Moon image

[spendrey]

and here's one of the moon.
Any idea what the long straight shadow could be in the big crater just above and right of centre? At first I assumed it was a shadow being caused by a large prominence in the crater itself but if that is the case the shadow is going in a different direction to the rest of the shadows in the picture. Therefore I assume there must be a long ridge in the crater and that is a shadow being thrown behind it, what do you reckon?

[Ian]

That'll be the Straight Wall, also known as Rupes Recta. It's approximately 115km long and is a slope around 400m high.

An interesting exercise would be to image it in a couple of weeks time when it'll be illuminated from the other side.

Excellent photo, this feature was one of my first astrophoto targets

[spendrey]

wow that's interesting thanks Ian! I'll look out for it again as you suggest.

[Mike]

Can we have the equipment and exposure details of the image or are they secrets?  

[spendrey]

Hi Mike, I imaged this on Monday night using my 8" Skywatcher and a Toucam. It is actually just one frame from an avi file. I couldn't manage to get any better details by stacking them so I just chose the best one and played around with the contrast and brightness a bit in photo editor.

[Whitters]

Nice Image.
The straight wall is also known as the sword.
Any more?

[spendrey]

Thanks, I'm afraid I don't have anything more just yet. I still have some unprocessed avi's to get working on when I get a chance though!
Here is an enlargement of Rupes Recta, taken from the one above. It's all gone a bit pixallated unfortunately. I'm going to try what Ian suggested and take it again in a couple of weeks (weather permitting) when it's illuminated from the other side.

[Rocket Pooch]

You sod, I only saw it for the first time a couple of weeks ago.  Did you put the image on your web site?

[Rick]

There's an image of the straight wall on the gallery archive somewhere too...