Solar Tangent Arc

Yesterday morning (12/13/25) here at my location in southeastern Arizona USA, I witnessed a very rare solar tangent arc.

Lunar Anomalies #11

Not really an 'anomaly', but an interesting hexagonal crater.  I've seen these before so it's no surprise, but I wonder if any human eyes have ever seen this particular one?  Regardless, it's pretty cool and very enigmatic.  Even the inside of the crater is strange looking.  This popped up as my #1 anomaly for this particular image section.  This is LRO dataset M1502014536LC.

Lunar Anomalies #10

A couple of strange-looking rock formations on LRO dataset M1502007653RC near the edge of a very large crater:

Here's some closer views:

Lunar Anomalies #9

I'd sure like to better understand these dark circular areas (holes???) right in the center of craters.  I see these quite a bit.  Here's one of the latest from LRO dataset M1502002126LC:

Lunar Anomalies #8

When I look at a histogram of the data values, I get some very strange structures.  Here are two fairly typical examples:

This is just a normal histogram -- so the x-axis (range 0:255) is the data value and the y-axis (range 0:128) is the number of pixels that have that data value.  These are 64x64 subarrays, so there are a total of 4096 pixels represented in these histograms.

These are telling me that the distribution of data values has a varying structure.

Weird.

Here are the histograms of the top 225 of a section of LRO dataset M1502001921LC:

I know, hard to see any details.  The point is to show the distribution of histograms.

Not really sure what's going on here...

Lunar Anomalies #7

LRO M1502001180LC

Lunar Anomalies #6

Interesting shape of that object at 1 o'clock:

LRO data M1501994399RC