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NGC3503 in the Constellation Carina - Mar/Apr 2023


NGC 3503 is a Reflection Nebula in the Carina constellation which is situated south of the celestial equator and is visible from the southern hemisphere.

This nebulosity was very faint and needed considerably more exposure time than I usually spend on an image to reveal any structure with an acceptable amount of SNR and so this image was exposed across many nights from my Bortle 4 backyard sky for a total of 33 hours and 38 minutes... even with such a long amount of exposure time, this nebula signal is so weak that the data SNR is still lower than on brighter objects, resulting in more a more grainy image.
Exposed through three 7nm narrowband filters and combined in "Hubble palette" style, Sulfur II as red, Hydrogen Alpha as green and Oxygen III as blue.
Exposed through a C8 SCT at f6.3 with a QHY268M astronomy camera and tracked with a hypertuned CGEM mount.


© Mariusz Goralski

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