NGC 4444

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]
Type	SAB(rs)bc[3]
Mass	5.8 × 109[4] M☉
Apparent dimensions (V)	2′.4 × 1′.6[5]
See also: Galaxy, List of galaxies

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. ^ ^{a b c} SIMBAD, NGC 4444 (accessed 2011 May 18)
2. ^ "Distance Results for NGC 4444". NASA/IPAC Extragalactic Database. http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4444. Retrieved 2011-05-11. 
3. ^ "NASA/IPAC Extragalactic Database", Results for NGC 4444, http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4444&img_stamp=yes&extend=no, retrieved 2011-05-11 
4. ^ ^{a b} Koribalski, B. S.; et al (July 2004). "The 1000 Brightest HIPASS Galaxies: H I Properties". The Astronomical Journal 128 (1): 16–46. arXiv:astro-ph/0404436. Bibcode 2004AJ....128...16K. doi:10.1086/421744. 
5. ^ ^{a b} 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. http://www.astr.ua.edu/keel/galaxies/classify.html. Retrieved 2011-05-20.