2018-03-31
Maciel Bassani Sparrengerger has imaged a bright spot on Saturn CM on March 29 at 08:16:05 UT that has later been confirmed by several observers.
http://alpo-j.asahikawa-med.ac.jp/kk18/s180329z.htm
Updated ephemeris of this feature based on images from 29 March to 22 April are given below as calculated by Marc Delcroix. Urgent observations are required at all longitudes to follow the storm evolution, and search for other possible spots.
WinJUPOS 10.3.9 (Saturn), C.M. transit times, 2018/04/22 00:32 Object longitude: L3 = 181,8° - 11,7054°/d * (T - 2018 Apr 10,5) Time interval: 2018 Mar 25,0 ... 2018 Jun 01,0 Output format: Date UT (C.M. of System 3) ------------------------------------------------------------------------------ 2018 Mar 29 08:16 ( 324°) 18:46 ( 319°) 2018 Mar 30 05:16 ( 314°) 15:46 ( 308°) 2018 Mar 31 02:17 ( 304°) 12:47 ( 299°) 23:17 ( 293°) 2018 Apr 01 09:47 ( 288°) 20:18 ( 283°) 2018 Apr 02 06:48 ( 278°) 17:18 ( 273°) 2018 Apr 03 03:48 ( 268°) 14:19 ( 263°) 2018 Apr 04 00:49 ( 258°) 11:19 ( 252°) 21:49 ( 247°) 2018 Apr 05 08:19 ( 242°) 18:50 ( 237°) 2018 Apr 06 05:20 ( 232°) 15:50 ( 227°) 2018 Apr 07 02:20 ( 221°) 12:51 ( 217°) 23:21 ( 211°) 2018 Apr 08 09:51 ( 206°) 20:21 ( 201°) 2018 Apr 09 06:52 ( 196°) 17:22 ( 191°) 2018 Apr 10 03:52 ( 186°) 14:22 ( 181°) 2018 Apr 11 00:52 ( 175°) 11:23 ( 171°) 21:53 ( 165°) 2018 Apr 12 08:23 ( 160°) 18:53 ( 155°) 2018 Apr 13 05:24 ( 150°) 15:54 ( 145°) 2018 Apr 14 02:24 ( 140°) 12:54 ( 134°) 23:24 ( 129°) 2018 Apr 15 09:55 ( 124°) 20:25 ( 119°) 2018 Apr 16 06:55 ( 114°) 17:25 ( 109°) 2018 Apr 17 03:56 ( 104°) 14:26 ( 99°) 2018 Apr 18 00:56 ( 94°) 11:26 ( 88°) 21:56 ( 83°) 2018 Apr 19 08:27 ( 78°) 18:57 ( 73°) 2018 Apr 20 05:27 ( 68°) 15:57 ( 63°) 2018 Apr 21 02:27 ( 57°) 12:58 ( 53°) 23:28 ( 48°) 2018 Apr 22 09:58 ( 42°) 20:28 ( 37°) 2018 Apr 23 06:59 ( 32°) 17:29 ( 27°) 2018 Apr 24 03:59 ( 22°) 14:29 ( 17°) 2018 Apr 25 00:59 ( 11°) 11:30 ( 7°) 22:00 ( 1°) 2018 Apr 26 08:30 ( 356°) 19:00 ( 351°) 2018 Apr 27 05:30 ( 346°) 16:01 ( 341°) 2018 Apr 28 02:31 ( 336°) 13:01 ( 331°) 23:31 ( 325°) 2018 Apr 29 10:01 ( 320°) 20:32 ( 315°) 2018 Apr 30 07:02 ( 310°) 17:32 ( 305°) 2018 May 01 04:02 ( 300°) 14:33 ( 295°) 2018 May 02 01:03 ( 290°) 11:33 ( 285°) 22:03 ( 279°) 2018 May 03 08:33 ( 274°) 19:04 ( 269°) 2018 May 04 05:34 ( 264°) 16:04 ( 259°) 2018 May 05 02:34 ( 254°) 13:04 ( 248°) 23:35 ( 244°) 2018 May 06 10:05 ( 239°) 20:35 ( 233°) 2018 May 07 07:05 ( 228°) 17:35 ( 223°) 2018 May 08 04:06 ( 218°) 14:36 ( 213°) 2018 May 09 01:06 ( 208°) 11:36 ( 202°) 22:06 ( 197°) 2018 May 10 08:37 ( 193°) 19:07 ( 187°) 2018 May 11 05:37 ( 182°) 16:07 ( 177°) 2018 May 12 02:37 ( 172°) 13:08 ( 167°) 23:38 ( 162°) 2018 May 13 10:08 ( 156°) 20:38 ( 151°) 2018 May 14 07:08 ( 146°) 17:39 ( 141°) 2018 May 15 04:09 ( 136°) 14:39 ( 131°) 2018 May 16 01:09 ( 126°) 11:39 ( 120°) 22:10 ( 116°) 2018 May 17 08:40 ( 110°) 19:10 ( 105°) 2018 May 18 05:40 ( 100°) 16:10 ( 95°) 2018 May 19 02:41 ( 90°) 13:11 ( 85°) 23:41 ( 80°) 2018 May 20 10:11 ( 74°) 20:41 ( 69°) 2018 May 21 07:11 ( 64°) 17:42 ( 59°) 2018 May 22 04:12 ( 54°) 14:42 ( 49°) 2018 May 23 01:12 ( 44°) 11:42 ( 38°) 22:13 ( 34°) 2018 May 24 08:43 ( 28°) 19:13 ( 23°) 2018 May 25 05:43 ( 18°) 16:13 ( 13°) 2018 May 26 02:44 ( 8°) 13:14 ( 3°) 23:44 ( 358°) 2018 May 27 10:14 ( 352°) 20:44 ( 347°) 2018 May 28 07:15 ( 342°) 17:45 ( 337°) 2018 May 29 04:15 ( 332°) 14:45 ( 327°) 2018 May 30 01:15 ( 322°) 11:46 ( 317°) 22:16 ( 312°) 2018 May 31 08:46 ( 306°) 19:16 ( 301°) ------------------------------------------------------------------------------