(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 | 0.621819275 ± 0.000000398 |
| Inclination | 17.627887688 ± 0.000015450 ° |
| Longitude of ascending node | 6.032545 ± 0.000057 ° |
| Argument of perihelia | 290.142836 ± 0.000047 ° |
| Mean anomaly | 79.012808 ± 0.000116 ° |
| Orbital period | 76.20 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv4 |
| Observation file |
omc_ast_NIMAv4.txt |
| bsp file | 8405_Asbolus_nima_v4.bsp |
| Date of first observation | 1995-03-28 |
| Date of last observation | 2018-09-14 |
| Number of observations used in the fit | 476 |
| Number of rejected observations | 11 |
| Number of DES observations | 0 |
| Number of MPC observations | 469 |
| Number of unpublished observations | 18 |
| RMS of observations | 0.469 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv4 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.029 | 0.022 |
| 2018-07 | 0.033 | 0.020 |
| 2019-01 | 0.035 | 0.023 |
| 2019-07 | 0.038 | 0.021 |
| 2020-01 | 0.042 | 0.024 |
| 2020-07 | 0.045 | 0.022 |
| 2021-01 | 0.049 | 0.025 |
| 2021-07 | 0.051 | 0.023 |
| 2022-01 | 0.056 | 0.026 |
Ephemeris comparison
Difference between NIMAv4 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.