I (Brian Tung) wrote:
Here's the write-up, with pictures.

http://astro.isi.edu/notes/

As usual, a minute after I posted this, I realized I could take out a
chunk of text that was entirely superfluous, and fixed it.

Some of you are too fast, though: There were already two downloads.
Brave souls, I think.

--
Brian Tung
The Astronomy Corner at http://astro.isi.edu/
Unofficial C5+ Home Page at http://astro.isi.edu/c5plus/
The PleiadAtlas Home Page at http://astro.isi.edu/pleiadatlas/
My Own Personal FAQ (SAA) at http://astro.isi.edu/reference/faq.txt