(3317) Paris
This object has a more recent orbit available here
Object
| Object | (3317) Paris |
| Diameter(1) | 119 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 8.40 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 5.221142 ± 0.000000 au |
| Eccentricity | 0.127299731 ± 0.000000022 |
| Inclination | 27.870163635 ± 0.000001567 ° |
| Longitude of ascending node | 135.903461 ± 0.000002 ° |
| Argument of perihelia | 149.979676 ± 0.000005 ° |
| Mean anomaly | 278.616849 ± 0.000003 ° |
| Orbital period | 11.93 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv2 |
| Observation file |
omc_ast_NIMAv2.txt |
| bsp file | 3317_Paris_nima_v2.bsp |
| Date of first observation | 1963-08-21 |
| Date of last observation | 2019-08-04 |
| Number of observations used in the fit | 2232 |
| Number of rejected observations | 2 |
| Number of DES observations | 0 |
| Number of MPC observations | 2113 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.059 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 | 0.018 | 0.003 |
| 2019-07 | 0.019 | 0.002 |
| 2020-01 | 0.026 | 0.008 |
| 2020-07 | 0.034 | 0.008 |
| 2021-01 | 0.033 | 0.011 |
| 2021-07 | 0.051 | 0.017 |
| 2022-01 | 0.037 | 0.012 |
| 2022-07 | 0.057 | 0.012 |
| 2023-01 | 0.039 | 0.007 |
Ephemeris comparison
Difference between NIMAv2 and JPL39 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.