Feature suggestion: Year-long Keogram (Keogram of Keograms?)

[zaphus]

As we approach the new year, I've been experimenting with the idea of a year-long keogram. In my experiment I take a few lines of pixels from the center of each nights keogram (horizontally) - them combine those into a slowly increasing year-long keogram
This (I hope) will give me a keogram of what the sky looks like as the year progresses

The times dont align on the keograms, since nights have different lengths - which seems fine, but an alternative would be to scale for the longest night. Seems like a lot more work, but it would show the length of the nights as well!
Since there would only be 365ish nights, choosing 3 pixels from each image would give a little over 1000 in width

Here is an example of December so far for me, using 3 pixels width per night and with time progressing to the right. Scaled down to a 250px height to be similar to the standard keograms:

I think there is potential for something interesting there, even though it will take a year to complete the image!

[zaphus]

thinking about this further, I am really taking a few pixels from the center of the original images (since I am taking the horizontal center of lots of vertical centers). Maybe theres a version where every 30 minutes (for example) you take a 3x3 (for example) from the center of the most recent image, and paste that into a giant image in the correct location (x-axis is date, y-axis is time) - then you can potentially have the full 24hrs vertically, showing midnight-midnight each day. I'm going to try this. Could also be taken from the raw unstretched image

[zaphus]

continuing to reply to myself - I've managed to build a script to do this, taking sample every 10 minutes (actually 9.5 minutes, so that I never miss one due to system delays). Here is what the last 11 days looks like, the background being black may be hiding a few misses where the system was down and unable to capture anything. It also looks good at 1 pixel rather than 3, but thats an easy modification.

[aaronwmorris]

I have been thinking about this. I am considering adding a database table to store the center pixel value of each image. Ultimately, the a year long keogram is the center line of the keogram of each day, which is just the center pixels.

I have not quite settled on a strategy yet.

[caphector]

I've wondered about creating analemmas from an all-sky camera. When I experimented with my current exposures I have waaaaaaaaaaay too much sun bloom to make the path of the analemma visible. I had a script running to snap a photo at solar noon every day and I assembled those into this: https://youtu.be/NicaNGACzhA