10 replies to this topic

[stanislas-jean]

Here is a report of Venus performed last 15th feb. under average good images.
The main topic is the bright spot collected with the red filter, very clear and conspicious.
This presence is motivating its survey in order to see its duration and origin,
if coming from ground or only atmospheric (so drifting in the atmosphere).
Rotation period of atmosphere stands between 4days a round,
may be 2.5days at the occurrence latitude into the atmosphere.

It was expected on the next 18th, 19th and 20th, but nothing was.

If any observer collected something on that period, before, from the 11th and after, until the 19-20th, this is welcome on the forum.

Thanks for reading.

Taking into account my own data, its living time was short, very short.

Faithfully.

Stanislas-Jean

 

 

 

 

 

 

 

[niteskystargazer]

 Stanislas-Jean,

 

Very nice sketches of Bright spot on Venus (Last 15th February)  .

 

CS.KLU,

 

,

Tom

[Uwe Pilz]

Very interesting, thank you.

[stanislas-jean]

Many thanks Uwe and Tom for your works, gents for their likes.

This event, that I observed also during the last 82-83 with a lot with such occurrences, may come from volcanism.

However the cloud/ chimney created by such activity is involving a bright cloud/ spot that drift in the atmosphere.

Here very few data for assessment.

However I noted on the jpn alpo website 2 obervers reporting the same on the same date and time period, Yuri Goryashko and joachin Camarera, but in UV; personnally on red light W29 (Nothing in blue and yellow green lights).

Acquisition times stands at 13H40 (UV), 15H39 5UV) and me 18H00UT (R W29).

See the website for data: http://alpo-j.sakura.ne.jp/indexE.htm

for the 15th february date. Some other obervers were on, but didn't show Something conspisciously.

A conclusion may be settled suggesting a very short duration event.

Stanislas-Jean

[stanislas-jean]

Some additionnal views of venus performed last 25,26 and 27th feb.

Nothing special about.

However a picture of Paulo Casquinha is showing a such spot in deep blue-uv segment near the equator on the last 23th.

See the jpn alpo site for details.

Spot on CM100° (UV) and 20° north around.

Stanislas-Jean

 

 

 

[niteskystargazer]

 Stanislas-Jean,

 

Nice sketches  .

 

CS,KLU,

 

 

 

Tom

[frank5817]

Stanislas-Jean,

 

Always good to see your sketches here.

 

Frank

[stanislas-jean]

Many thanks to Tom and Frank for your kind words, also gents for their likes.

However, when watching pictures of the named ccd observers, it could be possible also to catch such visually, sure on the last 15th feb. with a simple 102mm aperture achromatic, surely with a 150mm still visually on the 23th last providing the fact that the sky conditions stand on normal status, this was not possible on the period.

Here we met Always cloudy skies and strong windy levels, mostly 35mph speed and more since last october last year.

Quite unusual on the season and new occurrence now.

So that I reassess all my OTA to be 6" max apertures for telluric planets, the 10" is stored for any unprobable occurrence, at present.

Be good and have good WE.

Stanislas-Jean

[stanislas-jean]

Hi,

The reports of the 1st and 2nd of march: Nothing to declare!

If a spot activity is there yet, data must have to go deeper in resolution.

With regards to the local weather conditions, impossible to use big guns over 6".

However, the quadrature of the planet is approching, sothat an AL study could start again (if any AL activity).

Suggestion.

Good skies.

Stanislas-Jean

 

 

[niteskystargazer]

 Stanislas-Jean,

 

Nice sketches  ,

 

CS,KLU,

 

,

 

Tom

[stanislas-jean]

Thanks Tom.

S-J