(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 | 2.40 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 43.616969 ± 0.000081 au |
| Eccentricity | 0.037567323 ± 0.000001879 |
| Inclination | 7.986995111 ± 0.000012478 ° |
| Longitude of ascending node | 188.775332 ± 0.000313 ° |
| Argument of perihelia | 147.653324 ± 0.001902 ° |
| Mean anomaly | 297.996563 ± 0.001911 ° |
| Orbital period | 288.07 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv15 |
| Observation file |
omc_ast_NIMAv15.txt |
| bsp file | 50000_Quaoar_nima_v15.bsp |
| Date of first observation | 1954-05-25 |
| Date of last observation | 2020-08-11 |
| Number of observations used in the fit | 903 |
| Number of rejected observations | 206 |
| Number of DES observations | 0 |
| Number of MPC observations | 586 |
| Number of unpublished observations | 523 |
| RMS of observations | 0.259 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv15 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 | 0.002 |
| 2021-07 | 0.004 | 0.003 |
| 2022-01 | 0.005 | 0.003 |
| 2022-07 | 0.007 | 0.003 |
| 2023-01 | 0.008 | 0.003 |
| 2023-07 | 0.010 | 0.003 |
| 2024-01 | 0.011 | 0.003 |
| 2024-07 | 0.013 | 0.004 |
| 2025-01 | 0.014 | 0.004 |
Ephemeris comparison
Difference between NIMAv15 and JPL40 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.