Oct 15

http://brucegary.net/AsteroidHunting/x.htm http://www.astronomynotes.com/starprop/s4.htm

"http://www.astrophysicsspectator.com/images/diagrams/JohnsonCousinsUBVRI.jpg

"http://www.rpi.edu/dept/phys/courses/Astro_F97/Class10/sep29.html"

"http://spiff.rit.edu/classes/phys440/lectures/filters/filters.html"