Find Coordinates - No Luck At All

Image processing, astrometry, photometry, etc.
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Forum_2015
Posts: 358
Joined: 07 Dec 2018, 15:04

Find Coordinates - No Luck At All

Post by Forum_2015 »

Could someone download this image and give it a try?

https://drive.google.com/file/d/0B-Hpu4 ... sp=sharing

I've emailed support and Fabio said I needed to vertically Flip the image, I tried using the checkbox in Find Coordinates and also flipping the image without any luck.

I'm using a HyperStar w/ a C11, my horizontal field is approximately 76.7', set to +/- 20%, 180* maximum rotation, RA & Dec degrees left at default values.

Thanks in advance,
Nick

Forum_2015
Posts: 358
Joined: 07 Dec 2018, 15:04

Re: Find Coordinates - No Luck At All

Post by Forum_2015 »

The image can be plate solved setting Minimum Reference Stars = 4 (instead of 5). The problem is that this image is processed and many bright stars are heavily saturated, so their centroid is lost.
Another solution is to apply a very soft Gauss Filter (sigma = 0.55) so that some stars are restored.
The image is flipped too, so enable the option Vertical Flip.

Forum_2015
Posts: 358
Joined: 07 Dec 2018, 15:04

Re: Find Coordinates - No Luck At All

Post by Forum_2015 »

I am successful in 2 seconds with these settings
M51AA solve.jpg

Forum_2015
Posts: 358
Joined: 07 Dec 2018, 15:04

Re: Find Coordinates - No Luck At All

Post by Forum_2015 »

Thanks for the suggestions, I'll give it another try - before processing as well.

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