(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 | 0.116971733 ± 0.000000048 |
| Inclination | 4.522442949 ± 0.000005755 ° |
| Longitude of ascending node | 350.738667 ± 0.000059 ° |
| Argument of perihelia | 343.974533 ± 0.000064 ° |
| Mean anomaly | 81.655229 ± 0.000022 ° |
| Orbital period | 11.75 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 659_Nestor_nima_v6.bsp |
| Date of first observation | 1908-03-23 |
| Date of last observation | 2023-04-17 |
| Number of observations used in the fit | 4680 |
| Number of rejected observations | 38 |
| Number of DES observations | 0 |
| Number of MPC observations | 4672 |
| Number of unpublished observations | 46 |
| RMS of observations | 2.539 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2023-01 | 0.031 | 0.025 |
| 2023-07 | 0.024 | 0.018 |
| 2024-01 | 0.035 | 0.026 |
| 2024-07 | 0.025 | 0.019 |
| 2025-01 | 0.034 | 0.026 |
| 2025-07 | 0.026 | 0.019 |
| 2026-01 | 0.032 | 0.024 |
| 2026-07 | 0.028 | 0.019 |
| 2027-01 | 0.031 | 0.021 |
Ephemeris comparison
Difference between NIMAv6 and JPL106 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.