From Project Pluto's "Guide 8"
http://www.projectpluto.com/
!Great Red Spot transit times:
9 Apr 2004 1:25
9 Apr 2004 11:21
9 Apr 2004 21:17
10 Apr 2004 7:12
10 Apr 2004 17:08
11 Apr 2004 3:03
11 Apr 2004 12:59
11 Apr 2004 22:55
12 Apr 2004 8:50
12 Apr 2004 18:46
13 Apr 2004 4:42
13 Apr 2004 14:37
14 Apr 2004 0:33
14 Apr 2004 10:29
14 Apr 2004 20:25
15 Apr 2004 6:20
15 Apr 2004 16:16