(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 ± 0.000001 au |
| Eccentricity | 0.117710938 ± 0.000000114 |
| Inclination | 4.521970822 ± 0.000006554 ° |
| Longitude of ascending node | 350.743643 ± 0.000072 ° |
| Argument of perihelia | 343.198468 ± 0.000074 ° |
| Mean anomaly | 341.519481 ± 0.000024 ° |
| Orbital period | 11.74 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 659_Nestor_nima_v3.bsp |
| Date of first observation | 1908-03-23 |
| Date of last observation | 2020-09-01 |
| Number of observations used in the fit | 2716 |
| Number of rejected observations | 44 |
| Number of DES observations | 0 |
| Number of MPC observations | 2714 |
| Number of unpublished observations | 46 |
| RMS of observations | 0.529 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) |
| 2020-01 | 0.024 | 0.019 |
| 2020-07 | 0.029 | 0.022 |
| 2021-01 | 0.029 | 0.023 |
| 2021-07 | 0.033 | 0.022 |
| 2022-01 | 0.041 | 0.030 |
| 2022-07 | 0.036 | 0.022 |
| 2023-01 | 0.051 | 0.031 |
| 2023-07 | 0.037 | 0.022 |
| 2024-01 | 0.052 | 0.031 |
Ephemeris comparison
Difference between NIMAv3 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.