Sculptor Dwarf Irregular Galaxy

The Sculptor Dwarf Irregular Galaxy (SDIG) is an irregular galaxy in the constellation Sculptor. It is a member of the NGC 7793 subgroup of the Sculptor Group.[1] The galaxy was discovered in 1976.

Not to be confused with the Sculptor Galaxy or the Sculptor Dwarf Galaxy.
Sculptor Dwarf Irregular
Observation data (J2000 epoch)
ConstellationSculptor
Right ascension00h 08m 13.36s[1]
Declination−34° 34′ 42.0″[1]
Redshift221 ± 6 km/s[2]
Distance10.44 ± 0.33 Mly (3.2 ± 0.1 Mpc)[1]
Apparent magnitude (V)15.5[2]
Absolute magnitude (V)−11.87[1]
Characteristics
TypedIrr[1]
Apparent size (V)1′.1 × 0′.9[2]
Half-light radius (apparent)29″.4 ± 1″.6[1]
Other designations
SDIG,[2] PGC 621,[2] ESO 349-031[2]

Nearby galaxies and galaxy group information

The Sculptor Dwarf Irregular Galaxy and the dwarf galaxy UGCA 442 are both companions of the spiral galaxy NGC 7793.[3] These galaxies all lie within the Sculptor Group, a weakly bound, filament-like group of galaxies located near the Local Group.[3]

Sculptor Dwarf Irregular Galaxy close up by Hubble Space Telescope

See also
  • Sculptor Dwarf Galaxy – a dwarf spheroidal or elliptical galaxy, also in Sculptor, but significantly closer; a satellite of the Milky Way.

References
  1. Lianou, S.; Cole, A. A. (2013). "The star formation history of the Sculptor dwarf irregular galaxy". Astronomy & Astrophysics. 549: A47. arXiv:1211.0137. Bibcode:2013A&A...549A..47L. doi:10.1051/0004-6361/201220193. S2CID 55237783.
  2. "NASA/IPAC Extragalactic Database". Results for Sculptor Dwarf Irregular. Retrieved 2007-03-15.
  3. I. D. Karachentsev; E. K. Grebel; M. E. Sharina; A. E. Dolphin; et al. (2003). "Distances to nearby galaxies in Sculptor". Astronomy and Astrophysics (abstract). 404 (1): 93–111. arXiv:astro-ph/0302045. Bibcode:2003A&A...404...93K. doi:10.1051/0004-6361:20030170. S2CID 54977869.


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