# Missing radio source coordinates in G/T measurement technique ITU-R S.733.2

Section 3 ‘Suitable radio stars’ of this recommendation lists the different stars/nebula and their corresponding flux-densities that can be used in the G/T measurement. There is no reference to the coordinates these flux densities were measured at. Some of the Nebula have large angular extension and I’m not sure where to point my antenna.

Is there a list of celestial coordinates of the radio stars used in this recommendation?

http://www.itu.int/dms_pubrec/itu-r/rec/s/R-REC-S.733-2-200001-I!!PDF-E.pdf

-

$\theta \sim \lambda / D$,
where $\theta$ is your resolution in radians, $\lambda$ is the wavelength, and $D$ is the diameter of your dish. If your source is smaller than your resolution, then the large scale structure does not matter.