NGC 7408 is a barred spiral galaxy in the constellation of Tucana. Its velocity with respect to the cosmic microwave background is 3,372±13 km/s, which corresponds to a Hubble distance of 162.2 ± 11.4 Mly (49.73 ± 3.49 Mpc). However, 12 non-redshift measurements give a closer mean distance of 142.80 ± 5.67 Mly (43.783 ± 1.739 Mpc). It was discovered by British astronomer John Herschel on 1 November 1834.

NGC 7408 is a Seyfert II galaxy, i.e. it has a quasar-like nucleus with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, the host galaxy is clearly detectable.

NGC 7329 group

NGC 7408 is a member of the NGC 7329 group (also known as LGG 462). This group contains at least 11 galaxies, including NGC 7329, NGC 7358, NGC 7417, IC 5222, IC 5227, IC 5244, IC 5250, IC 5266, IC 5272, and ESO 109-32.

Supernovae

Two supernovae have been observed in NGC 7408:

  • SN 2007bn (type unknown, mag. 17) was discovered by R. Martin and the Perth Observatory Automated Supernova Search on 18 April 2007.
  • SN 2009bu (TypeII-P, mag. 16.4) was discovered by Alessandro Dimai on 25 March 2009.

See also

External links

  • NGC 7408 on WikiSky: , , , , , , , ,