(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 | 0.127299705 ± 0.000000035 |
| Inclination | 27.870168579 ± 0.000001610 ° |
| Longitude of ascending node | 135.903463 ± 0.000005 ° |
| Argument of perihelia | 149.979768 ± 0.000027 ° |
| Mean anomaly | 278.616712 ± 0.000024 ° |
| Orbital period | 11.93 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv6 |
| Observation file |
omc_ast_NIMAv6.txt |
| bsp file | 3317_Paris_nima_v6.bsp |
| Date of first observation | 1963-08-21 |
| Date of last observation | 2021-08-10 |
| Number of observations used in the fit | 2719 |
| Number of rejected observations | 12 |
| Number of DES observations | 0 |
| Number of MPC observations | 2703 |
| Number of unpublished observations | 28 |
| RMS of observations | 0.354 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) |
| 2021-01 | 0.003 | 0.003 |
| 2021-07 | 0.004 | 0.004 |
| 2022-01 | 0.006 | 0.005 |
| 2022-07 | 0.018 | 0.009 |
| 2023-01 | 0.016 | 0.008 |
| 2023-07 | 0.032 | 0.011 |
| 2024-01 | 0.028 | 0.009 |
| 2024-07 | 0.036 | 0.011 |
| 2025-01 | 0.038 | 0.010 |
Ephemeris comparison
Difference between NIMAv6 and JPL55 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.