Spica

Constellation:
Virgo

http://cf.ltkcdn.net/horoscopes/images/std/156310-425x258-virgo-constellation.jpg
Star: 
Spica

http://www.glyphweb.com/esky/_images/photos/spica.gif
Chemical Composition: 
Hydrogen and Helium are most abundant

Location: 
Right Ascension: 13h 25m 12s
Declination: -11° 9' 41"

Spectrum Analysis of most abundant chemicals: 
Hydrogen

Helium:

Stellar Classification: 
Primary star-B1 (Blue Subgiant)
Secondary star-B1 (Blue dwarf)

Citations: 

http://www.glyphweb.com/esky/stars/spica.html
http://www.astronoo.com/en/stars.html
http://www.umop.net/spctelem.htm