(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 | 8.33 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.218844 ± 0.000001 au |
| Eccentricity | 0.104369191 ± 0.000000078 |
| Inclination | 16.664080269 ± 0.000005842 ° |
| Longitude of ascending node | 247.325999 ± 0.000024 ° |
| Argument of perihelia | 50.657468 ± 0.000061 ° |
| Mean anomaly | 271.733107 ± 0.000069 ° |
| Orbital period | 11.92 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 1172_Aneas_nima_v2.bsp |
| Date of first observation | 1930-10-17 |
| Date of last observation | 2019-07-26 |
| Number of observations used in the fit | 2339 |
| Number of rejected observations | 26 |
| Number of DES observations | 0 |
| Number of MPC observations | 2365 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.508 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.025 | 0.020 |
| 2019-07 | 0.027 | 0.022 |
| 2020-01 | 0.033 | 0.021 |
| 2020-07 | 0.045 | 0.028 |
| 2021-01 | 0.043 | 0.023 |
| 2021-07 | 0.070 | 0.037 |
| 2022-01 | 0.051 | 0.027 |
| 2022-07 | 0.080 | 0.043 |
| 2023-01 | 0.057 | 0.029 |
Ephemeris comparison
Difference between NIMAv2 and JPL83 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.