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Jupiter's NTB Plume and Turbulent wake interaction

2020-09-18

Jupiter_storm_alert According to the last Jupiter images by Clyde Foster on 16 September, plume P3 has speed up and is approaching two white spots (s1 and s2) located at a latitude further north. Interactions between plume P3 and these white spots may be imminent according to the drift of the futures.

URGENT OBSERVATIONS of this region are needed to study this interaction. Previous large-scale disturbances in the NTB resulted in the plumes being switched off by their complex turbulent interaction with the tails of other plumes.




New storm in the NTropZ-NTBs jetstream

2020-08-18

Jupiter_storm_alert Isao Miyazaki and John Rogers report on a new very bright spot in the NTropZ visible in images acquired by Isao Miyazaki on 18 August 2020. The storm is visible as a bright spot in visible wavelengths and is very bright in methane band images. This storm is the start of a new outbreak in the NTBs jetstream. Such convective storms produce NTB Disturbance in a regular cycle with the current event occurring one year ahead of the expected timeline.

Observations at all wavelengths and methane band of all longitudes of the planet are required to monitor the NTB. The outbreaks in the NTB are generally multiple with outbreaks separated in longitude tens of degree and initiated with time differences of one to a few Jupiter rotations.

The drift rate of the initial disturbance is -12.2 +/- 0.1 º/day (system III) at 22.9+/-0.5º (Pg). The plume moves at 165 m/s at 22.9º (pg) just a bit south to the NTB peak jet which in 2016-2017 had a peak velocity of 150 m/s. This means that, as predicted from observations of previous events, the convective disturbance moves faster than the zonal winds with the typical behavior of previous disturbances in the NTB.

We would like to encourage observers to observe ALL LONGITUDES in Jupiter combining visible or IR with methane band images. All previous similar disturbances produced different convective plumes in different longitudes. It is very important to catch the initial convective disturbance in its first 2 Jupiter rotations to acquire a quantitative measurement of its initial growth rate which is directly related with the enery released.

Updated ephemeris (based on tracking from 18 to 21 August) for the first plume are given below but please keep observing all other longitudes for the start of the next disturbances.

Jupiter_storm_alert ----------------------------------------------------------------------------------------------------------------------------------------
UPDATE 03 September: A second convective outbreak has appeared on Jupiter and first imaged on 01 September
by Anthony Wesley and on 02 September by Eric Sussenbach.
The new outbreak drifts similarly to the first outbreak with a drift rate of -11.6º/day and initial position as posted on the right image.
Ephemeris will be posted shortly.
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--- EPHEMERIS FOR THE FIRST OUTBREAK ---
WinJUPOS 11.1.0 (Jupiter), C.M. transit times, 2020/08/28  19:14
Object longitude: L3 = 177,3° - 12,2000°/d * (T - 2020 Aug 18,5)
Time interval: 2020 Aug 16,0 ... 2020 Sep 16,0
Output format: Date UT (C.M. of System 3)
------------------------------------------------------------------------------
2020 Aug 16   03:51 ( 206°)   13:38 ( 201°)   23:25 ( 196°)
2020 Aug 17   09:13 ( 191°)   19:00 ( 186°)
2020 Aug 18   04:47 ( 181°)   14:34 ( 176°)
2020 Aug 19   00:22 ( 171°)   10:09 ( 166°)   19:56 ( 161°)
2020 Aug 20   05:43 ( 156°)   15:31 ( 151°)
2020 Aug 21   01:18 ( 146°)   11:05 ( 141°)   20:52 ( 136°)
2020 Aug 22   06:40 ( 131°)   16:27 ( 126°)
2020 Aug 23   02:14 ( 121°)   12:02 ( 117°)   21:49 ( 111°)
2020 Aug 24   07:36 ( 106°)   17:23 ( 101°)
2020 Aug 25   03:11 (  97°)   12:58 (  92°)   22:45 (  86°)
2020 Aug 26   08:32 (  81°)   18:20 (  77°)
2020 Aug 27   04:07 (  72°)   13:54 (  66°)   23:41 (  61°)
2020 Aug 28   09:29 (  57°)   19:16 (  52°)
2020 Aug 29   05:03 (  46°)   14:51 (  42°)
2020 Aug 30   00:38 (  37°)   10:25 (  32°)   20:12 (  26°)
2020 Aug 31   06:00 (  22°)   15:47 (  17°)
2020 Sep 01   01:34 (  12°)   11:22 (   7°)   21:09 (   2°)
2020 Sep 02   06:56 ( 357°)   16:43 ( 352°)
2020 Sep 03   02:31 ( 347°)   12:18 ( 342°)   22:05 ( 337°)
2020 Sep 04   07:53 ( 332°)   17:40 ( 327°)
2020 Sep 05   03:27 ( 322°)   23:02 ( 312°)
2020 Sep 06   08:49 ( 307°)   18:36 ( 302°)
2020 Sep 07   04:24 ( 297°)   14:11 ( 292°)   23:58 ( 287°)
2020 Sep 08   09:46 ( 282°)   19:33 ( 277°)
2020 Sep 09   05:20 ( 272°)   15:08 ( 268°)
2020 Sep 10   00:55 ( 262°)   10:42 ( 257°)   20:29 ( 252°)
2020 Sep 11   06:17 ( 248°)   16:04 ( 242°)
2020 Sep 12   01:51 ( 237°)   11:39 ( 233°)   21:26 ( 227°)
2020 Sep 13   07:13 ( 222°)   17:01 ( 218°)
2020 Sep 14   02:48 ( 213°)   12:35 ( 207°)   22:23 ( 203°)
2020 Sep 15   08:10 ( 198°)   17:57 ( 193°)
------------------------------------------------------------------------------ 

Additional information can be found on the preliminary report by the BAA, and a second ellaborate report.

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UPDATE 08 September: David Hamilton from Puerto Rico has obtained a clear view of a 3rd outbreak in the NTB at L2 approximately 324. A possible previous observation by Andy Casely 2 rotations before and by Cory Schmitz will serve to constrain the first stages of this new storm. New observations of this 3rd outbreak are needed.
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Amateur support to Venus research

2020-07-03

The Parker Solar Probe (NASA) and BepiColombo (ESA) missions will flyby Venus on July 11th and October 15th. Both missions will obtain observations of Venus coordinated with the Akatsuki mission (JAXA), currently in a long eliptic orbit around the planet.

Researchers on Venus atmosphere are using this opportunity to launch a large ground-based support campaign of these missions and the participation of amateur observers can be fundamental to provide enough data of the Venus atmosphere with context observations in July, August and October.

We have launched a campaign to provide amateur support to these flybys and we are actively requesting Venus observations.

See the Venus amateur campaign at: http://pvol2.ehu.eus/bc/Venus/

All Venus observations submitted to PVOL will be used for this campaign.

Jupiter Storm in the South Temperate Belt

2020-05-31

Jupiter_storm_alert Clyde Foster from South Africa reports on the apparation of a bright storm in Jupiter in the South Temperate Belt. The storm suddenly appeared as a bright compact spot South East of Jupiter's Great Red Spot on images acquired on 31 May 2020 at around 00:34 UT. While the storm is observable in most wavelengths, it is particularly well contrasted when using filters in the methane band at 890 nm where high clouds appear bright. As other convective storms its location is in a cyclonic region. Andy Casely from Australia obtained methane maps of the area one Jupiter rotation earlier confirming the sudden apparition of the storm.

Fast observations of Jupiter are requested to follow the evolution of this storm that could grow into a larger disturbance similar to the South Temperate Belt Disturbance developed in February 2018.

The storm is located at longitude 24º (System III) and planetographic latitude -33º. Juno will observe this specific area in 2 days but ground-based images in this period can help to measure the intensity of the convection in this storm. Previous similar storms have developed with different convective cores activating very closely on different days over the first 3-4 days of activity.

Storm Activity on Saturn's North Polar Region

2020-03-31

Saturn_polar_storm_alert Andy Casely from Australia reports on the apparition of a well-defined bright spot at high latitude on Saturn at L3 224deg/+71deg first observed on 30 March 2020. This could be a revival of the system of storms observed over most of 2018, which also produced several features observed over 2019. Previous observations by Clyde Foster in South Africa and Trevor Barry in Australia allow to calculate a preliminar set of ephemeris to help with new observations of this storm.

Fast observations of Saturn are requested to investigate the dynamics of this possible storm and the general state of Saturn's polar atmosphere.

The image on the right has been edited for visualization purposes. You can see Andy's original observation on his Google photos webpage.

New impact in Jupiter

2019-08-07

GRS_Alert

An amateur astronomer: Ethan Chappel from Cibolo, Texas, US observed a bolide impact with Jupiter. The approximate time of the impact was 2019-08-07 04:07 UTC. Ethan captured his video on the red channel with a C8, Chroma Red filter and ASI 290MM. The image on the right was produced by the DeTecT software that uses differential photometry images of a video to look for possible impacts in the planet.

Congratulations to Ethan on this discovery.

Observers from the American continent observing the planet at the same time may have got also a video observation of the same impact. If anyone has a second detection it would help to constrain the size and mass of the object, specially if the second detection was made with a different filter. The flash seems too small at present to have caused an impact scar. The flash was recorded at approximate coordinates: 10.0º (System III) and -19.0 (Pg). This is about 60 deg west of Jupiter's GRS. A search on images acquired over the next minutes/hours of the same region might be worthy. An impact scar is unlikely though.

Jupiter's GRS Alert

2019-05-22

GRS_Alert Observations over the last couple of years have shown discrete events of red material flowing apart from the GRS. This activity has increased over 2019 and recent observations obtained by several amateurs including notable images by A. Wesley and C. Foster show "flakes" outside of the GRS and a distorted shape.

Observations on May 22 show a very distorted GRS in blue and methane band filters that indicate an intensification of this recent activity. The images on the right were obtained by Anthony Wesley.

Observations are requested to monitor this activity. Red, Blue and methane band filters are required to investigate the nature of the behavior of the GRS. Frequent observations are needed as the activity is evolving on a daily basis. Ephemeris of the GRS transits on the Central Meridian of the planet can be found here

Jovian impacts detection software updated

2019-05-14

Marc Delcroix has released a new version of the DeTeCt software to find look for impacts in video observations of Jupiter and Saturn. The new software can be downloaded from its github page or from the jovian impacts section in PVOL.

Uranus bright feature

2018-10-28

Recent observations by Blake Estes acquired on 22 October 2018 using the 60'' Mount Wilson telescope show a bright cloud feature at the border of the bright polar hood. This storm has now been observed by other amateur astronomers and is visible in some observations obtained with large telescopes.

Marc Delcroix has studied the amateur images and has provided the ephemeris bellow. Note that this is the first storm observed in Uranus by amateurs since 2014 and that the professional community would highly wellcome new observations of this feature. Observations with non narrow IR filters like the 610, 685 and 742 nm are recommended.
WinJUPOS 10.3.11 (Uranus), C.M. transit times, 2018/11/14  10:06
Object longitude: L = 270,0° - 24,7470°/d * (T - 2018 Oct 09,5)
Output format: Date UT (C.M. of System 1)
------------------------------------------------------------------------------
2018 Nov 01   12:48 (  60°)
2018 Nov 02   05:14 (  43°)   21:39 (  26°)
2018 Nov 03   14:05 (   9°)
2018 Nov 04   06:31 ( 352°)   22:57 ( 335°)
2018 Nov 05   15:22 ( 318°)
2018 Nov 06   07:48 ( 301°)
2018 Nov 07   00:14 ( 285°)   16:40 ( 268°)
2018 Nov 08   09:05 ( 250°)
2018 Nov 09   01:31 ( 234°)   17:57 ( 217°)
2018 Nov 10   10:23 ( 200°)
2018 Nov 11   19:14 ( 166°)
2018 Nov 12   11:40 ( 149°)
2018 Nov 13   04:06 ( 132°)   20:32 ( 115°)
2018 Nov 14   12:57 (  98°)
2018 Nov 15   05:23 (  81°)   21:49 (  64°)
2018 Nov 16   14:15 (  47°)
2018 Nov 17   23:06 (  13°)
2018 Nov 18   15:32 ( 356°)
2018 Nov 19   07:58 ( 340°)
2018 Nov 20   00:24 ( 323°)   16:49 ( 306°)
2018 Nov 21   09:15 ( 289°)
2018 Nov 22   01:41 ( 272°)   18:07 ( 255°)
2018 Nov 23   10:33 ( 238°)
2018 Nov 24   02:58 ( 221°)   19:24 ( 204°)
2018 Nov 25   11:50 ( 187°)
2018 Nov 26   04:16 ( 170°)
2018 Nov 27   13:07 ( 136°)
2018 Nov 28   05:33 ( 119°)   21:59 ( 102°)
2018 Nov 29   14:25 (  86°)
2018 Nov 30   06:50 (  68°)   23:16 (  51°)
2018 Dec 01   15:42 (  35°)
2018 Dec 02   08:08 (  18°)
2018 Dec 03   00:34 (   1°)   16:59 ( 344°)
2018 Dec 04   09:25 ( 327°)
2018 Dec 05   01:51 ( 310°)   18:17 ( 293°)
2018 Dec 06   10:43 ( 276°)
2018 Dec 07   03:08 ( 259°)   19:34 ( 242°)
2018 Dec 08   12:00 ( 225°)
2018 Dec 09   04:26 ( 208°)   20:52 ( 191°)
2018 Dec 10   13:17 ( 174°)
2018 Dec 11   05:43 ( 157°)   22:09 ( 140°)
2018 Dec 12   14:35 ( 124°)
2018 Dec 13   07:01 ( 107°)
2018 Dec 14   15:52 (  73°)
2018 Dec 15   08:18 (  56°)
2018 Dec 16   00:44 (  39°)   17:10 (  22°)
2018 Dec 17   09:36 (   5°)
2018 Dec 18   02:01 ( 348°)   18:27 ( 331°)
2018 Dec 19   10:53 ( 314°)
2018 Dec 20   03:19 ( 297°)   19:45 ( 280°)
2018 Dec 21   12:10 ( 263°)
2018 Dec 22   04:36 ( 246°)   21:02 ( 229°)
2018 Dec 23   13:28 ( 213°)
2018 Dec 24   05:54 ( 196°)   22:19 ( 178°)
2018 Dec 25   14:45 ( 162°)
2018 Dec 26   07:11 ( 145°)   23:37 ( 128°)
2018 Dec 27   16:03 ( 111°)
2018 Dec 29   00:54 (  77°)   17:20 (  60°)
2018 Dec 30   09:46 (  43°)
2018 Dec 31   02:12 (  26°)   18:38 (   9°)
2019 Jan 01   11:03 ( 352°)
2019 Jan 02   03:29 ( 335°)   19:55 ( 318°)
2019 Jan 03   12:21 ( 301°)
2019 Jan 04   04:47 ( 285°)
2019 Jan 05   13:38 ( 250°)
2019 Jan 06   06:04 ( 234°)   22:30 ( 217°)
2019 Jan 07   14:56 ( 200°)
2019 Jan 08   07:22 ( 183°)   23:47 ( 166°)
2019 Jan 09   16:13 ( 149°)
2019 Jan 10   08:39 ( 132°)
2019 Jan 11   01:05 ( 115°)   17:31 (  98°)
2019 Jan 12   09:56 (  81°)
2019 Jan 13   02:22 (  64°)   18:48 (  47°)
2019 Jan 14   11:14 (  30°)
2019 Jan 15   03:40 (  13°)
2019 Jan 16   12:31 ( 339°)
2019 Jan 17   04:57 ( 323°)   21:23 ( 306°)
2019 Jan 18   13:49 ( 289°)
2019 Jan 19   06:15 ( 272°)   22:40 ( 255°)
2019 Jan 20   15:06 ( 238°)
2019 Jan 21   07:32 ( 221°)   23:58 ( 204°)
2019 Jan 22   16:24 ( 187°)
2019 Jan 23   08:49 ( 170°)
2019 Jan 24   01:15 ( 153°)   17:41 ( 136°)
2019 Jan 25   10:07 ( 119°)
2019 Jan 26   02:33 ( 102°)
2019 Jan 27   11:24 (  68°)
2019 Jan 28   03:50 (  51°)   20:16 (  35°)
2019 Jan 29   12:42 (  18°)
2019 Jan 30   05:08 (   1°)   21:33 ( 344°)
2019 Jan 31   13:59 ( 327°)
------------------------------------------------------------------------------
Links:

Mars global storm

2018-06-08

Mars storm Mars is getting closer to its opposition in July just at the right time in its dusty season. After several detections of regional dust storms in the planet a global storm in Mars is on its development stage. Images by J. Rueck, D. Milika and P. Nicholas and D. Peach among other observers show the onset of this new large-scale storm. Orbiters around Mars are following the extension and growth of the current storm. A report from the MARCI instrument on the MRO mission is available here.

The image on the right compiled by Agustin Sanchez Lavega shows a comparison of amateur observations with data from the MARCI instrument on Mars Recoinnassance Orbiter.

We encourage all observers to image this Mars dust storm. The five most recent planetary storms detected in Mars occurred in 1977, 1982, 1994, 2001 and 2007. Typical global storms on Mars can develop and lasts over time-scales of a month or longer.

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