名稱	網址
International Occultation Timing Association Grazing Occultation Section	http://www.sky.net/~robinson/iota.htm
IOTA Asteroid Occultation Section	http://www.anomalies.com/iota/splash.htm
American Association of Variable Star Observers	http://www.aavso.org/
Hubble Space Telescope Amateur Proposal Information	http://www.stsci.edu/amtprop.html