  We present a new high-mass membership of the nearby Sco OB2 association based
on HIPPARCOS positions, proper motions and parallaxes and radial velocities
taken from the Kharchenko et al. (2007) catalogue. The Bayesian membership
selection method developed makes no distinction between subgroups of Sco OB2
and utilises linear models in calculation of membership probabilities. We
select 436 members, 88 of which are new members not included in previous
membership selections. We include the classical non members Alpha-Cru and
Beta-Cru as new members as well as the pre-main-sequence stars HIP 79080 and
79081. We also show that the association is well mixed over distances of 8
degrees on the sky, and hence no determination can be made as to the formation
process of the entire association.
