(99943) 2005AS2
Object
| Object |
(99943) 2005AS2 |
| Diameter(1) |
28 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
11.70 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460600.5 |
| Semi major axis |
5.295337 ± 0.000000 au |
| Eccentricity |
0.108391298 ± 0.000000020 |
| Inclination |
13.532040754 ± 0.000001297 ° |
| Longitude of ascending node |
116.238764 ± 0.000003 ° |
| Argument of perihelia |
90.306242 ± 0.000014 ° |
| Mean anomaly |
159.705504 ± 0.000010 ° |
| Orbital period |
12.19 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv5 |
| Observation file (documentation) |
omc_ast_NIMAv5.txt |
| bsp file |
99943_2005AS2_nima_v5.bsp |
| Date of first observation |
1996-06-21 |
| Date of last observation |
2023-12-09 |
| Number of observations used in the fit |
2059 |
| Number of rejected observations |
6 |
| Number of DES observations |
38 |
| Number of MPC observations |
1726 |
| Number of unpublished observations |
2 |
| RMS of observations |
0.120 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) |
| 2024-01 |
0.016 |
0.005 |
| 2024-07 |
0.022 |
0.009 |
| 2025-01 |
0.022 |
0.008 |
| 2025-07 |
0.025 |
0.010 |
| 2026-01 |
0.028 |
0.012 |
| 2026-07 |
0.028 |
0.010 |
| 2027-01 |
0.036 |
0.013 |
| 2027-07 |
0.031 |
0.008 |
| 2028-01 |
0.046 |
0.011 |
Ephemeris comparison
Difference between NIMAv5 and JPL41 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