NGC 45

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NGC 45
NGC 45
NGC 45 by GALEX (ultraviolet)
Observation data (2000.0 epoch)
Constellation Cetus
Right ascension 00h 14m 3.99s
Declination −23° 10′ 55.5″
Redshift 0.001558[1]
Helio radial velocity 467 km/s[1]
Distance 32.6 ± 10 Mly
(10 ± 3.1 Mpc)[2]
Apparent magnitude (V) 10.4
Characteristics
Type SA(s)dm[1]
Apparent size (V) 7.41′ × 5.13'
Other designations
UGC 4, MCG 04-01-21, PGC 930
See also: Galaxy, List of galaxies

NGC 45 is a low surface brightness spiral galaxy[3] in the constellation of Cetus. It was discovered on 11 November 1835 by the English astronomer John Herschel. In the sky, it is located near the magnitude 6.8 star HD 941.

NGC 45 has no clear defined spiral arms like the Milky Way galaxy. Unlike the Milky Way, the center bar nucleus is also very small and distorted. NGC 45 thus does not have a galactic habitable zone like the Milky Way.[4][5] [6] For the Milky Way, the galactic habitable zone is commonly believed to be an annulus with an outer radius of about 10 kiloparsecs and an inner radius close to the Galactic Center, both of which lack hard boundaries.[5]







Gallery[edit]

References[edit]

  1. ^ a b c NASA NED, "NGC 0045" (accessed 20 April 2010)
  2. ^ "Distance Results for NGC 0045". NASA/IPAC Extragalactic Database. Retrieved 2010-05-04. 
  3. ^ http://simbak.cfa.harvard.edu/simbad/sim-id?Ident=ngc+45
  4. ^ Caltech, II. MORPHOLOGY, #34
  5. ^ a b Gowanlock, M. G.; Patton, D. R.; McConnell, S. M. (2011). "A Model of Habitability Within the Milky Way Galaxy". Astrobiology. 11 (9): 855–873. arXiv:1107.1286Freely accessible. Bibcode:2011AsBio..11..855G. doi:10.1089/ast.2010.0555. PMID 22059554. 
  6. ^ Choi, Charles Q. (21 August 2015). "Giant Galaxies May Be Better Cradles for Habitable Planets". Space.com. Retrieved 24 August 2015. 

External links[edit]

Coordinates: Sky map 00h 14m 3.99s, −23° 10′ 55.5″