Neptune: new ephemeris for 2015 spotA  : 2015/08/26  by Marc Delcroix
　Thanks to the latest observations made these last 2 weeks, I could confirm that the spot we observe accelerated its drift. I now estimate it around 26°/Julian Day, and measured the latitude around -42°.

The new ephemeris (I call it now spotA2 to identify the shift in drift) is made with the 7 best fitted observations and surprisingly an observation I made which was perfectly aligned with the previous drift on Aug. 3rd, hint maybe that the spot started changing it's speed just after that date.

Here are the new ephemeris for your convenience:

WinJUPOS 10.2.0 (Neptune), C.M. transit times, 2015/08/25 17:50
Object longitude: L = 273,8° + 25,9898°/d * (T - 2015 Aug 16,5)
Time interval: 2015 Aug 03,0 ... 2015 Oct 01,0
Output format: Date UT (C.M. of System 1)
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2015 Aug 03 04:28 ( 288°) 21:24 ( 306°)
2015 Aug 04 14:20 ( 324°)
2015 Aug 05 07:16 ( 343°)
2015 Aug 06 00:11 ( 1°) 17:07 ( 19°)
2015 Aug 07 10:03 ( 38°)
2015 Aug 08 02:59 ( 56°) 19:54 ( 74°)
2015 Aug 09 12:50 ( 93°)
2015 Aug 10 05:46 ( 111°) 22:42 ( 130°)
2015 Aug 11 15:37 ( 148°)
2015 Aug 12 08:33 ( 166°)
2015 Aug 13 01:29 ( 185°) 18:24 ( 203°)
2015 Aug 14 11:20 ( 221°)
2015 Aug 15 04:16 ( 239°) 21:12 ( 258°)
2015 Aug 16 14:07 ( 276°)
2015 Aug 17 07:03 ( 294°) 23:59 ( 313°)
2015 Aug 18 16:55 ( 331°)
2015 Aug 19 09:50 ( 349°)
2015 Aug 20 02:46 ( 8°) 19:42 ( 26°)
2015 Aug 21 12:38 ( 45°)
2015 Aug 22 05:33 ( 63°) 22:29 ( 81°)
2015 Aug 23 15:25 ( 99°)
2015 Aug 24 08:21 ( 118°)
2015 Aug 25 01:16 ( 136°) 18:12 ( 154°)
2015 Aug 26 11:08 ( 173°)
2015 Aug 27 04:04 ( 191°) 20:59 ( 209°)
2015 Aug 28 13:55 ( 228°)
2015 Aug 29 06:51 ( 246°) 23:47 ( 265°)
2015 Aug 30 16:43 ( 283°)
2015 Aug 31 09:38 ( 301°)
2015 Sep 01 02:34 ( 319°) 19:30 ( 338°)
2015 Sep 02 12:26 ( 356°)
2015 Sep 03 05:21 ( 14°) 22:17 ( 33°)
2015 Sep 04 15:13 ( 51°)
2015 Sep 05 08:09 ( 70°)
2015 Sep 06 01:04 ( 88°) 18:00 ( 106°)
2015 Sep 07 10:56 ( 124°)
2015 Sep 08 03:52 ( 143°) 20:48 ( 161°)
2015 Sep 09 13:43 ( 179°)
2015 Sep 10 06:39 ( 198°) 23:35 ( 216°)
2015 Sep 11 16:31 ( 235°)
2015 Sep 12 09:27 ( 253°)
2015 Sep 13 02:22 ( 271°) 19:18 ( 289°)
2015 Sep 14 12:14 ( 308°)
2015 Sep 15 05:10 ( 326°) 22:05 ( 344°)
2015 Sep 16 15:01 ( 3°)
2015 Sep 17 07:57 ( 21°)
2015 Sep 18 00:53 ( 39°) 17:49 ( 58°)
2015 Sep 19 10:44 ( 76°)
2015 Sep 20 03:40 ( 94°) 20:36 ( 113°)
2015 Sep 21 13:32 ( 131°)
2015 Sep 22 06:28 ( 150°) 23:24 ( 168°)
2015 Sep 23 16:19 ( 186°)
2015 Sep 24 09:15 ( 204°)
2015 Sep 25 02:11 ( 223°) 19:07 ( 241°)
2015 Sep 26 12:03 ( 260°)
2015 Sep 27 04:58 ( 278°) 21:54 ( 296°)
2015 Sep 28 14:50 ( 314°)
2015 Sep 29 07:46 ( 333°)
2015 Sep 30 00:42 ( 351°) 17:38 ( 10°)
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Thanks to all of the Neptune observers, please keep up the good work and sharing your observations! 

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