NGC 5584 | |
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Observation data ( J2000 epoch) | |
Constellation | Virgo |
Right ascension | 14h 22m 3.811s [2] |
Declination | −00° 23′ 14.82″ [2] |
Redshift | 0.005525 [3] |
Heliocentric radial velocity | 1,637 km/s [4] |
Distance | 91.9
Mly (28.2
Mpc)
[5] 75.0 Mly (23.01 Mpc) [6] 73.4 Mly (22.5 Mpc) [7] |
Apparent magnitude (B) | 12.80 |
Characteristics | |
Type | SAB(rs)cd, [8] SA(s)cd [9] |
Apparent size (V) | 1.320 ′ × 0.766′ [2] |
Other designations | |
IRAS 14198-0009, 2MASX J14222381-0023148, NGC 5584, UGC 9201, LEDA 51344, MCG +00-37-001, SDSS J142223.76-002315.6 [3] |
NGC 5584 is a barred spiral galaxy [8] in the constellation Virgo. It was discovered July 27, 1881 by American astronomer E. E. Barnard. [10] Distance determination using Cepheid variable measurements gives an estimate of 75 million light years, [6] whereas the tip of the red-giant branch approach yields a distance of 73.4 million light years. [7] It is receding with a heliocentric radial velocity of 1,637 km/s. [4] It is a member of the Virgo III Groups, a series of galaxies and galaxy clusters strung out to the east of the Virgo Supercluster of galaxies. [11]
The morphological 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 wound spiral arms (cd). It is flocculent in appearance with only a small nucleus. Star formation is occurring along the spiral arms. [8] The galactic 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] 250 Cepheid variables have been observed in NGC 5584. [1]
Two supernova events have been observed in NGC 5584. SN 1996aq was a Type Ic supernova discovered August 17, 1996 by Masakatsu Aoki in Japan. It was offset by 15 ″ west and 8″ south of the galactic center. It reached magnitude 14.7 on August 18. [13] SN 2007af was spotted at magnitude 15.4 on February 24, 2007 by K. Itagaki, also of Japan. This was a Type Ia supernova at an offset 40″ west and 22″ of the galaxy center. [14] A light echo of this event was observed about 1,000 days after its discovery. [15]
NGC 5584 | |
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![]() | |
Observation data ( J2000 epoch) | |
Constellation | Virgo |
Right ascension | 14h 22m 3.811s [2] |
Declination | −00° 23′ 14.82″ [2] |
Redshift | 0.005525 [3] |
Heliocentric radial velocity | 1,637 km/s [4] |
Distance | 91.9
Mly (28.2
Mpc)
[5] 75.0 Mly (23.01 Mpc) [6] 73.4 Mly (22.5 Mpc) [7] |
Apparent magnitude (B) | 12.80 |
Characteristics | |
Type | SAB(rs)cd, [8] SA(s)cd [9] |
Apparent size (V) | 1.320 ′ × 0.766′ [2] |
Other designations | |
IRAS 14198-0009, 2MASX J14222381-0023148, NGC 5584, UGC 9201, LEDA 51344, MCG +00-37-001, SDSS J142223.76-002315.6 [3] |
NGC 5584 is a barred spiral galaxy [8] in the constellation Virgo. It was discovered July 27, 1881 by American astronomer E. E. Barnard. [10] Distance determination using Cepheid variable measurements gives an estimate of 75 million light years, [6] whereas the tip of the red-giant branch approach yields a distance of 73.4 million light years. [7] It is receding with a heliocentric radial velocity of 1,637 km/s. [4] It is a member of the Virgo III Groups, a series of galaxies and galaxy clusters strung out to the east of the Virgo Supercluster of galaxies. [11]
The morphological 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 wound spiral arms (cd). It is flocculent in appearance with only a small nucleus. Star formation is occurring along the spiral arms. [8] The galactic 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] 250 Cepheid variables have been observed in NGC 5584. [1]
Two supernova events have been observed in NGC 5584. SN 1996aq was a Type Ic supernova discovered August 17, 1996 by Masakatsu Aoki in Japan. It was offset by 15 ″ west and 8″ south of the galactic center. It reached magnitude 14.7 on August 18. [13] SN 2007af was spotted at magnitude 15.4 on February 24, 2007 by K. Itagaki, also of Japan. This was a Type Ia supernova at an offset 40″ west and 22″ of the galaxy center. [14] A light echo of this event was observed about 1,000 days after its discovery. [15]