The Leo I Group. - We adopt the Cepheid distance to M96 (NGC 3368) and
NGC 3489 from Kennicut et al. (1998).
A6. THE LEO I GROUP
All the galaxies classified as certain members are within
2^deg^ x 2^deg^ and 230 km s^-1^. About 8^deg^ northeast, and at the
same systemic velocity as the Leo I group (as defined above) is the very
tight quartet formed by NGC 3599, NGC 3605, NGC 3607, and NGC 3608. The
SBF distances to these galaxies place the group over 1 mag farther than
Leo I, excluding physical associations between the two groups. About
6^deg^ east we find a tight quartet formed by the late-type spirals
NGC 3623, NGC 3627, NGC 3628, and NGC 3593 at the same systemic velocity
as, and possibly associated with, the Leo I group. All the galaxies
listed as certain members of the Leo I group are also classified as such
in the N93 (group 50) and T88 (Leo Spur, group +7) catalogs.