(2060) Chiron
Object
| Object |
(2060) Chiron |
| Diameter(1) |
210 km |
| Dynamic class(1) |
Centaur |
| Absolute magnitude |
5.75 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2456897.139534811 |
| Semi major axis |
13.639713 ± 0.000001 au |
| Eccentricity |
0.381858287 ± 0.000000029 |
| Inclination |
6.936555335 ± 0.000002049 ° |
| Longitude of ascending node |
209.292029 ± 0.000013 ° |
| Argument of perihelia |
339.329140 ± 0.000017 ° |
| Mean anomaly |
132.535778 ± 0.000018 ° |
| Orbital period |
50.38 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv16 |
| Observation file (documentation) |
omc_ast_NIMAv16.txt |
| bsp file |
2060_Chiron_nima_v16.bsp |
| Date of first observation |
1895-04-24 |
| Date of last observation |
2023-08-11 |
| Number of observations used in the fit |
4573 |
| Number of rejected observations |
32 |
| Number of DES observations |
7 |
| Number of MPC observations |
3997 |
| Number of unpublished observations |
432 |
| RMS of observations |
0.090 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv16 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2023-01 |
0.004 |
0.004 |
| 2023-07 |
0.006 |
0.004 |
| 2024-01 |
0.005 |
0.004 |
| 2024-07 |
0.007 |
0.005 |
| 2025-01 |
0.006 |
0.005 |
| 2025-07 |
0.008 |
0.005 |
| 2026-01 |
0.008 |
0.005 |
| 2026-07 |
0.010 |
0.006 |
| 2027-01 |
0.009 |
0.006 |
Ephemeris comparison
Difference between NIMAv16 and JPL152 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