(8405) Asbolus
This object has a more recent orbit available here
Object
| Object | (8405) Asbolus |
| Diameter(1) | 84 km |
| Dynamic class(1) | Centaur |
| Absolute magnitude | 9.10 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458600.5 |
| Semi major axis | 17.973438 ± 0.000016 au |
| Eccentricity | 0.621819299 ± 0.000000388 |
| Inclination | 17.627889003 ± 0.000014739 ° |
| Longitude of ascending node | 6.032544 ± 0.000056 ° |
| Argument of perihelia | 290.142839 ± 0.000047 ° |
| Mean anomaly | 79.012801 ± 0.000114 ° |
| Orbital period | 76.20 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv5 |
| Observation file |
omc_ast_NIMAv5.txt |
| bsp file | 8405_Asbolus_nima_v5.bsp |
| Date of first observation | 1995-03-28 |
| Date of last observation | 2018-09-14 |
| Number of observations used in the fit | 519 |
| Number of rejected observations | 13 |
| Number of DES observations | 0 |
| Number of MPC observations | 512 |
| Number of unpublished observations | 20 |
| RMS of observations | 0.450 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv5 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2020-01 | 0.040 | 0.018 |
| 2020-07 | 0.043 | 0.016 |
| 2021-01 | 0.047 | 0.019 |
| 2021-07 | 0.049 | 0.017 |
| 2022-01 | 0.054 | 0.020 |
| 2022-07 | 0.056 | 0.019 |
| 2023-01 | 0.062 | 0.021 |
| 2023-07 | 0.063 | 0.020 |
| 2024-01 | 0.069 | 0.022 |
Ephemeris comparison
Difference between NIMAv5 and JPL44 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.