(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 | 8.34 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
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 |
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| Number of unpublished observations | 29 |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.