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INDI Library v1.9.8 Released (29 Sep 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

Frame outline of solved image on sky map has wrong rotation

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Hi,

It seems that the frame outline that ekos paints on kstars sky map when you solve an image using astrometry has wrong rotation.

This is the fits image, flipped H and V (to match sky map) because I use a newtonian.



And this is the solved image. Note that the center is spot on, but the rotation is wrong.



WCS rotation is reported as -33.87 degrees.

Version is from git, compiled yesterday.

More tests? Any ideas?

Kind regards.
5 years 1 month ago #20161
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Link to the captured FITS file without any modifications? Longitude/Latitude of your location?
Jasem Mutlaq
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5 years 1 month ago #20164

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Here it is (attached in a tar.bz2). Note that this is not exactly the correspondig fits of the previous images (as I've shot it again), but it's very very close.

Here is my position (it's approximate, as this is a public forum, but it should be close enough to do calculations):

Lat:
40:38:30

Lon:
356:02:30
The following user(s) said Thank You: Jasem Mutlaq
5 years 1 month ago #20167
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Do you have a rotator? I do not, but this is when I noticed it start too. I mentioned something on here, but failed to follow up on it. When I loaded the first version that supported the rotator, it loaded with some weird rotated angle by default, even without a rotator device. I set it to 0, but the solver doesn't seem to reflect it correctly in kstars, as you are seeing. Everything else still works, so that is probably why it didn't bother me a lot.
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5 years 1 month ago #20169

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Thanks. So WCS rotation is different from PA by 180 degrees exactly. Maybe because WCS reads FITS from "Bottom to up"? At any rate, I fixed the issue, but need to further verify this later tonight in my observatory, especially with the rotator function.
Jasem Mutlaq
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5 years 1 month ago #20171

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I remember flipping the image of the first post in H and V in the integrated fits viewer to match the sky map, which is equivalent to a 180º rotation (IIRC) but now, taking a look at the fits file with an external viewer I just have to flip H (exchange left to right) to match the rotation of the sky map. This is weird.

Anyway, after flipping in H, I've been visually matching the two images in gimp and the difference in rotation is about 65 degrees between them.
5 years 1 month ago #20191

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No, no rotator in my case.
5 years 1 month ago #20192

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It's all fixed in GIT and I just made a video about it tonight (not published yet), so the next KStars release should have this fix.
Jasem Mutlaq
Support INDI & Ekos; Get StellarMate Astrophotography Gadget.
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5 years 1 month ago #20196

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