(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 | 8.71 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2456426.318846887 |
| Semi major axis | 5.188986 ± 0.000000 au |
| Eccentricity | 0.114437371 ± 0.000000096 |
| Inclination | 4.520875356 ± 0.000006502 ° |
| Longitude of ascending node | 350.871988 ± 0.000066 ° |
| Argument of perihelia | 342.136308 ± 0.000077 ° |
| Mean anomaly | 160.175101 ± 0.000030 ° |
| Orbital period | 11.82 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 659_Nestor_nima_v4.bsp |
| Date of first observation | 1908-03-23 |
| Date of last observation | 2020-11-14 |
| Number of observations used in the fit | 2996 |
| Number of rejected observations | 32 |
| Number of DES observations | 0 |
| Number of MPC observations | 2982 |
| Number of unpublished observations | 46 |
| RMS of observations | 3.158 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2021-01 | 0.024 | 0.020 |
| 2021-07 | 0.028 | 0.020 |
| 2022-01 | 0.036 | 0.028 |
| 2022-07 | 0.032 | 0.021 |
| 2023-01 | 0.047 | 0.031 |
| 2023-07 | 0.034 | 0.021 |
| 2024-01 | 0.049 | 0.031 |
| 2024-07 | 0.034 | 0.021 |
| 2025-01 | 0.044 | 0.029 |
Ephemeris comparison
Difference between NIMAv4 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.