NGC 4444

NGC 4444
2MASS image of NGC 4444
Observation data
Constellation Centaurus
Right ascension 12h 28m 36.390s[1]
Declination −43° 15′ 42.35″[1]
Redshift 0.009677 [1]
Distance (38.8 ± 5.7 Mpc)[2]
Characteristics
Type SAB(rs)bc[3]
Mass 5.8 × 109[4] M☉
Apparent size (V) 2′.4 × 1′.6[5]

NGC 4444 is an intermediate spiral galaxy in the constellation Centaurus. The morphological classification places it midway on the continuum between a barred spiral (SB) and an unbarred spiral (SA), with an inner region that lies between a ring-like (r) and a purely spiral form (s), and medium- (b) to loosely wound (c) outer spiral arms. This makes it a hybrid ringed, barred spiral galaxy.[6] It has an angular size of 2.4 × 1.6 arcminutes[5] and the estimated mass M is given log M = 9.76, yielding 5.8 billion solar masses.[4]

References

  1. 1 2 3 SIMBAD, NGC 4444 (accessed 2011 May 18)
  2. ↑ "Distance Results for NGC 4444". NASA/IPAC Extragalactic Database. Retrieved 2011-05-11.
  3. ↑ "NASA/IPAC Extragalactic Database", Results for NGC 4444, retrieved 2011-05-11
  4. 1 2 Koribalski, B. S.; et al. (July 2004). "The 1000 Brightest HIPASS Galaxies: H I Properties". The Astronomical Journal. 128 (1): 16&ndash, 46. arXiv:astro-ph/0404436. Bibcode:2004AJ....128...16K. doi:10.1086/421744.
  5. 1 2 Skrutskie, M. F.; et al. (February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708.
  6. ↑ Keel, William C. (August 2009). "Galaxy Classification". Galaxies and the Universe. Retrieved 2011-05-20.


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