(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 | 0.127299748 ± 0.000000008 |
| Inclination | 27.870169769 ± 0.000000444 ° |
| Longitude of ascending node | 135.903455 ± 0.000001 ° |
| Argument of perihelia | 149.979789 ± 0.000005 ° |
| Mean anomaly | 278.616704 ± 0.000005 ° |
| Orbital period | 11.93 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv7 |
| Observation file |
omc_ast_NIMAv7.txt |
| bsp file | 3317_Paris_nima_v7.bsp |
| Date of first observation | 1963-08-21 |
| Date of last observation | 2022-09-03 |
| Number of observations used in the fit | 3419 |
| Number of rejected observations | 18 |
| Number of DES observations | 0 |
| Number of MPC observations | 3201 |
| Number of unpublished observations | 30 |
| RMS of observations | 0.096 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv7 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.004 | 0.001 |
| 2022-07 | 0.007 | 0.002 |
| 2023-01 | 0.006 | 0.002 |
| 2023-07 | 0.011 | 0.002 |
| 2024-01 | 0.010 | 0.002 |
| 2024-07 | 0.012 | 0.003 |
| 2025-01 | 0.013 | 0.003 |
| 2025-07 | 0.012 | 0.004 |
| 2026-01 | 0.015 | 0.005 |
Ephemeris comparison
Difference between NIMAv7 and JPL61 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.