(19844) 2000ST317


Object

Object (19844) 2000ST317
Diameter(1) 39 km
Dynamic class(1) trojan
Absolute magnitude 11.07
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2456833.05065579
Semi major axis 5.192449 ± 0.000001 au
Eccentricity 0.049292221 ± 0.000000066
Inclination 40.428324281 ± 0.000010665 °
Longitude of ascending node 207.531658 ± 0.000011 °
Argument of perihelia 105.907860 ± 0.000207 °
Mean anomaly 106.078536 ± 0.000214 °
Orbital period 11.83 yr

Ephemeris & Observations

Ephemeris version NIMAv3
Observation file (documentation) omc_ast_NIMAv3.txt
bsp file 19844_2000ST317_nima_v3.bsp
Date of first observation 1951-07-08
Date of last observation 2020-09-25
Number of observations used in the fit 1467
Number of rejected observations 16
Number of DES observations 28
Number of MPC observations 1455
Number of unpublished observations 0
RMS of observations 0.432 arcsec

Residuals

residual plot

Residuals in right ascension and declination compared to NIMAv3 ephemeris.
Colours indicate the estimated precision in arcsec used as weights in the fitting process.

Orbit quality

date σα (arcsec) σδ (arcsec)
2021-01 0.038 0.026
2021-07 0.058 0.043
2022-01 0.051 0.034
2022-07 0.076 0.049
2023-01 0.061 0.038
2023-07 0.074 0.045
2024-01 0.065 0.036
2024-07 0.061 0.036
2025-01 0.063 0.032

Ephemeris comparison

residual plot

Difference between NIMAv3 and JPL31 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