NGC 1156

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NGC 1156
NGC 1156 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Aries
Right ascension 02h 59m 42.2s[1]
Declination +25° 14′ 14″[1]
Redshift 375 ± 1 km/s[1]
Apparent magnitude (V) 12.3[1]
Type IB(s)m[1]
Apparent size (V) 3′.3 × 2′.5[1]
Other designations
UGC 2455,[1] PGC 11329[1]
See also: Galaxy, List of galaxies

NGC 1156 is a dwarf irregular galaxy in the Aries constellation of the type ibm. It is considered a Magellanic-type irregular. The galaxy has a larger than average core, and contains zones of contra-rotating gas. The counter-rotation is thought to be the result of tidal interactions with another gas rich galaxy some time in the past.

The AGES survey has discovered a candidate dark galaxy close to NGC 1156, one of only a few so far found.

It has a H II nucleus.[2]

External links[edit]


  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 1156. Retrieved 2006-11-27.
  2. ^ Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. 112. pp. 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041.