(99943) 2005AS2
This object has a more recent orbit available here
Object
| Object | (99943) 2005AS2 |
| Diameter(1) | 28 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 11.71 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2459800.5 |
| Semi major axis | 5.296161 ± 0.000000 au |
| Eccentricity | 0.109014653 ± 0.000000016 |
| Inclination | 13.538405999 ± 0.000000394 ° |
| Longitude of ascending node | 116.260607 ± 0.000001 ° |
| Argument of perihelia | 90.611283 ± 0.000009 ° |
| Mean anomaly | 94.559083 ± 0.000006 ° |
| Orbital period | 12.19 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv3 |
| Observation file |
omc_ast_NIMAv3.txt |
| bsp file | 99943_2005AS2_nima_v3.bsp |
| Date of first observation | 1996-06-21 |
| Date of last observation | 2022-07-05 |
| Number of observations used in the fit | 1812 |
| Number of rejected observations | 6 |
| Number of DES observations | 38 |
| Number of MPC observations | 1479 |
| Number of unpublished observations | 2 |
| RMS of observations | 0.120 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2022-01 | 0.006 | 0.001 |
| 2022-07 | 0.011 | 0.002 |
| 2023-01 | 0.009 | 0.001 |
| 2023-07 | 0.015 | 0.004 |
| 2024-01 | 0.013 | 0.004 |
| 2024-07 | 0.018 | 0.007 |
| 2025-01 | 0.018 | 0.006 |
| 2025-07 | 0.020 | 0.008 |
| 2026-01 | 0.023 | 0.009 |
Ephemeris comparison
Difference between NIMAv3 and JPL32 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.