I recently finished the Celestarium shawl. I modified a popular edging that is used and have charted it. There are 2 charts on the PDF so that standard or mirror knitters can follow it. Due to the option of knitting this standard or mirror I did not label the / or \. use SSK or K2TOG as needed to get a matching lean per chart symbol.
The edging is a 14 row repeat, but contains 13 beads per row! Make sure you have enough beads to compete this. I used 2 sizes of beads for my shawl and edging. For the shawl I used a triangular bead for the large stars and smaller 6/0 beads for the rest. for the edging I used mostly all 6/0 but used 1 larger one at the points.
My finished shawl is very bead heavy!
How many beads will you need?
total edge stitches divided by 7 (edge stitches needed per repeat). Take that and multiply by 13 (beads per repeat)
Stitches / 7 x 13 = beads needed
this is the PDF file for the star edging
And my ravelry project page for my shawl. I have detailed notes on how i completed it
May the stars be your guide