(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 | 43.617030 ± 0.000157 au |
| Eccentricity | 0.037567599 ± 0.000002209 |
| Inclination | 7.986991938 ± 0.000029686 ° |
| Longitude of ascending node | 188.775253 ± 0.000414 ° |
| Argument of perihelia | 147.651915 ± 0.004058 ° |
| Mean anomaly | 297.998030 ± 0.004101 ° |
| Orbital period | 288.07 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv12 |
| Observation file |
omc_ast_NIMAv12.txt |
| bsp file | 50000_Quaoar_nima_v12.bsp |
| Date of first observation | 1954-05-25 |
| Date of last observation | 2018-07-26 |
| Number of observations used in the fit | 766 |
| Number of rejected observations | 197 |
| Number of DES observations | 0 |
| Number of MPC observations | 453 |
| Number of unpublished observations | 510 |
| RMS of observations | 0.272 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv12 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.006 | 0.004 |
| 2018-07 | 0.006 | 0.005 |
| 2019-01 | 0.007 | 0.005 |
| 2019-07 | 0.008 | 0.006 |
| 2020-01 | 0.010 | 0.006 |
| 2020-07 | 0.010 | 0.006 |
| 2021-01 | 0.013 | 0.007 |
| 2021-07 | 0.014 | 0.007 |
| 2022-01 | 0.017 | 0.007 |
Ephemeris comparison
Difference between NIMAv12 and JPL33 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.