(659) Nestor
This object has a more recent orbit available here
Object
| Object | (659) Nestor |
| Diameter(1) | 112 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.99 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.166168 ± 0.000000 au |
| Eccentricity | 0.117710914 ± 0.000000075 |
| Inclination | 4.521970100 ± 0.000004096 ° |
| Longitude of ascending node | 350.743629 ± 0.000067 ° |
| Argument of perihelia | 343.198478 ± 0.000065 ° |
| Mean anomaly | 341.519482 ± 0.000019 ° |
| Orbital period | 11.74 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 659_Nestor_nima_v1.bsp |
| Date of first observation | 1908-03-23 |
| Date of last observation | 2018-11-09 |
| Number of observations used in the fit | 2137 |
| Number of rejected observations | 43 |
| Number of DES observations | 0 |
| Number of MPC observations | 2180 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.591 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.016 | 0.013 |
| 2018-07 | 0.028 | 0.021 |
| 2019-01 | 0.020 | 0.014 |
| 2019-07 | 0.034 | 0.023 |
| 2020-01 | 0.026 | 0.017 |
| 2020-07 | 0.036 | 0.023 |
| 2021-01 | 0.035 | 0.022 |
| 2021-07 | 0.037 | 0.018 |
| 2022-01 | 0.044 | 0.023 |
Ephemeris comparison
Difference between NIMAv1 and JPL74 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.