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The Antlia 2 dwarf galaxy is located behind the Galactic disc at a latitude of $b\\sim 11^{\\circ}$ and spans $1.26$ degrees, which corresponds to $\\sim2.9$ kpc at its distance of 130 kpc. While similar in spatial extent to the Large Magellanic Cloud, Antlia 2 is orders of magnitude fainter at $M_V=-9$ mag, making it by far the lowest surface brightness system known (at $\\sim31.9$ mag/arcsec$^2$), $\\sim100$ times more diffuse than the so-called ultra diffuse galaxies. 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