  Measuring the physical parameters of Coronal Mass Ejections (CMEs),
particularly their entrained magnetic field, is crucial for understanding their
physics and for assessing their geo-effectiveness. At the moment, only remote
sensing techniques can probe these quantities in the corona, the region where
CMEs form and acquire their defining characteristics. Radio observations offer
the most direct means for estimating the magnetic field when gyrosynchontron
emission is detected. In this work we measure various CME plasma parameters,
including its magnetic field, by modelling the gyrosynchrotron emission from a
CME. The dense spectral coverage over a wide frequency range provided by the
Murchison Widefield Array (MWA) affords a much better spectral sampling than
possible before. The MWA images also provide much higher imaging dynamic range,
enabling us to image these weak emissions. Hence we are able to detect radio
emission from a CME at larger distances ($4.73 R_\odot$) than have been
reported before. The flux densities reported here are amongst the lowest
measured in similar works. Our ability to make extensive measurements on a slow
and otherwise unremarkable CME suggest that with the availability of data from
the new generation instruments like the MWA, it should now be possible to make
routine direct detections of radio counterparts of CMEs.
