(50000) Quaoar
Object
Object |
(50000) Quaoar |
Diameter(1) |
1111 km |
Dynamic class(1) |
cubewano-hot |
Absolute magnitude |
2.50 |
G slop |
0.15 |
Orbital elements
Epoch (Julian date) |
2460800.5 |
Semi major axis |
43.163010 ± 0.000054 au |
Eccentricity |
0.036646104 ± 0.000000631 |
Inclination |
7.991242136 ± 0.000000483 ° |
Longitude of ascending node |
189.005210 ± 0.000024 ° |
Argument of perihelia |
163.783746 ± 0.001416 ° |
Mean anomaly |
290.969056 ± 0.001406 ° |
Orbital period |
283.58 yr |
Ephemeris & Observations
Ephemeris version |
NIMAv20 |
Observation file (documentation) |
omc_ast_NIMAv20.txt |
bsp file |
50000_Quaoar_nima_v20.bsp |
Date of first observation |
1954-05-25 |
Date of last observation |
2025-06-12 |
Number of observations used in the fit |
1521 |
Number of rejected observations |
74 |
Number of DES observations |
0 |
Number of MPC observations |
725 |
Number of unpublished observations |
536 |
RMS of observations |
0.099 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv20 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
date |
σα (arcsec) |
σδ (arcsec) |
2024-01 |
0.002 |
0.002 |
2024-07 |
0.002 |
0.002 |
2025-01 |
0.002 |
0.002 |
2025-07 |
0.003 |
0.002 |
2026-01 |
0.003 |
0.002 |
2026-07 |
0.004 |
0.002 |
2027-01 |
0.004 |
0.002 |
2027-07 |
0.005 |
0.002 |
2028-01 |
0.005 |
0.002 |
Ephemeris comparison
Difference between NIMAv20 and JPL48 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.
Previous NIMA versions