NGC 2903 is a spiral barred galaxy in Leo constellation.
With dimensions 12.6'x5.5' and magnitude 9.7, it is one of the most remarkable galaxies in the nothern emisphere.
It is located 24 millions light years away and its real diameter is 88000 light years, so a bit smaller than Milky Way.
Large amount of dusts dominate the inner regions and the spiral arms which begin there.
On the lower side of the image its is visible the faint galaxy UGC 5086, which is believed to be a companion of NGC 2903.
(text adapted from "The Cambridge Photographic Atlas of Galaxies")
Optic GSO RC12 Truss - Aperture 304mm, focal lenght 2432mm, f/8
Mount 10Micron GM2000 HPSII
Camera ZWO ASI 2600 MM Pro with filter wheel 7 positions
Filters Astrodon Gen2 E-Serie Tru-Balance 50mm unmounted LRGB
Guiding system ZWO OAG-L with guide camera ASI 174MM
Exposure details L 45x300" bin3 -15C
R 16x300" bin3 -15C
G 16x300" bin3 -15C
B 16x300" bin3 -15C
Total integration 7h45'
Acquisition Voyager, PHD2
Processing Pixinsight 1.8, Photoshop CS5, StarXTerminator, NoiseXTerminator, BlurXTerminator
Location Promiod (Aosta Valley, Italy), own remote observatory
Date 17/20 February 2023