Thursday 18th December 2025

oooo
Minimum brightness times for Algol Minima

Here’s a list of upcoming minimum brightness times for Algol (Beta Persei) that are well-placed for UK observers in December 2025.
o
It’s a fantastic opportunity for naked-eye observation or astrophotography, especially on the evening and overnight dates.
o

The bright variable Star Beta Persei (Algol) reaches minimum brightness.
o
This variable star in Perseus varies from its brightest at magnitude +2.1, dropping to +3.4.
o
Even when dimmed, Algol is still visible to the naked eye.
o
Read more – Algol
– How to find Algol in Perseus?
– Deaf astronomer John Goodricke

oooo