Astronomy:NGC 4444
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Short description: Galaxy in the constellation Centaurus
| NGC 4444 | |
|---|---|
 DSS image of NGC 4444 | |
| Observation data (J2000 epoch) | |
| Constellation | Centaurus |
| Right ascension | 12h 28m 36.419s[1] |
| Declination | −43° 15′ 42.15″[1] |
| Redshift | 0.009771[1] |
| Helio radial velocity | 2915 km/s[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] |
| Other designations | |
| MCG-07-26-007, PGC 41043[1] | |
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
- ↑ 1.0 1.1 1.2 1.3 1.4 "NGC 4444". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+4444.
- ↑ "Distance Results for NGC 4444". NASA/IPAC Extragalactic Database. http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4444.
- ↑ "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
- ↑ 4.0 4.1 Koribalski, B. S. (July 2004). "The 1000 Brightest HIPASS Galaxies: H I Properties". The Astronomical Journal 128 (1): 16–46. doi:10.1086/421744. Bibcode: 2004AJ....128...16K.
- ↑ 5.0 5.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S.
- ↑ Keel, William C. (August 2009). "Galaxy Classification". Galaxies and the Universe. http://www.astr.ua.edu/keel/galaxies/classify.html.
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