  The Galactic transient black hole candidate (BHC) MAXI~J1659-152 exhibited
temporal and spectral evolution during its very first X-ray outburst (2010)
after its discovery on 25th Sept. 2010. Our recent studies of a few transient
BHCs including MAXI~J1659-152 using Chakrabarti-Titarchuk two-component
advective flow (TCAF) solution as an additive table local model in XSPEC
revealed details of accretion flow dynamics around the black hole (BH). The
TCAF model fitted normalization (N) comes out to be almost constant throughout
the entire outburst consisting of several spectral states. We introduce two
independent methods to determine the mass ($M_{BH}$) of the BHC, namely, {\it
$i)$ keeping TCAF fitted normalization parameter in a narrow range}, and {\it
$ii)$ studying evolution of the Quasi-Periodic Oscillation frequency
($\nu_{QPO}$) with time, fitted with the propagating oscillatory shock (POS)
model}. The predicted mass ranges of the source with these two methods are
$4.7-7.8~M_\odot$, and $5.1-7.4~M_\odot$ respectively. Combining results of
these two methods, we obtain a most probable mass range of the source to be
$4.7-7.8~M_\odot$ or $6^{+1.8}_{-1.3}~M_\odot$.
