We apply a statistical field correction technique originally designed to determine membership of high redshift galaxy clusters to Hubble Space Telescope imaging of the Antlia Dwarf Galaxy ; a galaxy at the very edge of the Local Group .
Using the tip of the red giant branch standard candle method coupled with a simple Sobel edge detection filter we find a new distance to Antlia of 1.31 \pm 0.03 Mpc .
For the first time for a Local Group Member , we compute the concentration , asymmetry and clumpiness ( CAS ) quantitative morphology parameters for Antlia from the distribution of resolved stars in the HST/ACS field , corrected with a new method for contaminants and complement these parameters with the Gini coefficient ( G ) and the second order moment of the brightest 20 per cent of the flux ( M _ { 20 } ) .
We show that it is a classic dwarf elliptical ( C = 2.0 , A = 0.063 , S = 0.077 , G = 0.39 and M _ { 20 } = -1.17 in the F814W band ) , but has an appreciable blue stellar population at its core , confirming on-going star-formation .
The values of asymmetry and clumpiness , as well as Gini and M _ { 20 } are consistent with an undisturbed galaxy .
Although our analysis suggests that Antlia may not be tidally influenced by NGC 3109 it does not necessarily preclude such interaction .