Re: Re : in Virgo, FSQ-85 + AP900 + STL11k

Pierre Henrotay

Hi Didier,

Possibly a side effect of alignment: you are dealing here with large pixels and small focal length (undersampling), and some field rotation as well.
Some stars fall on one or two pixels only, and this randomly from one image to the next.

Great image anyway.


--- In ap-gto@..., "didier keus" <dk31t5@...> wrote:

Hello Didier,

nice wide field image. I also noticed that some stars have a strange shape, showing two dark triangular areas pointing to their center...did you notice it in your FITS images?

yes, do not know where it comes from.
any ideas?

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