NGC2903 is an isolated Type SAB(rs)bc barred spiral 30.4 million light-years from Earth in constellation Leo and its diameter is 100,00 light-years. NGC2903’s apparent magnitude is 9.0 and was discovered by William Hershel in November 1784. Herschel and subsequent observes thought NGC2903 was a double nebula until Third Earl of Roses in the nineteenth century resolved it as a galaxy.

NGC2903 as a whole is inclined by an angle of 60° to the line of sight from the Earth. 72% of the stellar mass is located in the outer disk of the galaxy, and 20% is found in the bar. The bulge adds 5% of the stellar mass, and its star population is generally older. However, the central ~650 pc radius volume of the core is a strong starburst region. The star formation is being fed by gas inflow along the bar. There is no evidence of an active nucleus. The faint irregular dwarf galaxy UGC5806 north of image appears to be a companion, as they have an angular separation of 25′ and nearly the same radial velocity

The list below exhibits the number of subframes used with the exposure time for each filter. All the subframes were calibrated with Flats, Darks and Biases by PixInsight. Afterwards the subframes were combined and processed to the final image.

^* 2×2 binned

Total time for collecting data for this image is 12.6 hours.