The Cleveland Street Variable Star Observatory and ARCS presents

• Back due to popular demand and the laws of astrophysics

From the neck of the Swan-between Eta Cyg and Albiero

Χ CygniA Mira variable with amazing properties:

Watch Chi Cyg Brighten

• For use at Niles West High School, Skokie Illinois and ARCS teachers through Yerkes Observatory, Williams Bay, Wisconsin

• Rich DeCoster, Science Teacher, Niles West High School

Where is the variable Chi Cygni?

Watch it brighten!

Chi Cyg8-31-08 9-09-08

Chi Cyg Sept. 22, 2008

Chi Cyg 9-18-08 10-03-08

Chi Cyg 10-04-08

Chi Cygni-Mira variable in brightening phase-Fall 2008

Chi Cyg 10-08-2008

Chi Cyg 10-11-08

Updated through Nov. 10-then the clouds prevaled. Chi Cyg hanging

out at about m = 4

Information

• Chi cyg is a long period Mira variable star with a wide range of magnitude variation.

• It also has an interesting range of variation in the maximum brightness it reaches.

• To find information check the American Assn. of Variable Star Observers:

http://www.aavso.org. This site contains information on its light curve, location, etc.

AAVSO Home PagePut “Chi Cyg” here and see what

you can find!