Sagittarius Dwarf Irregular Galaxy



The Sagittarius Dwarf Irregular Galaxy or SagDIG is a dwarf galaxy in the constellation of Sagittarius. It lies about 3.4 million light-years from Terra. SagDIG should not be confused with the Sagittarius Dwarf Elliptical Galaxy or SagDEG, a satellite galaxy of the Milky Way. It was discovered by Cesarsky et al. on a photographic plate taken for the ESO (B) Atlas on June 13, 1977 CE using the ESO 1 meter Schmidt telescope.

The SagDIG is the most remote object from the barycenter thought to be a member of the Local Group. It is only slightly outside the zero-velocity surface of the Local Group.

SagDIG is a much more luminous galaxy than Aquarius Dwarf and it has been through a prolonged star formation. This has resulted in it containing a rich intermediate-age population of stars. Twenty-seven candidate carbon stars have been identified inside SagDIG. Analysis shows that the underlying stellar population of SagDIG is metal-poor. Further, the population is young, with the most likely average age between 4 and 8 billion years for the dominant population.

No known Ancient Gate in this galaxy.