Algol is well known in astrology for its malefic nature, being associated with murders and other unfortunate events, "losing one's head" (by beheading or - figuratively speaking - by the abuse of alcohol), monsters.
However, every almost 3 days there is a 2 hours period when its influence is less stronger - it's the Minima of Algol !
Here's the astronomical info explaining this phenomenon:
Algol is a double, eclipsing variable star in the constellation Perseus, almost as bright as Polaris. Algol's variation in apparent brightness has a periodicity of 2 days, 20 hr and 49 min. The cause of Algol's rapid brightening and subsequent fading are well understood: Algol is actually made of TWO stars, not just one, as seen from Earth being aligned as an "eclipsing binary" star in which one star periodically occults, or covers up, the other in their tight orbit around one-another. Hence, with Algol, this system "eclipses" on a very predictable cycle; the MINIMUM BRIGHTNESS (called the "Minima of Algol") is the brightness of the two stars seen aligned toward Earth, while the MAXIMUM BRIGHTNESS results when both stars are "in full view" (even though we cannot resolve the double nature as the stars are too close).
This page lists the moments of the Minima of Algol for 2009, 2010, 2011 and 2012.
Jan 2, 2009, 16:21 GMT
Jan 5, 2009, 13:10 GMT
Jan 8, 2009, 09:59 GMT
Jan 11, 2009, 06:49 GMT
Jan 14, 2009, 03:38 GMT
Jan 17, 2009, 00:27 GMT
Jan 19, 2009, 21:17 GMT
Jan 22, 2009, 18:06 GMT
Jan 25, 2009, 14:55 GMT
Jan 28, 2009, 11:45 GMT
Jan 31, 2009, 08:34 GMT
Feb 3, 2009, 05:24 GMT
Feb 6, 2009, 02:13 GMT
Feb 8, 2009, 23:02 GMT
Feb 11, 2009, 19:52 GMT
Feb 14, 2009, 16:41 GMT
Feb 17, 2009, 13:30 GMT
Feb 20, 2009, 10:20 GMT
Feb 23, 2009, 07:09 GMT
Feb 26, 2009, 03:59 GMT
Mar 1, 2009, 00:48 GMT
Mar 3, 2009, 21:37 GMT
Mar 6, 2009, 18:27 GMT
Mar 9, 2009, 15:16 GMT
Mar 12, 2009, 12:05 GMT
Mar 15, 2009, 08:55 GMT
Mar 18, 2009, 05:44 GMT
Mar 21, 2009, 02:33 GMT
Mar 23, 2009, 23:23 GMT
Mar 26, 2009, 20:12 GMT
Mar 29, 2009, 17:01 GMT
Apr 1, 2009, 13:51 GMT
Apr 4, 2009, 10:40 GMT
Apr 7, 2009, 07:29 GMT
Apr 10, 2009, 04:18 GMT
Apr 13, 2009, 01:08 GMT
Apr 15, 2009, 21:57 GMT
Apr 18, 2009, 18:46 GMT
Apr 21, 2009, 15:35 GMT
Apr 24, 2009, 12:24 GMT
Apr 27, 2009, 09:13 GMT
Apr 30, 2009, 06:03 GMT
May 3, 2009, 02:52 GMT
May 5, 2009, 23:41 GMT
May 8, 2009, 20:30 GMT
May 11, 2009, 17:19 GMT
May 14, 2009, 14:08 GMT
May 17, 2009, 10:57 GMT
May 20, 2009, 07:46 GMT
May 23, 2009, 04:35 GMT
May 26, 2009, 01:24 GMT
May 28, 2009, 22:13 GMT
May 31, 2009, 19:02 GMT
Jun 3, 2009, 15:51 GMT
Jun 6, 2009, 12:40 GMT
Jun 9, 2009, 09:28 GMT
Jun 12, 2009, 06:17 GMT
Jun 15, 2009, 03:06 GMT
Jun 17, 2009, 23:55 GMT
Jun 20, 2009, 20:44 GMT
Jun 23, 2009, 17:33 GMT
Jun 26, 2009, 14:21 GMT
Jun 29, 2009, 11:10 GMT
Jul 2, 2009, 07:59 GMT
Jul 5, 2009, 04:48 GMT
Jul 8, 2009, 01:36 GMT
Jul 10, 2009, 22:25 GMT
Jul 13, 2009, 19:14 GMT
Jul 16, 2009, 16:02 GMT
Jul 19, 2009, 12:51 GMT
Jul 22, 2009, 09:40 GMT
Jul 25, 2009, 06:28 GMT
Jul 28, 2009, 03:17 GMT
Jul 31, 2009, 00:06 GMT
Aug 2, 2009, 20:54 GMT
Aug 5, 2009, 17:43 GMT
Aug 8, 2009, 14:32 GMT
Aug 11, 2009, 11:20 GMT
Aug 14, 2009, 08:09 GMT
Aug 17, 2009, 04:57 GMT
Aug 20, 2009, 01:46 GMT
Aug 22, 2009, 22:35 GMT
Aug 25, 2009, 19:23 GMT
Aug 28, 2009, 16:12 GMT
Aug 31, 2009, 13:01 GMT
Sep 3, 2009, 09:49 GMT
Sep 6, 2009, 06:38 GMT
Sep 9, 2009, 03:27 GMT
Sep 12, 2009, 00:15 GMT
Sep 14, 2009, 21:04 GMT
Sep 17, 2009, 17:53 GMT
Sep 20, 2009, 14:41 GMT
Sep 23, 2009, 11:30 GMT
Sep 26, 2009, 08:19 GMT
Sep 29, 2009, 05:07 GMT
Oct 2, 2009, 01:56 GMT
Oct 4, 2009, 22:45 GMT
Oct 7, 2009, 19:33 GMT
Oct 10, 2009, 16:22 GMT
Oct 13, 2009, 13:11 GMT
Oct 16, 2009, 10:00 GMT
Oct 19, 2009, 06:49 GMT
Oct 22, 2009, 03:37 GMT
Oct 25, 2009, 00:26 GMT
Oct 27, 2009, 21:15 GMT
Oct 30, 2009, 18:04 GMT
Nov 2, 2009, 14:53 GMT
Nov 5, 2009, 11:42 GMT
Nov 8, 2009, 08:31 GMT
Nov 11, 2009, 05:20 GMT
Nov 14, 2009, 02:09 GMT
Nov 16, 2009, 22:58 GMT
Nov 19, 2009, 19:47 GMT
Nov 22, 2009, 16:36 GMT
Nov 25, 2009, 13:25 GMT
Nov 28, 2009, 10:14 GMT
Dec 1, 2009, 07:03 GMT
Dec 4, 2009, 03:52 GMT
Dec 7, 2009, 00:41 GMT
Dec 9, 2009, 21:30 GMT
Dec 12, 2009, 18:19 GMT
Dec 15, 2009, 15:09 GMT
Dec 18, 2009, 11:58 GMT
Dec 21, 2009, 08:47 GMT
Dec 24, 2009, 05:36 GMT
Dec 27, 2009, 02:25 GMT
Dec 29, 2009, 23:15 GMT
Jan 1, 2010, 20:04 GMT
Jan 4, 2010, 16:53 GMT
Jan 7, 2010, 13:43 GMT
Jan 10, 2010, 10:32 GMT
Jan 13, 2010, 07:21 GMT
Jan 16, 2010, 04:10 GMT
Jan 19, 2010, 01:00 GMT
Jan 21, 2010, 21:49 GMT
Jan 24, 2010, 18:38 GMT
Jan 27, 2010, 15:28 GMT
Jan 30, 2010, 12:17 GMT
Feb 2, 2010, 09:07 GMT
Feb 5, 2010, 05:56 GMT
Feb 8, 2010, 02:45 GMT
Feb 10, 2010, 23:35 GMT
Feb 13, 2010, 20:24 GMT
Feb 16, 2010, 17:14 GMT
Feb 19, 2010, 14:03 GMT
Feb 22, 2010, 10:52 GMT
Feb 25, 2010, 07:42 GMT
Feb 28, 2010, 04:31 GMT
Mar 3, 2010, 01:20 GMT
Mar 5, 2010, 22:10 GMT
Mar 8, 2010, 18:59 GMT
Mar 11, 2010, 15:48 GMT
Mar 14, 2010, 12:38 GMT
Mar 17, 2010, 09:27 GMT
Mar 20, 2010, 06:17 GMT
Mar 23, 2010, 03:06 GMT
Mar 25, 2010, 23:55 GMT
Mar 28, 2010, 20:44 GMT
Mar 31, 2010, 17:34 GMT
Apr 3, 2010, 14:23 GMT
Apr 6, 2010, 11:12 GMT
Apr 9, 2010, 08:01 GMT
Apr 12, 2010, 04:51 GMT
Apr 15, 2010, 01:40 GMT
Apr 17, 2010, 22:29 GMT
Apr 20, 2010, 19:18 GMT
Apr 23, 2010, 16:07 GMT
Apr 26, 2010, 12:57 GMT
Apr 29, 2010, 09:46 GMT
May 2, 2010, 06:35 GMT
May 5, 2010, 03:24 GMT
May 8, 2010, 00:13 GMT
May 10, 2010, 21:02 GMT
May 13, 2010, 17:51 GMT
May 16, 2010, 14:40 GMT
May 19, 2010, 11:29 GMT
May 22, 2010, 08:18 GMT
May 25, 2010, 05:07 GMT
May 28, 2010, 01:56 GMT
May 30, 2010, 22:45 GMT
Jun 2, 2010, 19:34 GMT
Jun 5, 2010, 16:23 GMT
Jun 8, 2010, 13:12 GMT
Jun 11, 2010, 10:00 GMT
Jun 14, 2010, 06:49 GMT
Jun 17, 2010, 03:38 GMT
Jun 20, 2010, 00:27 GMT
Jun 22, 2010, 21:16 GMT
Jun 25, 2010, 18:05 GMT
Jun 28, 2010, 14:53 GMT
Jul 1, 2010, 11:42 GMT
Jul 4, 2010, 08:31 GMT
Jul 7, 2010, 05:20 GMT
Jul 10, 2010, 02:08 GMT
Jul 12, 2010, 22:57 GMT
Jul 15, 2010, 19:46 GMT
Jul 18, 2010, 16:34 GMT
Jul 21, 2010, 13:23 GMT
Jul 24, 2010, 10:12 GMT
Jul 27, 2010, 07:00 GMT
Jul 30, 2010, 03:49 GMT
Aug 2, 2010, 00:38 GMT
Aug 4, 2010, 21:26 GMT
Aug 7, 2010, 18:15 GMT
Aug 10, 2010, 15:04 GMT
Aug 13, 2010, 11:52 GMT
Aug 16, 2010, 08:41 GMT
Aug 19, 2010, 05:29 GMT
Aug 22, 2010, 02:18 GMT
Aug 24, 2010, 23:07 GMT
Aug 27, 2010, 19:55 GMT
Aug 30, 2010, 16:44 GMT
Sep 2, 2010, 13:33 GMT
Sep 5, 2010, 10:21 GMT
Sep 8, 2010, 07:10 GMT
Sep 11, 2010, 03:58 GMT
Sep 14, 2010, 00:47 GMT
Sep 16, 2010, 21:36 GMT
Sep 19, 2010, 18:24 GMT
Sep 22, 2010, 15:13 GMT
Sep 25, 2010, 12:02 GMT
Sep 28, 2010, 08:51 GMT
Oct 1, 2010, 05:39 GMT
Oct 4, 2010, 02:28 GMT
Oct 6, 2010, 23:17 GMT
Oct 9, 2010, 20:06 GMT
Oct 12, 2010, 16:54 GMT
Oct 15, 2010, 13:43 GMT
Oct 18, 2010, 10:32 GMT
Oct 21, 2010, 07:21 GMT
Oct 24, 2010, 04:10 GMT
Oct 27, 2010, 00:58 GMT
Oct 29, 2010, 21:47 GMT
Nov 1, 2010, 18:36 GMT
Nov 4, 2010, 15:25 GMT
Nov 7, 2010, 12:14 GMT
Nov 10, 2010, 09:03 GMT
Nov 13, 2010, 05:52 GMT
Nov 16, 2010, 02:41 GMT
Nov 18, 2010, 23:30 GMT
Nov 21, 2010, 20:19 GMT
Nov 24, 2010, 17:08 GMT
Nov 27, 2010, 13:57 GMT
Nov 30, 2010, 10:46 GMT
Dec 3, 2010, 07:35 GMT
Dec 6, 2010, 04:24 GMT
Dec 9, 2010, 01:13 GMT
Dec 11, 2010, 22:02 GMT
Dec 14, 2010, 18:52 GMT
Dec 17, 2010, 15:41 GMT
Dec 20, 2010, 12:30 GMT
Dec 23, 2010, 09:19 GMT
Dec 26, 2010, 06:08 GMT
Dec 29, 2010, 02:58 GMT
Dec 31, 2010, 23:47 GMT
Jan 3, 2011, 20:36 GMT
Jan 6, 2011, 17:26 GMT
Jan 9, 2011, 14:15 GMT
Jan 12, 2011, 11:04 GMT
Jan 15, 2011, 07:53 GMT
Jan 18, 2011, 04:43 GMT
Jan 21, 2011, 01:32 GMT
Jan 23, 2011, 22:22 GMT
Jan 26, 2011, 19:11 GMT
Jan 29, 2011, 16:00 GMT
Feb 1, 2011, 12:50 GMT
Feb 4, 2011, 09:39 GMT
Feb 7, 2011, 06:28 GMT
Feb 10, 2011, 03:18 GMT
Feb 13, 2011, 00:07 GMT
Feb 15, 2011, 20:57 GMT
Feb 18, 2011, 17:46 GMT
Feb 21, 2011, 14:35 GMT
Feb 24, 2011, 11:25 GMT
Feb 27, 2011, 08:14 GMT
Mar 2, 2011, 05:03 GMT
Mar 5, 2011, 01:53 GMT
Mar 7, 2011, 22:42 GMT
Mar 10, 2011, 19:32 GMT
Mar 13, 2011, 16:21 GMT
Mar 16, 2011, 13:10 GMT
Mar 19, 2011, 10:00 GMT
Mar 22, 2011, 06:49 GMT
Mar 25, 2011, 03:38 GMT
Mar 28, 2011, 00:27 GMT
Mar 30, 2011, 21:17 GMT
Apr 2, 2011, 18:06 GMT
Apr 5, 2011, 14:55 GMT
Apr 8, 2011, 11:45 GMT
Apr 11, 2011, 08:34 GMT
Apr 14, 2011, 05:23 GMT
Apr 17, 2011, 02:12 GMT
Apr 19, 2011, 23:01 GMT
Apr 22, 2011, 19:51 GMT
Apr 25, 2011, 16:40 GMT
Apr 28, 2011, 13:29 GMT
May 1, 2011, 10:18 GMT
May 4, 2011, 07:07 GMT
May 7, 2011, 03:56 GMT
May 10, 2011, 00:45 GMT
May 12, 2011, 21:34 GMT
May 15, 2011, 18:23 GMT
May 18, 2011, 15:12 GMT
May 21, 2011, 12:01 GMT
May 24, 2011, 08:50 GMT
May 27, 2011, 05:39 GMT
May 30, 2011, 02:28 GMT
Jun 1, 2011, 23:17 GMT
Jun 4, 2011, 20:06 GMT
Jun 7, 2011, 16:55 GMT
Jun 10, 2011, 13:44 GMT
Jun 13, 2011, 10:33 GMT
Jun 16, 2011, 07:21 GMT
Jun 19, 2011, 04:10 GMT
Jun 22, 2011, 00:59 GMT
Jun 24, 2011, 21:48 GMT
Jun 27, 2011, 18:37 GMT
Jun 30, 2011, 15:25 GMT
Jul 3, 2011, 12:14 GMT
Jul 6, 2011, 09:03 GMT
Jul 9, 2011, 05:52 GMT
Jul 12, 2011, 02:40 GMT
Jul 14, 2011, 23:29 GMT
Jul 17, 2011, 20:18 GMT
Jul 20, 2011, 17:06 GMT
Jul 23, 2011, 13:55 GMT
Jul 26, 2011, 10:44 GMT
Jul 29, 2011, 07:32 GMT
Aug 1, 2011, 04:21 GMT
Aug 4, 2011, 01:10 GMT
Aug 6, 2011, 21:58 GMT
Aug 9, 2011, 18:47 GMT
Aug 12, 2011, 15:35 GMT
Aug 15, 2011, 12:24 GMT
Aug 18, 2011, 09:13 GMT
Aug 21, 2011, 06:01 GMT
Aug 24, 2011, 02:50 GMT
Aug 26, 2011, 23:39 GMT
Aug 29, 2011, 20:27 GMT
Sep 1, 2011, 17:16 GMT
Sep 4, 2011, 14:04 GMT
Sep 7, 2011, 10:53 GMT
Sep 10, 2011, 07:42 GMT
Sep 13, 2011, 04:30 GMT
Sep 16, 2011, 01:19 GMT
Sep 18, 2011, 22:08 GMT
Sep 21, 2011, 18:56 GMT
Sep 24, 2011, 15:45 GMT
Sep 27, 2011, 12:34 GMT
Sep 30, 2011, 09:23 GMT
Oct 3, 2011, 06:11 GMT
Oct 6, 2011, 03:00 GMT
Oct 8, 2011, 23:49 GMT
Oct 11, 2011, 20:38 GMT
Oct 14, 2011, 17:26 GMT
Oct 17, 2011, 14:15 GMT
Oct 20, 2011, 11:04 GMT
Oct 23, 2011, 07:53 GMT
Oct 26, 2011, 04:42 GMT
Oct 29, 2011, 01:30 GMT
Oct 31, 2011, 22:19 GMT
Nov 3, 2011, 19:08 GMT
Nov 6, 2011, 15:57 GMT
Nov 9, 2011, 12:46 GMT
Nov 12, 2011, 09:35 GMT
Nov 15, 2011, 06:24 GMT
Nov 18, 2011, 03:13 GMT
Nov 21, 2011, 00:02 GMT
Nov 23, 2011, 20:51 GMT
Nov 26, 2011, 17:40 GMT
Nov 29, 2011, 14:29 GMT
Dec 2, 2011, 11:18 GMT
Dec 5, 2011, 08:07 GMT
Dec 8, 2011, 04:56 GMT
Dec 11, 2011, 01:46 GMT
Dec 13, 2011, 22:35 GMT
Dec 16, 2011, 19:24 GMT
Dec 19, 2011, 16:13 GMT
Dec 22, 2011, 13:02 GMT
Dec 25, 2011, 09:52 GMT
Dec 28, 2011, 06:41 GMT
Dec 31, 2011, 03:30 GMT
Jan 3, 2012, 00:19 GMT
Jan 5, 2012, 21:09 GMT
Jan 8, 2012, 17:58 GMT
Jan 11, 2012, 14:47 GMT
Jan 14, 2012, 11:37 GMT
Jan 17, 2012, 08:26 GMT
Jan 20, 2012, 05:15 GMT
Jan 23, 2012, 02:05 GMT
Jan 25, 2012, 22:54 GMT
Jan 28, 2012, 19:43 GMT
Jan 31, 2012, 16:33 GMT
Feb 3, 2012, 13:22 GMT
Feb 6, 2012, 10:11 GMT
Feb 9, 2012, 07:01 GMT
Feb 12, 2012, 03:50 GMT
Feb 15, 2012, 00:40 GMT
Feb 17, 2012, 21:29 GMT
Feb 20, 2012, 18:18 GMT
Feb 23, 2012, 15:08 GMT
Feb 26, 2012, 11:57 GMT
Feb 29, 2012, 08:46 GMT
Mar 3, 2012, 05:36 GMT
Mar 6, 2012, 02:25 GMT
Mar 8, 2012, 23:15 GMT
Mar 11, 2012, 20:04 GMT
Mar 14, 2012, 16:53 GMT
Mar 17, 2012, 13:43 GMT
Mar 20, 2012, 10:32 GMT
Mar 23, 2012, 07:21 GMT
Mar 26, 2012, 04:11 GMT
Mar 29, 2012, 01:00 GMT
Mar 31, 2012, 21:49 GMT
Apr 3, 2012, 18:38 GMT
Apr 6, 2012, 15:28 GMT
Apr 9, 2012, 12:17 GMT
Apr 12, 2012, 09:06 GMT
Apr 15, 2012, 05:55 GMT
Apr 18, 2012, 02:44 GMT
Apr 20, 2012, 23:34 GMT
Apr 23, 2012, 20:23 GMT
Apr 26, 2012, 17:12 GMT
Apr 29, 2012, 14:01 GMT
May 2, 2012, 10:50 GMT
May 5, 2012, 07:39 GMT
May 8, 2012, 04:28 GMT
May 11, 2012, 01:17 GMT
May 13, 2012, 22:06 GMT
May 16, 2012, 18:55 GMT
May 19, 2012, 15:44 GMT
May 22, 2012, 12:33 GMT
May 25, 2012, 09:22 GMT
May 28, 2012, 06:11 GMT
May 31, 2012, 03:00 GMT
Jun 2, 2012, 23:49 GMT
Jun 5, 2012, 20:38 GMT
Jun 8, 2012, 17:27 GMT
Jun 11, 2012, 14:16 GMT
Jun 14, 2012, 11:05 GMT
Jun 17, 2012, 07:53 GMT
Jun 20, 2012, 04:42 GMT
Jun 23, 2012, 01:31 GMT
Jun 25, 2012, 22:20 GMT
Jun 28, 2012, 19:09 GMT
Jul 1, 2012, 15:57 GMT
Jul 4, 2012, 12:46 GMT
Jul 7, 2012, 09:35 GMT
Jul 10, 2012, 06:23 GMT
Jul 13, 2012, 03:12 GMT
Jul 16, 2012, 00:01 GMT
Jul 18, 2012, 20:50 GMT
Jul 21, 2012, 17:38 GMT
Jul 24, 2012, 14:27 GMT
Jul 27, 2012, 11:16 GMT
Jul 30, 2012, 08:04 GMT
Aug 2, 2012, 04:53 GMT
Aug 5, 2012, 01:41 GMT
Aug 7, 2012, 22:30 GMT
Aug 10, 2012, 19:19 GMT
Aug 13, 2012, 16:07 GMT
Aug 16, 2012, 12:56 GMT
Aug 19, 2012, 09:45 GMT
Aug 22, 2012, 06:33 GMT
Aug 25, 2012, 03:22 GMT
Aug 28, 2012, 00:11 GMT
Aug 30, 2012, 20:59 GMT
Sep 2, 2012, 17:48 GMT
Sep 5, 2012, 14:36 GMT
Sep 8, 2012, 11:25 GMT
Sep 11, 2012, 08:14 GMT
Sep 14, 2012, 05:02 GMT
Sep 17, 2012, 01:51 GMT
Sep 19, 2012, 22:40 GMT
Sep 22, 2012, 19:28 GMT
Sep 25, 2012, 16:17 GMT
Sep 28, 2012, 13:06 GMT
Oct 1, 2012, 09:55 GMT
Oct 4, 2012, 06:43 GMT
Oct 7, 2012, 03:32 GMT
Oct 10, 2012, 00:21 GMT
Oct 12, 2012, 21:10 GMT
Oct 15, 2012, 17:58 GMT
Oct 18, 2012, 14:47 GMT
Oct 21, 2012, 11:36 GMT
Oct 24, 2012, 08:25 GMT
Oct 27, 2012, 05:14 GMT
Oct 30, 2012, 02:03 GMT
Nov 1, 2012, 22:51 GMT
Nov 4, 2012, 19:40 GMT
Nov 7, 2012, 16:29 GMT
Nov 10, 2012, 13:18 GMT
Nov 13, 2012, 10:07 GMT
Nov 16, 2012, 06:56 GMT
Nov 19, 2012, 03:45 GMT
Nov 22, 2012, 00:34 GMT
Nov 24, 2012, 21:23 GMT
Nov 27, 2012, 18:12 GMT
Nov 30, 2012, 15:01 GMT
Dec 3, 2012, 11:50 GMT
Dec 6, 2012, 08:40 GMT
Dec 9, 2012, 05:29 GMT
Dec 12, 2012, 02:18 GMT
Dec 14, 2012, 23:07 GMT
Dec 17, 2012, 19:56 GMT
Dec 20, 2012, 16:45 GMT
Dec 23, 2012, 13:35 GMT
Dec 26, 2012, 10:24 GMT
Dec 29, 2012, 07:13 GMT