M 1 Crab Nebula expansion animation (2021/2023) - Forums

Topic starter

Feb 15, 2023

Hi,

i just finished my second image of M 1 almost exactly 2 years after the first one and did a parallel processing of the data to obtain final images that are as identical as possible. Question was: "Can I see any change in the supernova remnant after 2 years?"

Here is the GIF animation of the result:

M1 animation (2021/2023)

In 2 years, I will add a 3rd frame to the GIF!

CS, Bernd

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Rob Johnson

Feb 15, 2023

Great project Bernd and yes you can definitely see the expansion in your gif, well done! You must have kept to a very strict workflow to keep the images so ‘identical’.
cs, Rob

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Oscar

Feb 15, 2023 · Edited: Feb 15, 2023

I had no idea they expand in size this fast.

andrea tasselli

Frequent contributor

Feb 15, 2023

This is what 15 years of expansion look like:

https://www.astrobin.com/cfse3j/

Biggest surprise is the runaway star to the upper left. Got to check on that one...

Oscar

Feb 16, 2023

@andrea tasselli
Why is that top left star moving so fast? Only 15 years?

Bernd Limburg

Topic starter

Feb 16, 2023 · Edited: Feb 16, 2023

@andrea tasselli
Why is that top left star moving so fast? Only 15 years?

That star is G 100-20, a 12th mag star which has an apparent motion of 0.25"/yr (source). So in 15 years it moves almost 4 arcseconds.

The direction is south, so "downward" in my image (which is north-aligned). In the 2 years between my images it moved 0.5" down, and I think even in my animation this is (barely) visible, if you know it and "want to see it"

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