Canis Major
Canis Major is a prominent constellation because of its many bright stars. These include Sirius (Alpha Canis Majoris), the brightest star in the night sky, as well as three other stars above magnitude 2.0. Furthermore, two other stars are thought to have previously outshone all others in the night sky—Adhara (Epsilon Canis Majoris) shone at -3.99 around 4.7 million years ago, and Mirzam (Beta Canis Majoris) peaked at −3.65 around 4.42 million years ago. Another, NR Canis Majoris, will be brightest at magnitude −0.88 in about 2.87 million years' time.
NR Canis Majoris
NR Canis Majoris will eventually become the brightest star in the sky 2.6 million years from now to 3 million years from now, one of 4 different stars in Canis Major to hold that title (Alpha Canis Majoris, Beta Canis Majoris, and Epsilon Canis Majoris). During this period, NR Canis Majoris will be only 14 light years away and appear at -0.88 magnitude, about the same as Canopus today.