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The Trifid Star

ADS 10991 is the central star of the Trifid Nebula (M 20). The system is made of three main sequence stars, of these is star A an extremely hot blue star. With its radiation it destroys the nebula and the protostars there, which are still in the process of forming.

Constellation: Sagittarius
Distance: 5200 light-years

ADS 10991 A

Spectral class: O7
Visual magnitude: 7.6
  

ADS 10991 B

Spectral class: A2
Visual magnitude: 10.7
  

ADS 10991 C

Spectral class: B6
Visual magnitude: 8.7

Back: List of Special Stars part 2 		    The Trifid Star
Photo: Gemini Observatory/Ingrid Braul, Southlands Elementary, Vancouver BC
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