Celestial hemisphere:  Northern  ·  Constellation: Leo (Leo)  ·  Contains:  NGC 2903
NGC2903 - LRGB, Thomas Richter
NGC2903 - LRGB
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NGC2903 - LRGB

NGC2903 - LRGB, Thomas Richter
NGC2903 - LRGB
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NGC2903 - LRGB

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Description

Some impresssions from capturing nights:

04/10/24:
scope.JPG


05/10/24:
Because of Aurora Lights, i had to sort out some RGB data
aurora.JPG


Object description (Wikipedia.org):

NGC 2903 is an isolated barred spiral galaxy in the equatorial constellation of Leo, positioned about 1.5° due south of Lambda Leonis.It was discovered by German-born astronomer William Herschel, who cataloged it on November 16, 1784.He mistook it as a double nebula, as did subsequent observers, and it wasn't until the nineteenth century that the Third Earl of Rosse resolved into a spiral form. J. L. E. Dreyer assigned it the identifiers 2903 and 2905 in his New General Catalogue; NGC 2905 now designates a luminous knot in the northeastern spiral arm.

This field galaxy is located about 30 million light-years away from the Milky Way, and is a member of the Virgo Supercluster. The morphological classification of this galaxy is SBbc, indicating a barred spiral (SB) with moderate to tightly-wound spiral arms (bc). De Vaucouleurs and associates assigned it the class SAB(rs)bc, suggesting a weaker bar structure (SAB) with a partial ring (rs).
The bar structure appears stronger in the near infrared band. The galaxy 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 rate here is 0.7 M☉ y−1 and it is being fed by gas inflow along the bar. There is no evidence of an active nucleus.

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Revisions

    NGC2903 - LRGB, Thomas Richter
    Original
  • Final
    NGC2903 - LRGB, Thomas Richter
    B

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NGC2903 - LRGB, Thomas Richter