On the ancient historical and magical precedence of the fixed star Sirius:
There are many modern takes about "gates" related to the time just before the heliacal rise of stars. They're almost always considered positive, but historically that was not the case.
Fixed star Sirius was a fearfully respected star that was most earliest conflated with the Egyptian goddess Sopdet (aka Sothis to the Greeks), later conflated with Isis, and sometimes conflated with Anubis.
Sirius Burning the Sky
There are many modern takes about "gates" related to the time just before the heliacal rise of stars. They're almost always considered positive, but historically that was not the case. Fixed star Sirius was a fearfully respected star associated with multiple psychopomp deities.