Some time ago, the distance of this galaxy to us was an unknown. Thanks to the discovering of Cepheid stars what allowed that measurement to be 7.3 million light years.
NGC55 and NGC300, both belonging to Sculptor galaxy's cluster, are gravitationally connected, due to its close distance.
It is interesting to note how NGC55 resemble our Large Magellanic Cloud.
For additional information about NGC55 and the presence of Cepheid stars, please have a look on the link:

Luminance: 17x1200sec bin 1x1
RGB: 12x900sec bin 1x1

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