It [Achernar] has a stellar classification of B6 Vep, but despite appearing similar to a main sequence star, it is thought to have recently exhausted the hydrogen in its core and begun to evolve away from the main sequence.

Wikipedia contributors. (2024, November 2). Achernar. In Wikipedia, The Free Encyclopedia. Retrieved 03:14, January 22, 2025, from https://en.wikipedia.org/w/index.php?title=Achernar&oldid=1254874034

Alderamin (stars.astro.illinois.edu) ALDERAMIN (Alpha Cephei). Though Cepheus (the King) is famed in mythology as father to Andromeda, it is far from being one of the sky’s more prominent ancient constellations, its brightest star, Alderamin, just barely second magnitude (2.44).

Achernar (Wikipedia) Achernar is the brightest star in the constellation of Eridanus and the ninth-brightest in the night sky. It has the Bayer designation Alpha Eridani, which is Latinized from α Eridani and abbreviated Alpha Eri or α Eri. The name Achernar applies to the primary component of a binary system. The two components are designated Alpha Eridani A (the primary) and B (the secondary), with the latter known informally as Achernar B. As determined by the Hipparcos astrometry satellite, this system is located at a distance of approximately 139 light-years (43 parsecs) from the Sun.

It [Achernar] has a stellar classification of B6 Vep, but despite appearing similar to a main sequence star, it is thought to have recently exhausted the hydrogen in its core and begun to evolve away from the main sequence.

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