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10 minutes ago, Paul M said:

Ah! Thanks for that. The script even makes some sense!

Now that's a thing! A non-Perl speaker saying that a Perl script makes sense. Almost completely unheard of.

I do try to write readable code. The script in question is mildly embarrassing because it only tells you that you called it wrongly, not how to call it correctly. This is the first time I've made it available so I'll improve it before putting it on my web  page for others.

 

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Although this image is not of a planet, it is of a planetary satellite and I can't find anywhere more appropriate to post it. Last summer I imaged (the locations of) some satellites of Jupiter an

Despite your claim, there were hundreds of reference objects in every frame --- the stars!   Stage 1: plate-solve the subs; this puts a WCS (world co-ordinate system) in the header of each.

I'm still playing with the process of stacking on ephemeris positions! Last month I took a series of subs of M87, 30 x 120 sec with my 10" Newt and ASI178MC camera. The purpose of that exercise w

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2 minutes ago, Xilman said:

Now that's a thing! A non-Perl speaker saying that a Perl script makes sense. Almost completely unheard of.

Don't get me wrong, the instruction syntax is as clear as mud. But I can see how most of the lines function. 

MS Basic and, later BBC Basic were as advanced as I ever got with coding but I find that reverse engineering existing scripts is a good way to learn new things. 

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