(1172) Aneas
Object
| Object |
(1172) Aneas |
| Diameter(1) |
118 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
8.34 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2459800.5 |
| Semi major axis |
5.227315 ± 0.000000 au |
| Eccentricity |
0.106470814 ± 0.000000040 |
| Inclination |
16.654334912 ± 0.000004659 ° |
| Longitude of ascending node |
247.306322 ± 0.000008 ° |
| Argument of perihelia |
51.004078 ± 0.000025 ° |
| Mean anomaly |
10.715899 ± 0.000019 ° |
| Orbital period |
11.95 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv7 |
| Observation file (documentation) |
omc_ast_NIMAv7.txt |
| bsp file |
1172_Aneas_nima_v7.bsp |
| Date of first observation |
1930-10-17 |
| Date of last observation |
2023-07-04 |
| Number of observations used in the fit |
4262 |
| Number of rejected observations |
43 |
| Number of DES observations |
0 |
| Number of MPC observations |
4276 |
| Number of unpublished observations |
29 |
| RMS of observations |
3.216 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2023-01 |
0.017 |
0.014 |
| 2023-07 |
0.030 |
0.020 |
| 2024-01 |
0.028 |
0.018 |
| 2024-07 |
0.035 |
0.016 |
| 2025-01 |
0.039 |
0.016 |
| 2025-07 |
0.036 |
0.011 |
| 2026-01 |
0.047 |
0.011 |
| 2026-07 |
0.035 |
0.010 |
| 2027-01 |
0.048 |
0.014 |
Ephemeris comparison
Difference between NIMAv7 and JPL110 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