Go Back   IceInSpace > Images > Solar System

Reply
 
Thread Tools Rate Thread
  #1  
Old 29-07-2021, 10:20 AM
mental4astro's Avatar
mental4astro (Alexander)
kids+wife+scopes=happyman

mental4astro is offline
 
Join Date: Jun 2008
Location: sydney, australia
Posts: 4,939
Holy double doughnuts, Batman! A pair of concentric craters.

This time I’m going from trios to duos.

One of the more unique and rare features of volcanic origin are concentric craters. These are essentially impact craters that had some magma intrusion push up but not penetrate the crater floor and flood the crater. Interestingly all of these concentric craters all exist along the edge of Mare, and also they hadn’t been obliterated by the Great Bombardment.

There would appear to be an upper and lower limit to the size of these. The largest concentric crater is only 30km, but most are between 6 to 15km, with a few smaller and a few larger.

Hesiodus A is one of the easiest to find & one of the largest, and Marth is just a little west of it.

The pic was done using a 9” Santel Mak with a 224 colour camera. Seeing conditions were not good on the night. Still working on my processing skills. Processed using Autostakkert and Registax6, and touched up using PhotoDirector.

Thanks for looking,
Alex.

EDIT: I had it wrong the origin of these structures. I did a bit more reading. See here:

http://www.psrd.hawaii.edu/Aug16/Lun...c-craters.html

You will find a list of these concentric craters here:

http://www.psrd.hawaii.edu/Aug16/Lun...c-craters.html
Attached Thumbnails
Click for full-size image (Concentric 3 - Copy-1 A - Copy - Copy.jpg)
182.6 KB58 views

Last edited by mental4astro; 29-07-2021 at 12:25 PM.
Reply With Quote
  #2  
Old 29-07-2021, 01:34 PM
Retrograde's Avatar
Retrograde (Pete)
a.k.a. @AstroscapePete

Retrograde is offline
 
Join Date: Oct 2011
Location: Sydney
Posts: 1,387
Looking good there Alex. Good info too.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 09:51 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Testar
Advertisement
Limpet Controller
Advertisement
NexDome Observatories
Advertisement
Astronomy and Electronics Centre
Advertisement