We report the results of monitoring of V4334 Sgr ( Sakurai ’ s Object ) at 450 \mu m and 850 \mu m with scuba on the James Clerk Maxwell Telescope .
The flux density at both wavelengths has increased dramatically since 2001 , and is consistent with continued cooling of the dust shell in which Sakurai ’ s Object is still enshrouded , and which still dominates the near-infrared emission .
Assuming that the dust shell is optically thin at sub-millimetre wavelengths and optically thick in the near-infrared , the sub-millimetre data imply a mass-loss rate during 2003 of \sim { 3.4 \pm 0.2 } \times 10 ^ { - { 5 } } M _ { \odot } yr ^ { -1 } for a gas-to-dust ratio of 75 .
This is consistent with the evidence from 1 - 5 \mu m observations that the mass-loss is steadily increasing .