Pixel size 6.50um
Chip size 6mm x 5mm 752x582 effective.
Looks very promising. Pixel size about right I think. Not too big or too small. Almost identical to the pixel size for the 300D (6.4um), but slightly bigger than the Toucam (5.6).
I would imagine it would be a much better deep sky camera than a planetary/lunar one.
Heres the CCD chip data sheet for the Orion CCD chip for those with a nose for the tech guff.
http://products.sel.sony.com/semi/PDF/ICX259AK.pdf
Cheers