(56976) 2000SS161
Object
| Object |
(56976) 2000SS161 |
| Diameter(1) |
30 km |
| Dynamic class(1) |
trojan |
| Absolute magnitude |
11.58 |
| G slop |
0.15 |
Orbital elements
| Epoch (Julian date) |
2460800.5 |
| Semi major axis |
5.234899 ± 0.000000 au |
| Eccentricity |
0.035096572 ± 0.000000086 |
| Inclination |
13.242836072 ± 0.000008044 ° |
| Longitude of ascending node |
76.176491 ± 0.000035 ° |
| Argument of perihelia |
323.846294 ± 0.000111 ° |
| Mean anomaly |
338.435837 ± 0.000108 ° |
| Orbital period |
11.98 yr |
Ephemeris & Observations
| Ephemeris version |
NIMAv6 |
| Observation file (documentation) |
omc_ast_NIMAv6.txt |
| bsp file |
56976_2000SS161_nima_v6.bsp |
| Date of first observation |
1990-11-22 |
| Date of last observation |
2024-12-30 |
| Number of observations used in the fit |
1706 |
| Number of rejected observations |
9 |
| Number of DES observations |
6 |
| Number of MPC observations |
1709 |
| Number of unpublished observations |
0 |
| RMS of observations |
0.384 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv6 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date |
σα (arcsec) |
σδ (arcsec) |
| 2024-01 |
0.039 |
0.029 |
| 2024-07 |
0.045 |
0.035 |
| 2025-01 |
0.042 |
0.030 |
| 2025-07 |
0.044 |
0.031 |
| 2026-01 |
0.051 |
0.036 |
| 2026-07 |
0.049 |
0.029 |
| 2027-01 |
0.068 |
0.043 |
| 2027-07 |
0.054 |
0.028 |
| 2028-01 |
0.083 |
0.040 |
Ephemeris comparison
Difference between NIMAv6 and JPL49 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