NGC 578

Source: Wikipedia, the free encyclopedia.
59.3 ± 15.7 Mly (18.2 ± 4.8 Mpc)[2]
Apparent magnitude (V)10.8[3]
Characteristics
TypeSAB(rs)c [2]
Apparent size (V)4.9′ × 3.1′[2]
Other designations
UGCA 18, ESO 476- G 015, AM 0128-225, MCG -04-04-020, IRAS 01280-2255, PGC 5619

NGC 578 is a

light years away from Earth, which means, given its apparent dimensions, that NGC 578 is approximately 110,000 light years across.[2] It was discovered by John Herschel on November 11, 1835.[4]

NGC 578 is a spiral galaxy with three arms. The bulge is small and slightly elliptical and has a prominent bar running at an east–west axis. From each end of the bar emerges a spiral arm with a very steep angle. After half a revolution the southeastern arm bifurcates while the northwest becomes diffuse.[5] The third arm features more

HII regions than the other arms and is more prominent at its outer portion.[6] An unusual aspect of the galaxy is that the spiral arms appear to end at the corotation circle.[7] A bright galaxy is visible superimposed to the east of the galaxy.[5]

NGC 578 is the foremost galaxy in the NGC 578 group, which also includes galaxies 2MASX J01301192-2245448 and MBG 01272-2057.[8]

References

  1. ^ "NGC 578". www.noirlab.edu. Retrieved 1 February 2025.
  2. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 578. Retrieved 1 February 2025.
  3. ^ "Revised NGC Data for NGC 578". spider.seds.org. Retrieved 30 March 2024.
  4. ^ Seligman, Courtney. "NGC 578 (= PGC 5619)". Celestial Atlas. Retrieved 19 November 2018.
  5. ^
    doi:10.1086/342340
    .
  6. ^ Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  7. doi:10.1088/0004-637X/694/1/512
    .
  8. S2CID 119194025
    . Retrieved 1 February 2025.
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