金星 ALPO-Japan Latest

Venus Image 2023/08/10(UT)

Didier Favre,Detlev Niechoy
D.Favre,D.Niechoy

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I did not think I would succeed in this image given the various parameters that make this operation difficult.
1/ the weather: for several weeks,in the northern half of France,clouds have been omnipresent and the stability of the atmosphere has put a strain on this kind of shot. Today,I had to settle for a few tens of minutes during which I "benefited" from a rather poor seeing whereas before it was completely unusable. I waited two hours for this moment just before the clouds returned.
2/ At this time,the angular position of Venus makes this observation a perilous moment. Indeed,it is necessary to take all the precautions not to be dazzled by the very close Sun and thus illuminating at the same time the background of the sky and the instrument.
3/ This year's inferior conjunction is less interesting than the first observed,for me,3 years ago (already published on spaceweather.com),at the exit of the first confinement. Indeed,at that time,due to the low angular distance of the planet from the Sun,it was hoped to highlight the atmospheric ring around Venus. An exceptional image that I had the opportunity to achieve.
Today,I offer you another image,less accomplished for the reasons mentioned above,but no less surprising. I am not unhappy with the result because it took more than 30,000 images of which only 20% were kept to be able to present it to you. Then,it was necessary to play on the luminosity levels of the planet and the sky background to hope to see the ring form. It's very subtle but it's there! I let you discover it.
Astronomically,

[Didier Favre : Bretigny-sur-Orge,France]

[Detlev Niechoy : Goettingen,Germany]

ALPO-Japan Latest Venus Section	2023/08/11
	2023/08/09