2021: Sirius Heliacal Rising

The first morning appearance of a star before sunrise is known as the heliacal rising of the star. Sirius, the brightest star, makes its first appearance each year during mid-August from mid-northern latitudes. For 2021, under the best conditions, the star is first visible without optical help on August 11 for latitude 41.7 ° North.

This episode is also available as a blog post: https://whenthecurveslineup.com/2021/04/30/2021-sirius-heliacal-rising/