(56976) 2000SS161
This object has a more recent orbit available here
Object
| Object | (56976) 2000SS161 |
| Diameter(1) | 30 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 11.50 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 5.240419 ± 0.000001 au |
| Eccentricity | 0.034588780 ± 0.000000159 |
| Inclination | 13.241444474 ± 0.000010019 ° |
| Longitude of ascending node | 76.196693 ± 0.000040 ° |
| Argument of perihelia | 324.758714 ± 0.000149 ° |
| Mean anomaly | 123.474571 ± 0.000174 ° |
| Orbital period | 12.00 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 56976_2000SS161_nima_v1.bsp |
| Date of first observation | 1990-11-22 |
| Date of last observation | 2018-06-10 |
| Number of observations used in the fit | 875 |
| Number of rejected observations | 0 |
| Number of DES observations | 6 |
| Number of MPC observations | 869 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.449 arcsec |
Residuals
Residuals in right ascension and declination compared to NIMAv1 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.
Orbit quality
| date | σα (arcsec) | σδ (arcsec) |
| 2018-01 | 0.046 | 0.039 |
| 2018-07 | 0.042 | 0.033 |
| 2019-01 | 0.052 | 0.039 |
| 2019-07 | 0.055 | 0.041 |
| 2020-01 | 0.061 | 0.040 |
| 2020-07 | 0.077 | 0.051 |
| 2021-01 | 0.072 | 0.037 |
| 2021-07 | 0.105 | 0.053 |
| 2022-01 | 0.081 | 0.032 |
Ephemeris comparison
Difference between NIMAv1 and JPL27 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.