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2022-09-20
2022-05-28
A large scale Cloud Discontinuity (CD) on Venus has been observed during the last weeks by amateur astronomers Antonio Cidadao, Luigi Morrone and Clyde Foster. This type of events represent a peculiar morphology of Venus clouds discovered recently and tracked last year over amateur observations. This time, a clear manifestation of Venus' CD was captured 5 times during May 2022 (5-10-15-20-25). The next observation of this feature is expected on 30 May and every ~5 days after it.
It will be very interesting to see when it will dissipate, so observations with IR filters are required. Imaging in UV may be useful too to confirm whether this wave phenomenon dissipates before arriving at the top of the clouds. Also, it is very important to observe every day to cover the global situation of the middle clouds.
Observations should be posted in the ALPO-Japan webpages and in the PVOL database of amateur observations (http://pvol.ehu.eus)
Javier Peralta from the Universidad de Sevilla (Spain) and Manos Kardasis (Greece) are coordinating a large effort to understand the global behavior of this feature.
Javier Peralta, jperalta1@us.es
Manos Kardasis, astromanos2002@yahoo.gr
Additional information:
2022-03-27
Important links
2021-10-16
You can see the original discoverer announcement at:
https://twitter.com/OASES_miyako/status/1449206637391007747 . You can see the video of the impact in visible light on this youtube link.
The impact occurred approximately at +20ºPg and 40º L3. This location will be possibly observed by JunoCam on the Juno mission on its PJ37 orbit later today!
If you have observations of this impact flash please report those to Ko Arimatsu, as well as R. Hueso and M. Delcroix by email to:
2021-09-14
TO ALL OBSERVERS: Check videos around 2021-09-13T22:39:30 UT to see if the video shows the flash of the impact. Additional videos will improve the study of the impacting body and will help to determine a good light-curve for this object desintegrating in Jupiter's atmosphere. Also CHECK images in CH4 band that you may have of the area after the impact and in the last Jupiter rotation .
PLEASE CONTACT US (Ricardo Hueso and Marc Delcroix) for analysis of data in case you have observed this area.
The impact detection by Jose Luis Pereira occured under bad weather conditions. Jose Luis decided to observe to look for impacts and used the software DeTeCt to check his videos. He did see something on screen while tweaking the parameters on hi first video, but thought it could be due to the very bad conditions with Jupiter even disappearing under the environment fog.
Sincere congratulations to Jose Luis Pereira for this great observation captured under difficult weather conditions! You can check a GIF extracted from the video at Marc's site: http://astrosurf.com/planetessaf/doc/2021-09-13-2239_3-IRUV-Jup_F3275-3385%20qmax.gif, or here at PVOL: http://pvol2.ehu.eus/pvolfiles/2021-09-13-2239_3-IRUV-Jup_F3275-3385 qmax.gif
2021-08-08
Observations in methane band are important in the first few days of activity. Observations in other filters will also be very helpful as the storm grows, dissipates and forms a disturbed cyclone with bright and dark structures. The short-term evolution is particularly important to understand differences and similarities with previous similar events.
2021-08-05
We encourage observers to look for possible additional detections of this plume in images of Io obtained close to 29 July and in recent observations. Volcanic plumes are better detected on the blue channel than in red light because the light observed is diffused in the tenuous material of the plume. So, color observations that do not show the plume might be checked in its blue channel.
See Jean-Luc's images and his report on Astrosurf.
2021-08-04
Solar Orbiter – closest approach ~7995 km at 04:42 UTC on 9 Aug
BepiColombo - closest approach ~550 km at 13:48 UTC on 10 Aug
Coverage of these two flybys will be through social media from ESA on Twitter: @Esaoperations @ESAsolarorbiter, @bepicolombo, @ESA_Bepi, @ESA_MTM and the first images of the flybys are expected to be released soon.
Amateur images of Venus through August to the maximum elongation of the planet are desired to maximize the return of these two flybys. You can check recent images of Venus in PVOL with noticeable cloud details on images by Luigi Morrone and Joaquín Camarena.
The figure on the right sketches the observing conditions of Venus from January 2020 to January 2022 with dates of the recent flybys by the Parker Solar Probe (11 July 2020), BepiColombo (15 October 2020) and the upcoming (9-10 August) Solar Orbiter and BepiColombo flybys. Although these flybys occur when Venus has a low elevation on the sky from most locations, Venus elongation continues to raise with maximum elongation close to 1 November 2021 favoring observers in the South hemisphere.
More information:
2021-03-11
2021-02-09
In 2021 Jupiter will be edge-on to the Sun and Earth (with equinox on May 2). This geometry will allow the observations of several mutual phenomena ("phemus" from phénomenes mutuelles in French) of the galilean moons (transits, and eclipses between the galilean moons) resulting in hundreds of events. These kind of events occur over a broad period of time of less than a year separated by 6 Earth years to the previous and next epochs of Phemus.
The IMCCE (Institut de mécanique céleste et de calcul des éphémérides) has initiated an observing campaign with predictions of the timings of the events available at
https://www.imcce.fr/recherche/campagnes-observations/phemus/phemu#. The webpage contains information about the tips for observations of the events and tools. Detailed events can inform about the details of the orbits of the satellites and gravity effects on them improving our knowledge of the Jupiter system.
Detailed ephemerides of the events are also available at: http://nsdb.imcce.fr/multisat/nsszph517he.htm.
You can also plan your observations with visualisations of the events using WinJUPOS (Tools > Ephemerides > Graphics). John H. Rogers, from the BAA indicates that some of the events listed by IMCCE are actually behind Jupiter or in its shadow and are not observable and using WinJupos in advance can be a good idea towards a successful plannification of the observation.
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