Friday, April 12, 2024

The Winter Triangle (evening)

The lower part of the south and western sky on early April evenings is dominated by the three stars of the Winter Triangle. The prominent asterism, visible even while the waxing crescent moon is shining nearby on Friday,
April 12, is anchored on the bottom by the magnitude -1.45 star Sirius or Alpha Canis Majoris, the brightest star in the night sky. Above Sirius (to
the celestial NNE) shines the white, magnitude 0.34 star Procyon or Alpha Canis Minoris. The third, northwestern vertex is occupied by the reddish, magnitude 0.50 star Betelgeuse or Alpha Orionis. The Winter Triangle first appears in late evening during November. By the end of April it will be disappearing into the western post-sunset twilight.

(Data courtesy Starry Night)
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