NGC 3974

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NGC 3974
NGC 3974 PanS.jpg
The lenticular galaxy NGC 3974
Observation data (J2000 epoch)
Constellation Crater
Right ascension 11h 55m 40.174s [1]
Declination −12° 01′ 38.431″ [1]
Redshift 0.019133 [1]
Heliocentric radial velocity 5736 ± 32 km/s [1]
Distance 293.4 ± 20.7  Mly (89.96 ± 6.34  Mpc) [1]
Apparent magnitude  (V)13.4 [1]
Characteristics
Type (R')SB0/a?(r) [1]
Size~80,500  ly (24.67  kpc) (estimated) [1]
Apparent size  (V)1.2′ × 1.1′ [1] [1]
Other designations
2MASX J11554013-1201386, MCG -02-31-001, PGC 37452 [1]

NGC 3974 is a lenticular galaxy in the constellation of Crater. Its velocity with respect to the cosmic microwave background is 6099 ± 41 km/s, which corresponds to a Hubble distance of 89.96 ± 6.34 Mpc (∼293 million light-years). [1] However, one non-redshift measurement gives a much closer distance of 56.6 Mpc (185 Mly). [2] It was discovered by British astronomer John Herschel on 9 March 1828. [3]

Contents

NGC 3974 is possibly 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 3974: SN 2024gra (type Ia, mag 18.8625) was discovered by the Automatic Learning for the Rapid Classification of Events (ALeRCE) on 16 April 2024. [4]

See also

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References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 "Results for object NGC 3974". NASA/IPAC Extragalactic Database. NASA and Caltech . Retrieved 4 August 2024.
  2. ↑ "Distance Results for NGC 3974". NASA/IPAC EXTRAGALACTIC DATABASE. NASA . Retrieved 14 December 2024.
  3. ↑ Celestial Atlas entry for NGC 3974. Retrieved 4 August 2024.
  4. ↑ "SN 2024gra". Transient Name Server. IAU . Retrieved 15 December 2024.
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