Debris discs are the dusty aftermath of planet formation processes around main-sequence stars . Analysis of these discs is often hampered by the absence of any meaningful constraint on the location and spatial extent of the disc around its host star . Multi-wavelength , resolved imaging ameliorates the degeneracies inherent in the modelling process , making such data indispensable in the interpretation of these systems . The Herschel Space Observatory observed HD 105211 ( \eta Cru , HIP 59072 ) with its PACS instrument in three far-infrared wavebands ( 70 , 100 and 160 \mu m ) . Here we combine these data with ancillary photometry spanning optical to far-infrared wavelengths in order to determine the extent of the circumstellar disc . The spectral energy distribution and multi-wavelength resolved emission of the disc are simultaneously modelled using a radiative transfer and imaging codes . Analysis of the Herschel /PACS images reveals the presence of extended structure in all three PACS images . From a radiative transfer model we derive a disc extent of 87.0 \pm 2.5 au , with an inclination of 70.7 \pm 2.2 \degr to the line of sight and a position angle of 30.1 \pm 0.5 \degr . Deconvolution of the Herschel images reveal a potential asymmetry but this remains uncertain as a combined radiative transfer and image analysis replicate both the structure and the emission of the disc using a single axisymmetric annulus .