(28978) Ixion
Object
| Object |
(28978) Ixion |
| Diameter(1) |
617 km |
| Dynamic class(1) |
plutino |
| Absolute magnitude |
3.44 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
39.412188 ± 0.000095 au |
| Eccentricity |
0.245699206 ± 0.000001301 |
| Inclination |
19.676544954 ± 0.000007723 ° |
| Longitude of ascending node |
71.101947 ± 0.000007 ° |
| Argument of perihelia |
300.438807 ± 0.000404 ° |
| Mean anomaly |
292.972797 ± 0.000440 ° |
| Orbital period |
247.43 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv13 |
| Observation file (documentation) |
omc_ast_NIMAv13.txt |
| bsp file |
28978_Ixion_nima_v13.bsp |
| Date of first observation |
1982-07-17 |
| Date of last observation |
2023-07-28 |
| Number of observations used in the fit |
853 |
| Number of rejected observations |
23 |
| Number of DES observations |
0 |
| Number of MPC observations |
199 |
| Number of unpublished observations |
277 |
| RMS of observations |
0.155 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv13 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.005 |
0.004 |
| 2024-07 |
0.006 |
0.005 |
| 2025-01 |
0.007 |
0.005 |
| 2025-07 |
0.009 |
0.005 |
| 2026-01 |
0.010 |
0.006 |
| 2026-07 |
0.012 |
0.006 |
| 2027-01 |
0.013 |
0.006 |
| 2027-07 |
0.016 |
0.007 |
| 2028-01 |
0.017 |
0.007 |
Ephemeris comparison
Difference between NIMAv13 and JPL21 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