(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 | 0.127299689 ± 0.000000074 |
| Inclination | 27.870168246 ± 0.000002001 ° |
| Longitude of ascending node | 135.903458 ± 0.000013 ° |
| Argument of perihelia | 149.979775 ± 0.000048 ° |
| Mean anomaly | 278.616709 ± 0.000041 ° |
| Orbital period | 11.93 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 3317_Paris_nima_v4.bsp |
| Date of first observation | 1963-08-21 |
| Date of last observation | 2020-08-31 |
| Number of observations used in the fit | 2605 |
| Number of rejected observations | 11 |
| Number of DES observations | 0 |
| Number of MPC observations | 2593 |
| Number of unpublished observations | 23 |
| RMS of observations | 0.360 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) |
| 2020-01 | 0.007 | 0.007 |
| 2020-07 | 0.008 | 0.008 |
| 2021-01 | 0.014 | 0.011 |
| 2021-07 | 0.030 | 0.021 |
| 2022-01 | 0.029 | 0.019 |
| 2022-07 | 0.059 | 0.029 |
| 2023-01 | 0.045 | 0.020 |
| 2023-07 | 0.065 | 0.021 |
| 2024-01 | 0.056 | 0.015 |
Ephemeris comparison
Difference between NIMAv4 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.