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	This example is from a stack sample around Abell 1656 matched to SDSS and coloured by SDSS classification (red - stars; black - galaxies). A cut in iPSFMag-iKronMag of 0.05 (shown) does a reasonable job of separating stars and galaxies.

You can calculate this using data from the MeanObject, StackObjectThin or ForcedMeanObject tables. You might improve the separation by combining results from more than one band or using a more sophisticated cut. Note that we do not expect PSF-Kron to be exactly 0.0 for stars, as Kron magnitudes by definition require a correction to take them to total magnitudes.

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	Same sample as above, but now using log10(abs(ipsfLikelihood)) as the separator.

moments

Either momentsR1 or KronRad can be used as a separator (KronRad is 2.5*momentsR1 so it doesn't matter which you use)(again from StackObjectAttributes or StackObjectView).

	Same sample as above, now using log10(imomentR1) as the separator.

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You can also try momentRH, which is the NOT the half light radius, but the expectation value of r^0.5 (again from StackObjectAttributes or StackObjectView) .

	Same sample as above, but now with log10(imomentRH)  as the separator.

Other suggestions

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