How many nodal planes do SIGMA STAR 2pz have??

sigma star 2pz orbital contain 1 nodal plane which divides the orbital vertically. Here we have taken z axis as the internuclear axis. 

Remember all nodes are not nodal plane.This can be understood well form the diagram given below:

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There are three nodal planes in σ* 2pz perpendicular to the internuclear axis.

when two 2pz obitals add destructively along internuclear axis, their opposite lobes cancel out to create another central node in addition to the original two angular nodes. Thus total three nodal planes.

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yea. even i was thinking of 3, but in book , it is written that it has 1 nodal plane !!!

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I saw three angular nodes. the individial 2pz atomic orbitals have 1 node each.

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