(99943) 2005AS2
Object
| Object |
(99943) 2005AS2 |
| Diameter(1) |
28 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
11.71 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2459800.5 |
| Semi major axis |
5.296161 ± 0.000000 au |
| Eccentricity |
0.109014645 ± 0.000000020 |
| Inclination |
13.538405791 ± 0.000001298 ° |
| Longitude of ascending node |
116.260607 ± 0.000003 ° |
| Argument of perihelia |
90.611287 ± 0.000014 ° |
| Mean anomaly |
94.559080 ± 0.000011 ° |
| Orbital period |
12.19 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv4 |
| Observation file (documentation) |
omc_ast_NIMAv4.txt |
| bsp file |
99943_2005AS2_nima_v4.bsp |
| Date of first observation |
1996-06-21 |
| Date of last observation |
2022-10-19 |
| Number of observations used in the fit |
1952 |
| Number of rejected observations |
6 |
| Number of DES observations |
38 |
| Number of MPC observations |
1619 |
| Number of unpublished observations |
2 |
| RMS of observations |
0.120 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) |
| 2023-01 |
0.011 |
0.003 |
| 2023-07 |
0.018 |
0.007 |
| 2024-01 |
0.016 |
0.006 |
| 2024-07 |
0.022 |
0.009 |
| 2025-01 |
0.022 |
0.009 |
| 2025-07 |
0.025 |
0.010 |
| 2026-01 |
0.029 |
0.012 |
| 2026-07 |
0.028 |
0.010 |
| 2027-01 |
0.036 |
0.013 |
Ephemeris comparison
Difference between NIMAv4 and JPL37 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