Gassendi, an amazing crater

[astroavani]

Gassendi, an amazing crater.
Normally, when we start astrophotography, our first target is the Moon. Our old Lua is generous because it works well even on the most modest instruments. A simple 60mm scope and a cell phone already allow for interesting photos.
But shooting the moon in high resolution requires good apertures, proper collimation and a dedicated camera, and it can be difficult work if the photo is close to the terminator.
But, in fact, it is the photos close to the terminator that reveal the good lunar photographers, as they require adequate control of light, both at the time of capture and in subsequent processing.
In this photo we have Gassendi very close to the terminator, and with the sun at an extremely low angle, the relief of the floor stands out in a dazzling way. Its rhymes are usually very evident but with the sun low we can clearly see how irregular the floor of this remarkable crater is.
Gassendi is one of the main lunar craters, with its 114 km in diameter, it is very old formed in the Nectariam period about 3.92 billion years ago.
It is an impact crater with Fractured Interior (FFC), which was modified by volcanic action after its formation, probably huge lava flows gushed through the cracks in the floor, causing numerous stress fractures to form in its interior from the reservoirs. of lava, this made it quite shallow in relation to its diameter - just 2.8 km deep.
When observed through spectroscopic analysis, the Gassendi crater has a "behavior" very different from any other lunar crater (Mikhail 1979). High-resolution studies performed in near-infrared light (Chevrel and Pinet 1990, 1992) indicated the presence of extrusive volcanic material (that is volcanic material that flows to the surface and then crystallizes) limited to the adjacent southern part of the Gassendi floor. to the floor of the Mare Humorum.
Interpretation of the data also suggested that major extrusive volcanism may have occurred in the eastern portion of the floor, as indicated by the significant presence of pyroxene, which corresponds to visible volcanic features. The western part of the crater floor, away from the geometric continuation of the western rim of Mare Humorum, is composed of rich upland material.
The difference between the west and east sides of Gassendi with intensely fractured soil could be strongly linked to the early thermal history of Mare Humorum.
I've already taken countless photos of Gassendi, but the result of this one with the sun very low really surprised me. A pleasant surprise, which shows that each photo is unique in itself and each moment is unrecoverable if we don't know how to take advantage of it.
Text and photo: Avani Soares

[Juno16]

Stunning image with beautiful details!
Well done Avani!

[Ylem]

That's awesome Avani!

It looks like you captured that from orbit!

[starfield]

Fabulous. Thanks for posting.

[Lady Fraktor]

Another beautiful image Avani!

[messier 111]

fine shot , love the infos ,thx .

[Michael131313]

Wonderful image and thanks for the info. Liked it.

[AstroBee]

Remarkable detail. Congrats.

[Greenman]

Wondeful with a good write up, thanks Avani.

[Makuser]

Hi Avani. Another fantastic lunar image from you. And Crater Gassendi near the terminator really stands out nicely. The sunken crater walls and central peaks are quite sharp in your capture. And an advantage of viewing or imaging near the terminator is that this gives more of a depth perception. Thanks for sharing your great lunar image and excellent informative text Avani and the best of wishes for many clear skies.

[Bigzmey]

Great capture and narrative, Avani!

[Gordon]

Congratulations Avani for having your image selected as todays TSS APOD!

app.php/article/2-9-2023-tss-astrophoto ... of-the-day

[AstroBee]

Congrats on the TSS APOD!

[Ylem]

Congratulations on the well deserved APOD!

But I still think you captured that image from Lunar orbit

[astroavani]

Thank you for comments!

[astroavani]

Dear colleagues!
I appreciate all the comments, I know that I don't participate much without posting some photos in which I try to perfect the information that may be interesting to everyone.
However, I am available to answer any questions you may have. If you want more detailed information about how the photo was taken, or even if you want details about processing, techniques or guidelines, feel free to ask me.
A clear sky to all!

[Unitron48]

Incredible image! Outstanding narrative. Congrats on your APOD recognition.

Dave

[scribbly]

Remarkable image, and the detail on the crater floor is astonishing. Thank you!