Themorphological class of NGC 5584 is SAB(rs)cd,[8] which indicates this spiral galaxy has an inner bar (SAB), an incomplete inner ring structure (rs), and loosely woundspiral arms (cd). It isflocculent in appearance with only a small nucleus.Star formation is occurring along the spiral arms.[8] Thegalactic plane is inclined at an angle of 42.4° to the line of sight from the Earth,[7] and it spans more than 50,000 light-years across.[12] 250Cepheid variables have been observed in NGC 5584.[1]
SN 1996aq (Type Ic, mag. 15.7) was discovered byMasakatsu Aoki on 17 August 1996.[13][14] It was offset by15″ west and8″ south of the galactic center. It reached magnitude 14.7 on August 18.
SN 2007af (typeIa, mag. 15.4) was discovered byKōichi Itagaki on 24 February 2007, located at an offset40″ west and22″ of the galaxy's center.[15][16][17] Alight echo of this event was observed about 1,000 days after its discovery.[18]
^Nakano, S.; et al. (August 1996). Green, D. W. E. (ed.). "Supernova 1996aq in NGC 5584".IAU Circular.6454 (1): 1.Bibcode:1996IAUC.6454....1N.
^"SN1996aq".Transient Name Server.IAU. Retrieved8 December 2024.
^Nakano, S.; Itagaki, K. (2007). "Supernova 2007af in NGC 5584".Central Bureau Electronic Telegrams.863: 1.Bibcode:2007CBET..863....1N.
^Hurst, G. M. (October 2007). "Supernova 2007af in NGC 5584".Journal of the British Astronomical Association.117 (5):280–281.Bibcode:2007JBAA..117..280H.
^"SN2007af".Transient Name Server.IAU. Retrieved8 December 2024.
^Drozdov, Dina; Leising, M. D.; Milne, P.; Riess, A. G. (June 2013). "The Detection of a Light Echo from Type Ia SN 2007af in NGC 5584".American Astronomical Society, AAS Meeting #222.222.Bibcode:2013AAS...22211804D. 118.04.
.jpg)
Media related toNGC 5584 at Wikimedia Commons