(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 | 0.117710934 ± 0.000000113 |
| Inclination | 4.521968778 ± 0.000006152 ° |
| Longitude of ascending node | 350.743642 ± 0.000083 ° |
| Argument of perihelia | 343.198464 ± 0.000084 ° |
| Mean anomaly | 341.519489 ± 0.000024 ° |
| Orbital period | 11.74 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 659_Nestor_nima_v2.bsp |
| Date of first observation | 1908-03-23 |
| Date of last observation | 2019-08-10 |
| Number of observations used in the fit | 2345 |
| Number of rejected observations | 32 |
| Number of DES observations | 0 |
| Number of MPC observations | 2377 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.577 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 | 0.023 | 0.019 |
| 2019-07 | 0.036 | 0.027 |
| 2020-01 | 0.028 | 0.020 |
| 2020-07 | 0.039 | 0.027 |
| 2021-01 | 0.039 | 0.028 |
| 2021-07 | 0.044 | 0.025 |
| 2022-01 | 0.054 | 0.033 |
| 2022-07 | 0.045 | 0.022 |
| 2023-01 | 0.064 | 0.029 |
Ephemeris comparison
Difference between NIMAv2 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.