Derekscope

Your guide to the night sky this month

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Algol Minima

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• The bright variable star Beta Persei (Algol) reaches its minimum brightness at 19.55 pm in the evening on Thursday 27th November and will be visible from the UK.
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• Here’s a list of upcoming minimum brightness times for Algol – read more.

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• The Moon will be in its First Quarter phase, reaching exact alignment 50% disk illumination at 07.38 / 7.38am in the constellation Aquarius.
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• The Moon will be well-placed in the southern sky during the evening hours.
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• Sunset is around 16:00 / 4pm, so the Moon will be visible shortly after twilight.
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• Capturing lunar features like craters and mountain ranges along the terminator ~ great for astrophotography.
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Algol Minima

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• The bright variable star Beta Persei (Algol) reaches its minimum brightness at 23:07 pm in the late night on Thursday 27th November and will be visible from the UK.
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• Here’s a list of upcoming minimum brightness times for Algol – read more.

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Algol
The bright variable Star Algol
reaches minimum brightness.
(23:07 / 11.07pm)
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• The bright variable Star Beta Persei (Algol) reaches minimum brightness.
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• This variable star in Perseus varies from its brightest at magnitude +2.1, dropping to +3.4.
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• Even when dimmed, Algol is still visible to the naked eye.
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• Here’s a list of upcoming minimum brightness times for Algol that are well-placed for UK observers in November 2025.
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• Read more – Algol
  – How to find Algol in Perseus?
  – Deaf astronomer John Goodricke

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Algol Minima

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• The bright variable star Beta Persei (Algol) reaches its minimum brightness at 02:19 am in the early morning on Tuesday 25th November and will be visible from the UK.
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• Here’s a list of upcoming minimum brightness times for Algol – read more.

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Ganymede’s shadow on Jupiter

• On the night of Monday 24th into the early hours of Tuesday 25th November 2025, Ganymede’s shadow will transit across Jupiter’s disc, creating a striking celestial event visible from parts of Earth.
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• Use a telescope with decent magnification to spot the shadow ~ it appears as a crisp, dark dot against Jupiter’s bright surface.
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Algol Minima

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• The bright variable star Beta Persei (Algol) reaches its minimum brightness at 02:19 am in the early morning on Tuesday 25th November and will be visible from the UK.
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• Here’s a list of upcoming minimum brightness times for Algol – read more.

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Algol
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• The bright variable star Beta Persei (Algol) reaches its minimum brightness at 05:29 am in the early morning on Saturday 22nd November and will be visible from the UK.
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• Here’s a list of upcoming minimum brightness times for Algol – read more.

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Titan transits Saturn tonight

• Tonight offers a stunning view: Titan hovering near the curve of Saturn’s rings.
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• Astrophotography opportunity to glimpse Titan near Saturn’s rings.
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