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SDSS J082053.53+000843.4 belongs to the HW Vir family of short period binarysystems and was first identified by Geier in 2011. Whilst three subsequentpapers have focused on the morphology of this system, little has been publishedon the system period and its constancy. Here we provide the first publishedtimes of minima together with a revised ephemeris and a binary period,0.0962404(1)d, that is four orders of magnitude more precise than previousdeclared values.

A new and improved ephemeris for the hot subdwarf eclipsing binary SDSS J082053.53+000843.4