(1172) Aneas
This object has a more recent orbit available here
Object
| Object | (1172) Aneas |
| Diameter(1) | 118 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.30 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2460600.5 |
| Semi major axis | 5.235559 ± 0.000000 au |
| Eccentricity | 0.106341541 ± 0.000000035 |
| Inclination | 16.655892154 ± 0.000004406 ° |
| Longitude of ascending node | 247.254143 ± 0.000008 ° |
| Argument of perihelia | 52.162951 ± 0.000024 ° |
| Mean anomaly | 75.669860 ± 0.000018 ° |
| Orbital period | 11.98 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv8 |
| Observation file |
omc_ast_NIMAv8.txt |
| bsp file | 1172_Aneas_nima_v8.bsp |
| Date of first observation | 1930-10-17 |
| Date of last observation | 2024-07-13 |
| Number of observations used in the fit | 4929 |
| Number of rejected observations | 43 |
| Number of DES observations | 0 |
| Number of MPC observations | 4943 |
| Number of unpublished observations | 29 |
| RMS of observations | 2.991 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv8 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2024-01 | 0.024 | 0.017 |
| 2024-07 | 0.030 | 0.015 |
| 2025-01 | 0.034 | 0.015 |
| 2025-07 | 0.032 | 0.010 |
| 2026-01 | 0.042 | 0.011 |
| 2026-07 | 0.031 | 0.009 |
| 2027-01 | 0.043 | 0.013 |
| 2027-07 | 0.030 | 0.012 |
| 2028-01 | 0.040 | 0.019 |
Ephemeris comparison
Difference between NIMAv8 and JPL115 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.