(19844) 2000ST317
This object has a more recent orbit available here
Object
| Object | (19844) 2000ST317 |
| Diameter(1) | 39 km |
| Dynamic class(1) | trojan |
| Absolute magnitude | 10.90 |
| G slop | 0.15 |
(1) Data from the johnston archive list.
Orbital elements
| Epoch (Julian date) | 2458200.5 |
| Semi major axis | 5.191150 ± 0.000001 au |
| Eccentricity | 0.049176946 ± 0.000000132 |
| Inclination | 40.431335825 ± 0.000010722 ° |
| Longitude of ascending node | 207.539625 ± 0.000014 ° |
| Argument of perihelia | 103.892613 ± 0.000175 ° |
| Mean anomaly | 222.243709 ± 0.000179 ° |
| Orbital period | 11.83 yr |
Ephemeris & Observations
| Ephemeris version | NIMAv1 |
| Observation file |
omc_ast_NIMAv1.txt |
| bsp file | 19844_2000ST317_nima_v1.bsp |
| Date of first observation | 1951-07-08 |
| Date of last observation | 2018-06-13 |
| Number of observations used in the fit | 956 |
| Number of rejected observations | 9 |
| Number of DES observations | 28 |
| Number of MPC observations | 937 |
| Number of unpublished observations | 0 |
| RMS of observations | 0.493 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 | 0.055 | 0.041 |
| 2018-07 | 0.051 | 0.035 |
| 2019-01 | 0.055 | 0.034 |
| 2019-07 | 0.059 | 0.034 |
| 2020-01 | 0.058 | 0.031 |
| 2020-07 | 0.073 | 0.043 |
| 2021-01 | 0.066 | 0.034 |
| 2021-07 | 0.093 | 0.052 |
| 2022-01 | 0.075 | 0.037 |
Ephemeris comparison
Difference between NIMAv1 and JPL20 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.