NGC3905 is a barred spiral galaxy in the constellation of Crater. Its velocity with respect to the cosmic microwave background is , which corresponds to a Hubble distance of . However, six non-redshift measurements give a closer mean distance of . It was discovered by English astronomer Andrew Ainslie Common in 1880.
NGC3905 is 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.
LDC 824 group NGC 3905 is a member of the LDC 824 group of galaxies. This group contains 18 galaxies, including , , , , , , , , , , and seven others.
Supernovae Three supernovae have been observed in NGC 3905: SN2001E (TypeIa, mag. 17.6) was discovered by LOTOSS (Lick Observatory and Tenagra Observatory Supernova Searches) on 5 January 2001. SN2009ds (TypeIa, mag. 16.8) was discovered by Kōichi Itagaki on 28 April 2009. SN2014V (TypeII, mag. 18.4) was discovered by Pan-STARRS on 21 February 2014.
See also List of NGC objects (3001–4000)
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