(32532) Thereus
Object
| Object |
(32532) Thereus |
| Diameter(1) |
86 km |
| Dynamic class(1) |
Centaur |
| Absolute magnitude |
9.04 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
10.623740 ± 0.000002 au |
| Eccentricity |
0.197946289 ± 0.000000146 |
| Inclination |
20.379455500 ± 0.000001264 ° |
| Longitude of ascending node |
205.161551 ± 0.000015 ° |
| Argument of perihelia |
86.905370 ± 0.000035 ° |
| Mean anomaly |
266.178611 ± 0.000067 ° |
| Orbital period |
34.63 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv2 |
| Observation file (documentation) |
omc_ast_NIMAv2.txt |
| bsp file |
32532_Thereus_nima_v2.bsp |
| Date of first observation |
1983-01-13 |
| Date of last observation |
2024-05-12 |
| Number of observations used in the fit |
994 |
| Number of rejected observations |
2 |
| Number of DES observations |
0 |
| Number of MPC observations |
697 |
| Number of unpublished observations |
9 |
| RMS of observations |
0.115 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv2 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.044 |
0.015 |
| 2024-07 |
0.040 |
0.015 |
| 2025-01 |
0.059 |
0.017 |
| 2025-07 |
0.056 |
0.016 |
| 2026-01 |
0.078 |
0.018 |
| 2026-07 |
0.076 |
0.018 |
| 2027-01 |
0.101 |
0.018 |
| 2027-07 |
0.103 |
0.019 |
| 2028-01 |
0.128 |
0.018 |
Ephemeris comparison
Difference between NIMAv2 and JPL61 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