Jupiter in January grows from 39 to 42 arcseconds wide. Any telescope will show its four big Galilean moons. Binoculars almost always show at least two or three.
Below are the times, in Universal Time, when Jupiter’s Great Red Spot should rotate across the planet’s central meridian. The dates, also in UT, are in bold.
December 16, 0:47, 10:42, 20:38; 17, 6:34, 16:29; 18, 2:25, 12:21, 22:16; 19, 8:12, 18:08; 20, 4:03, 13:59, 23:55; 21, 9:50, 19:46; 22, 5:42, 15:37; 23, 1:33, 11:29, 21:24; 24, 7:20, 17:16; 25, 3:11, 13:07, 23:03; 26, 8:58, 18:54; 27, 4:49, 14:45; 28, 0:41, 10:36, 20:32; 29, 6:28, 16:23; 30, 2:19, 12:15, 22:10; 31, 8:06, 18:02.
January 1, 3:57, 13:53, 23:48; 2, 9:44, 19:40; 3, 5:35, 15:31; 4, 1:27, 11:22, 21:18; 5, 7:14, 17:09; 6,…