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I was out with my scope for the first time this years and was imaging the galaxy NGC2903 in LRGB. When I was stacking the RGB images, I noticed that one of the stars didn't properly align, and can now see that it is a very slowly moving object.
I am not sure how I can identify what object it is?
I can't find anything in Stellarium that shows up in that period, so anyone of you that can help? Loosely comparing it to other stars, it appears to be like +14 magnitude ⭐
It was imaged from around CET 01:43 to 02:28 in this GIF:
It probably also appeared in the light frames that I took previously to this, but I haven't been able to check that yet - Any inputs would be very welcome and interesting! 😁
(If there is a better forum for this kinda post, please let me know too).
Celestron AVX Mount
Baader RGB Filters
I took Olly @ollypenrice seriously when he claimed that 6" refractors are great galaxy hunters, so I let my EdgheHD scopes rest in the cupboard and put the Esprit 150 at work. These images summarizes the few clear night I had in February and March. RGB was collected with ASI071 (OSC) in most cases supplemented with additional lum from ASI 1600 MM (sometimes sitting on the Esprit 100).
Top left: NGC2903
Top middle: NGC4712, 4725, 4747
Top right: NGC3718 and 3729
Bottom: M96 and M96
Yes, I have already posted the images separately, so excuse the spamming but I thought it was nice to see them together. It also gives an idea of their relative sizes as all imgaes are on the same scale.
Comments welcome, including if I should put the 11" EdgeHD on the mount instead.....
I recently had my first light with my new Mesu mount and aimed the Esprit 150 at NGC2903. Combined with the he ASI 071MC with its APS-C sized chip this gave me a rather large FOV and therefore a rather small galaxy.
I kind of like the small galaxy in a large space, but still I started playing with ways to crop the image, realizing that there are indeed many different ways to do this.
I first made a rather standard crop keeping approximately the same image dimensions and the galaxy in the centre:
Then it struck me that it could look nice in a more panoramic view:
And finally, I started to think about the possibility to use the famous Golden Ratio (https://en.wikipedia.org/wiki/Golden_ratio) used by artists since Leonardo da Vinci. I first tried it in its simplest form by just placing the galaxy in the one-dimensional golden ratio position along the length of the image:
But this could also be done in two dimensions using the Fibonacci spiral, and to get it there I felt it benifited from a 180° rotation of the image:
Any more suggestions? What looks best, if any? Feel free to play with different ways to crop my image.