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2020-10-13
The ESA/JAXA mission BepiColombo will flyby Venus on 15 October at an altitude of 10,720 km above Venus surface. It will observe the planet from 13 October to 17 October with a closest approach on 15 October at 03:58 UT. This will be the first of two flybys to Venus, with the second one scheduled for 10 August 2021 at a very close altitude of 550 km. We would like to invite you to get Venus observations over these days and up to October 21 with emphasis on the closest approach of 15 October. Venus cloud tops observable in the UV rotate around the planet once every 4 days and observations from 11-12 October will characterize the details observable at the time of the closest flyby on 15 October. Observations on 19-20 will be able to characterize the next rotation. Long infrared filters (IR810, methane filters and 1000nm) can be used to study the dynamics of lower levels of the clouds where the atmosphere rotates once every 5 days and where large structures recently discovered and not yet fully understood can be observed (see for instance the following
observations from Manos Kardasis from March 2020.)
We warmly invite you to get observations that will help us characterize motions, cloud morphology and changes in Venus cloud fields over the time scale of 2-3 rotations around the planet (8-13 days). Some of you have obtained fantastic observations of Venus surface with combinations of filters close to 1 micron isolating the narrow bands at 1.0, 1.05 and 1.1 microns where the surface becomes observable. Such observations are also highly welcomed.
BepiColombo will observe Venus thermal emissions from 7 to 14 microns obtaining global images of the temperatures at the cloud tops and above the clouds and will obtain detailed spectroscopy in the UV from 145 to 315 nm. Images in the UV and 10 microns (also reflecting thermal properties of the atmosphere at the upper clouds and above) will be obtained by the Akatsuki orbiter. The amateur contribution might provide most of the temporal context of the cloud fields to the BepiColombo spectra and will be very valuable to the mission.
More information:
2020-09-18
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.
2020-08-18
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.
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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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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.
2020-05-31
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.
2020-03-31
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.
2019-08-07
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.
2019-05-22
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
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.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.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:
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