NGC 2903
NGC 2903 is a remote barred spiral galaxy in the equatorial constellation of Leo, located about 1.5° due south of Lambda Leonis. It used to be located via 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 till the nineteenth century that the Third Earl of Rosse resolved into a spiral form.[5] 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 subject galaxy[12] is positioned about 30[3] million light-years away from the Milky Way, and is a member of the Virgo Supercluster.[4] The morphological classification of this galaxy is SBbc, indicating a barred spiral (SB) with average to tightly-wound spiral fingers (bc). De Vaucouleurs and mates assigned it the category SAB(rs)bc, suggesting a weaker bar shape (SAB) with a partial ring (rs). The bar shape seems more advantageous in the close to infrared band. The galaxy as a complete is inclined with the aid of an perspective of 60° to the line of sight from the Earth.[7]
72% of the stellar mass is positioned in the outer disk of the galaxy, and 20% is observed in the bar. The bulge provides 5% of the stellar mass, and its megastar populace is commonly older.[13] However, the central ~650 computer radius quantity of the core is a sturdy starburst region. The celebrity formation fee right here is 0.7 M☉ y−1 and it is being fed by way of fuel influx alongside the bar. There is no proof of an energetic nucleus.
The irregular dwarf galaxy KKH fifty one seems to be a companion, as they have an angular separation of 25′ and almost the equal radial velocity.
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