(50000) Quaoar
This object has a more recent orbit available here
Object
| Object | (50000) Quaoar |
| Diameter(1) | 1110 km |
| Dynamic class(1) | cubewano |
| Absolute magnitude | 2.51 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 43.472032 ± 0.000071 au |
| Eccentricity | 0.040988827 ± 0.000000970 |
| Inclination | 7.991223020 ± 0.000000682 ° |
| Longitude of ascending node | 189.090343 ± 0.000031 ° |
| Argument of perihelia | 155.214400 ± 0.001594 ° |
| Mean anomaly | 296.223173 ± 0.001580 ° |
| Orbital period | 286.63 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv18 |
| Observation file |
omc_ast_NIMAv18.txt |
| bsp file | 50000_Quaoar_nima_v18.bsp |
| Date of first observation | 1954-05-25 |
| Date of last observation | 2023-05-26 |
| Number of observations used in the fit | 1113 |
| Number of rejected observations | 162 |
| Number of DES observations | 0 |
| Number of MPC observations | 702 |
| Number of unpublished observations | 475 |
| RMS of observations | 0.076 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv18 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.002 | 0.002 |
| 2022-07 | 0.002 | 0.002 |
| 2023-01 | 0.002 | 0.002 |
| 2023-07 | 0.003 | 0.002 |
| 2024-01 | 0.003 | 0.002 |
| 2024-07 | 0.004 | 0.002 |
| 2025-01 | 0.004 | 0.002 |
| 2025-07 | 0.005 | 0.003 |
| 2026-01 | 0.006 | 0.003 |
Ephemeris comparison
Difference between NIMAv18 and JPL44 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.