(2060) Chiron
This object has a more recent orbit available here
Object
| Object | (2060) Chiron |
| Diameter(1) | 210 km |
| Dynamic class(1) | Centaur |
| Absolute magnitude | 5.80 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 13.669120 ± 0.000001 au |
| Eccentricity | 0.380449019 ± 0.000000052 |
| Inclination | 6.946658092 ± 0.000003478 ° |
| Longitude of ascending node | 209.214334 ± 0.000024 ° |
| Argument of perihelia | 339.816190 ± 0.000030 ° |
| Mean anomaly | 165.053215 ± 0.000028 ° |
| Orbital period | 50.54 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv12 |
| Observation file |
omc_ast_NIMAv12.txt |
| bsp file | 2060_Chiron_nima_v12.bsp |
| Date of first observation | 1895-04-24 |
| Date of last observation | 2020-11-14 |
| Number of observations used in the fit | 3506 |
| Number of rejected observations | 69 |
| Number of DES observations | 7 |
| Number of MPC observations | 3160 |
| Number of unpublished observations | 408 |
| RMS of observations | 0.453 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) |
| 2021-01 | 0.007 | 0.006 |
| 2021-07 | 0.009 | 0.007 |
| 2022-01 | 0.008 | 0.007 |
| 2022-07 | 0.010 | 0.008 |
| 2023-01 | 0.010 | 0.008 |
| 2023-07 | 0.012 | 0.008 |
| 2024-01 | 0.012 | 0.009 |
| 2024-07 | 0.015 | 0.009 |
| 2025-01 | 0.014 | 0.010 |
Ephemeris comparison
Difference between NIMAv12 and JPL137 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.