(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 | 8.70 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.167175 ± 0.000000 au |
| Eccentricity | 0.116971649 ± 0.000000051 |
| Inclination | 4.522446728 ± 0.000006342 ° |
| Longitude of ascending node | 350.738652 ± 0.000059 ° |
| Argument of perihelia | 343.974531 ± 0.000064 ° |
| Mean anomaly | 81.655238 ± 0.000023 ° |
| Orbital period | 11.75 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 659_Nestor_nima_v5.bsp |
| Date of first observation | 1908-03-23 |
| Date of last observation | 2022-07-14 |
| Number of observations used in the fit | 3659 |
| Number of rejected observations | 37 |
| Number of DES observations | 0 |
| Number of MPC observations | 3650 |
| Number of unpublished observations | 46 |
| RMS of observations | 2.859 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.027 | 0.023 |
| 2022-07 | 0.025 | 0.019 |
| 2023-01 | 0.037 | 0.028 |
| 2023-07 | 0.028 | 0.020 |
| 2024-01 | 0.041 | 0.029 |
| 2024-07 | 0.029 | 0.020 |
| 2025-01 | 0.038 | 0.027 |
| 2025-07 | 0.029 | 0.020 |
| 2026-01 | 0.035 | 0.025 |
Ephemeris comparison
Difference between NIMAv5 and JPL91 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.