
| 2026-01 |
0.034 |
0.010 |
| 2026-07 |
0.026 |
0.008 |
| 2027-01 |
0.036 |
0.012 |
| 2027-07 |
0.025 |
0.010 |
| 2028-01 |
0.034 |
0.017 |
Ephemeris comparison
Difference between NIMAv9 and JPL120 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