(1437) Diomedes


This object has a more recent orbit available here

Object

Object (1437) Diomedes
Diameter(1) 118 km
Dynamic class(1) trojan
Absolute magnitude 8.30
G slop 0.15
(1) Data from the johnston archive list.

Orbital elements

Epoch (Julian date) 2458600.5
Semi major axis 5.201523 ± 0.000000 au
Eccentricity 0.043492890 ± 0.000000054
Inclination 20.479189476 ± 0.000006373 °
Longitude of ascending node 315.791324 ± 0.000011 °
Argument of perihelia 130.129333 ± 0.000127 °
Mean anomaly 268.498256 ± 0.000134 °
Orbital period 11.86 yr

Ephemeris & Observations

Ephemeris version NIMAv1
Observation file (documentation) omc_ast_NIMAv1.txt
bsp file 1437_Diomedes_nima_v1.bsp
Date of first observation 1931-02-17
Date of last observation 2019-01-07
Number of observations used in the fit 1838
Number of rejected observations 29
Number of DES observations 0
Number of MPC observations 1867
Number of unpublished observations 0
RMS of observations 0.542 arcsec

Residuals

residual plot

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 0.014 0.013
2018-07 0.018 0.017
2019-01 0.015 0.014
2019-07 0.022 0.019
2020-01 0.022 0.020
2020-07 0.028 0.022
2021-01 0.033 0.028
2021-07 0.033 0.021
2022-01 0.047 0.027

Ephemeris comparison

residual plot

Difference between NIMAv1 and JPL60 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.