- 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 about Algol;
– How to find Algol in Perseus? (map)
– Deaf astronomer John Goodricke.
o - Below is a list of upcoming minima for Algol (Beta Persei) to be seen in the sky, well-placed for UK observers.
– 2026 Algol Minima
– 2027 Algol Minima
– 2028 Algol Minima
– 2029 Algol Minima
– 2030 Algol Minima
British Summer Time (BST) is the daylight saving time used in the UK, where clocks are set one hour ahead of Greenwich Mean Time (GMT) from the last Sunday in March to the last Sunday in October – this time zone is used in the following list of upcoming minima for Algol.
2026 Algol Minima
2026 Algol Minima
To be seen in the sky, well-placed for the UK Observers.
oooo
January
Friday 9th
Monday 12th
23:01 pm
20:10 pm
February
Sunday 1st
Tuesday 24th
21:52 pm
18:41 pm
March
Thursday 19th
18:55 pm
oooo
April
Algol – Not visible high
in the night sky this month.
oooo
May
Algol – Not visible high
in the night sky this month.
oooo
June
Algol – Not visible high
in the night sky this month.
oooo
July
Algol – Not visible high
in the night sky this month.
oooo
August
Monday 8th
Thursday 13th
04:42 am
01:31 am
oooo
September
Wednesday 2nd
Saturday 5th
Tuesday 22nd
Friday 25th
Sunday 27th
03:13 am
00:02 am
04:56 am
01:45 am
22:34 pm
oooo
October
Monday 12th
Thursday 15th
Saturday 17th
Tuesday 20th
05:38 am
02:27 am
23:16 pm
20:05 pm
oooo
November
Wednesday 4th
Saturday 7th
Monday 9th
Thursday 12th
Friday 27th
Sunday 29th
04:10 am
00:59 am
21:48 pm
18:36 pm
02:41 am
23:30 pm
oooo
December
Wednesday 2nd
Saturday 5th
Thursday 17th
Sunday 20th
Wednesday 25th
20:19 pm
17:08 pm
04:24 am
01:13 am
18:50 am
oooo
2027 Algol Minima
2027 Algol Minima
To be seen in the sky, well-placed for the UK Observers.
oooo
January
Thursday 9th
Monday 11th
Thursday 14th
02:55 am
23:44 pm
20:33 am
February
Wednesday 3rd
Saturday 6th
Tuesday 23rd
Friday 26th
22:16 pm
19:04 pm
23:58 pm
20:47 pm
March
Thursday 18th
Sunday 21st
22:30 pm
19:18 pm
oooo
April
Algol – Not visible high
in the night sky this month.
oooo
May
Algol – Not visible high
in the night sky this month.
oooo
June
Algol – Not visible high
in the night sky this month.
oooo
July
Friday 23rd
Monday 26th
03:23 am
00:12 am
oooo
August
Sunday 15th
Thursday 17th
01:54 am
22:43 pm
oooo
September
Saturday 4th
Tuesday 7th
Thursday 9th
Friday 24th
Monday 27th
Wednesday 29th
03:37 am
00:26 am
21:14 pm
04:19 am (GMT)
01:08 am (GMT)
21:57 pm (GMT)
oooo
October
Thursday 14th
Sunday 17th
Tuesday 19th
Friday 22nd
06:02 am
02:51 am
23:40 pm
20:28 pm
oooo
November
Saturday 6th
Tuesday 9th
Thursday 11th
Sunday 14th
Friday 26th
Monday 29th
04:33 am
01:22 am
22:11 pm
19:00 pm
06:16 am
03:05 am
oooo
December
Wednesday 1st
Saturday 4th
Tuesday 7th
Sunday 19th
Wednesday 22nd
Friday 24th
Monday 27th
23:54 pm
20:43 pm
17:31 pm
04:47 am
01:36 am
22:25 pm
19:14 pm
oooo
2028 Algol Minima
2028 Algol Minima
To be seen in the sky, well-placed for the UK Observers.
oooo
January
Tuesday 11th
Friday 14th
Sunday 16th
Wednesday 19th
03:19 am
00:08 am
20:57 pm
17:45 am
February
Thursday 3rd
Saturday 5th
Tuesday 8th
Monday 28th
01:50 am
22:39 pm
19:28 pm
21:11 pm
March
Wednesday 22nd
19:42 pm
oooo
April
Algol – Not visible high
in the night sky this month.
oooo
May
Algol – Not visible high
in the night sky this month.
oooo
June
Algol – Not visible high
in the night sky this month.
oooo
July
Tuesday 4th
Monday 24th
Thursday 27th
02:04 am
03:46 am
00:35 am
oooo
August
Wednesday 16th
Friday 18th
02:18 am
23:07 pm
oooo
September
Tuesday 5th
Friday 8th
Sunday 10th
Monday 25th
Thursday 28th
Saturday 30th
04:00 am
00:49 am
21:38 pm
05:43 am
02:32 am
23:21 pm
oooo
October
Tuesday 3rd
Wednesday 18th
Saturday 21st
Monday 23rd
20:09 pm
04:14 am
01:03 am
21:52 pm
oooo
November
Tuesday 7th
Friday 10th
Sunday 12th
Wednesday 15th
04:57 am
01:46 am
22:35 pm
19:23 pm
oooo
December
Sunday 3rd
Tuesday 5th
Friday 8th
Saturday 23rd
Monday 25th
Thursday 28th
00:17 am
21:06 pm
17:55 pm
02:00 am
22:49 pm
19:37 pm
2029 Algol Minima
2029 Algol Minima
To be seen in the sky, well-placed for the UK Observers.
oooo
January
Monday 15th
Wednesday 17th
Saturday 20th
00:31 am
21:20 pm
18:09 am
February
Tuesday 6th
Friday 9th
23:03 pm
19:51 pm
March
Thursday 1st
Sunday 4th
Saturday 24th
21:34 am
18:23 pm
20:05 pm
oooo
April
Algol – Not visible high
in the night sky this month.
oooo
May
Algol – Not visible high
in the night sky this month.
oooo
June
Algol – Not visible high
in the night sky this month.
oooo
July
Thursday 26th
04:10 am
oooo
August
Saturday 18th
Monday 20th
02:41 am
23:30 pm
oooo
September
Friday 7th
Monday 10th
Wednesday 12th
04:24 pm
01:13 am
22:01 pm
oooo
October
Tuesday 2nd
Wednesday 5th
Saturday 20th
Tuesday 23rd
Thursday 25th
Sunday 28th
23:44 pm
20:33 pm
04:38 pm
01:27 am
22:15 am
18:04 pm (GMT)
oooo
November
Friday 9th
Monday 12th
Wednesday 14th
Saturday 17th
05:20 am
02:09 am
22:58 pm
19:47 pm
oooo
December
Sunday 2nd
Wednesday 5th
Friday 7th
Monday 10th
Tuesday 25th
Thursday 27th
Sunday 30th
03:52 am
00:41 am
21:30 pm
18:18 pm
02:23 am
23:12 pm
20:01 pm
2030 Algol Minima
2030 Algol Minima
To be seen in the sky, well-placed for the UK Observers.
oooo
January
Thursday 17th
Saturday 19th
Tuesday 22nd
00:55 am
21:44 pm
18:32 pm
February
Friday 8th
Monday 11th
23:26 pm
20:15 pm
March
Sunday 3rd
Wednesday 6th
21:58 pm
18:46 pm
oooo
April
Monday 15th
23:12 pm
oooo
May
Algol – Not visible high
in the night sky this month.
oooo
June
Algol – Not visible high
in the night sky this month.
oooo
July
Monday 8th
Sunday 28th
02:51 am
04:33 am
oooo
August
Tuesday 20th
Thursday 22nd
03:05 am
23:54 pm
oooo
September
Monday 9th
Thursday 12th
Saturday 14th
04:47 am
01:36 am
22:25 pm
oooo
October
Wednesday 2nd
Saturday 5th
Monday 7th
Tuesday 22nd
Friday 25th
Sunday 27th
Wednesday 30th
03:19 am
00:08 am
20:56 pm
05:01 am
01:50 am
22:39 pm (GMT)
19:28 pm (GMT)
oooo
November
Monday 11th
Thursday 14th
Saturday 16th
Tuesday 19th
05:44 am
02:33 am
23:22 pm
20:10 pm
oooo
December
Wednesday 4th
Saturday 7th
Monday 9th
Thursday 12th
Friday 27th
Sunday 29th
04:14 am
01:04 am
21:53 pm
18:42 pm
02:47 am
23:36 pm
oooo
GMT = Greenwich Mean Time
Mean Solar time at the Royal Observatory in Greenwich,
located at 0° longitude, Greenwich, London, United Kingdom.)
oooo
BST = British Summer Time
BST is the daylight saving time used in the UK,
where clocks are set one hour ahead of Greenwich Mean Time (GMT)
from the last Sunday in March to the last Sunday in October.
oooo
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