Rigel is the brightest star in Orion and the sixth brightest star in the sky, with an apparent magnitude of 0.18.
The second brightest star is Canopus with an apparent magnitude of -0.72The brightest is Sirius with an apparent magnitude of -1.47
The brightest star in Norma is γ2 Nor with an apparent magnitude of +4.01
Beta Aquarii, Sadalsuud, is the brightest star in Aquarius with an apparent magnitude of 2.89.
Eta Piscium is the brightest star in the constellation Pisces
If by primary, brightest is meant, Zubeneschamali (Beta Librae) is the brightest star in the constellation Libra with an apparent magnitude of 2.61.
Alcyone, with an apparent magnitude of 2.86
Sirius.
It's apparent magnitude
Zeta Puppis, with an apparent magnitude of 2.25 is the brightest.
The brightest star as seen from Earth is the sun. The brightest star in the night sky is Sirius.
Epsilon Sagittarii (Kaus Australis) is the brightest star in the constellation Sagittarius with an apparent visual magnitude of +1.8.
Alpha Persei (Mirfak or Algenib) is the brightest star in the constellation of Perseus.It has an apparent magnitude of 1.79 and an absolute magnitude of -4.50