SDIG

Dwarf Irregular Galaxy SDIG (PGC 621), type IBm, in Sculptor

RA:
00 : 08.2
Dec:
-34 : 35
Type:
IBm
RV:
+ 207 km/s
Distance:
10,000 kly
Apparent Dimension:
1.1 x 0.9 arc min
Diameter:
Brightness:
+15.5 mag
Abs. Mag:
Mass:
Dwarf Irregular Galaxy SDIG was discovered in 1976 by a team of ESO astronomers, see Lautsen et.al. (1977). R.M. West first found it on a photographic plate taken with the ESO 1-m Schmidt telescope on October 22, 1976 by G. and O. Pizarro; further plates were consequently obtained on both the 1-m ESO Schmidt telescope and the then-new ESO 3.6-m telescope by S. Lautsen. They found that this new galaxy was definitely far beyond and thus unconnected to the nearby Magellanic Stream, and very probably beyond the borders of the Local Group.

Kraan-Korteweg & Tammann (1979) suspected it to be a possible member of the Local Group. Meanwhile however (e.g., Miller 1996), evidence has been confirmed that this galaxy is very probably a member of the Sculptor Group of Galaxies, sometimes called the South Polar Group, around famous NGC 253, at a distance of about 10 million light-years.

References:



[Local Group Home] | [SEDS] | [MAA] | [DSS] | [NED] | [SIMBAD] | [ADS]
Hartmut Frommert
Christine Kronberg
[contact]

Last Modification: October 23, 2003