NGC 7124 is a large spiral galaxy in the constellation of Indus. Its velocity with respect to the cosmic microwave background is 4988 ± 15 km/s, which corresponds to a Hubble distance of 73.57 ± 5.16 Mpc (∼240 million light-years).[1] It was discovered by British astronomer John Herschel on 8 July 1834.[2]

NGC 7124
The spiral galaxy NGC 7124.
Observation data (J2000 epoch)
ConstellationIndus
Right ascension21h 48m 05.39s[1]
Declination−50° 33′ 54.8″[1]
Redshift0.017251 [1]
Heliocentric radial velocity5172 ± 8 km/s[1]
Distance240.0 ± 16.8 Mly (73.57 ± 5.16 Mpc)[1]
Apparent magnitude (V)12.3[1]
Characteristics
TypeSB(rs)bc[1]
Size~206,200 ly (63.21 kpc) (estimated)[1]
Apparent size (V)2.8' x 1.1'[1]
Other designations
IRAS 21447-5047, 2MASX J21480540-5033549, PGC 67375, ESO 237- G 002[1]

NGC 7124 is classified as a LINER galaxy, i.e. it has a type of nucleus that is defined by its spectral line emission which has weakly ionized or neutral atoms, while the spectral line emission from strongly ionized atoms is relatively weak.[1]

One supernova has been observed in NGC 7124: SN 2023pwl (type Ia, mag 16.7).[3]

See also

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References

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  1. ^ a b c d e f g h i j k l "NASA/IPAC Extragalactic Database". Results for NGC 7124. Retrieved 6 August 2024.
  2. ^ Celestial Atlas entry for NGC 7124. Retrieved 6 August 2024.
  3. ^ Transient Name Server entry for SN 2023pwl. Retrieved 6 August 2024.
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