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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.....
The attached LRGB image of NGC2903 represents just under 10hours integration time. During processing I noticed some structure within the (very bright) core which I've tried to extract, to me, the core resembles blue stars.
If I put the finished result through Pixinsight's image solver, it informs me that I'd also imaged NGC2905. If I do a quick internet search on NGC2905, then it appears to be another galaxy. Since I don't believe you can have a galaxy within a galaxy, I'm confused. However, I hope you like the image
(If anyone can explain the difference between NGC2903, NGC2905 and the objects in the core of the image then it would be appreciated).
LIGHTS: L:13, R: 19, G:13, B: 13. DARKS:30; FLATS:40, BIAS:100 all at -20C.