This is a different feathered star than the one pictured.
You can actually "feather" any star, but with the eight pointed ones you can base it on either a variable star or a LeMoyne star. If you use a variable star/sawtooth star the sides of the points are different lengths and have different numbers of "feathers" on each side.
With a LeMoyne star you are working with diamonds, not half square triangles, so there are the same number of "feathers" on each side of the point. (does that make sense?)
When using the 45° diamonds there are lots of variations you can use, each giving the center of the star a different look. Lots of fun to play with.
Have fun,
Pati, in Phx