(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 ± 0.000000 au |
| Eccentricity | 0.104369202 ± 0.000000067 |
| Inclination | 16.664084371 ± 0.000006463 ° |
| Longitude of ascending node | 247.326004 ± 0.000015 ° |
| Argument of perihelia | 50.657446 ± 0.000037 ° |
| Mean anomaly | 271.733127 ± 0.000044 ° |
| Orbital period | 11.92 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 1172_Aneas_nima_v3.bsp |
| Date of first observation | 1930-10-17 |
| Date of last observation | 2020-05-16 |
| Number of observations used in the fit | 2367 |
| Number of rejected observations | 34 |
| Number of DES observations | 0 |
| Number of MPC observations | 2400 |
| Number of unpublished observations | 1 |
| RMS of observations | 0.504 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2019-01 | 0.016 | 0.019 |
| 2019-07 | 0.016 | 0.018 |
| 2020-01 | 0.007 | 0.015 |
| 2020-07 | 0.009 | 0.018 |
| 2021-01 | 0.014 | 0.015 |
| 2021-07 | 0.030 | 0.026 |
| 2022-01 | 0.029 | 0.020 |
| 2022-07 | 0.054 | 0.036 |
| 2023-01 | 0.042 | 0.026 |
Ephemeris comparison
Difference between NIMAv3 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.