The latter is close by and appears to be interacting with IC 1727.
The smaller constellation was not recognised by the International Astronomical Union (IAU) when the constellations were established in the 1920s. ==Characteristics== A small constellation, Triangulum is bordered by Andromeda to the north and west, Pisces to the west and south, Aries to the south, and Perseus to the east.
The three-letter abbreviation for the constellation, as adopted by the IAU in 1922, is "Tri".
The official constellation boundaries, as set by Belgian astronomer Eugène Delporte in 1930, are defined as a polygon of 14 segments.
3C 48 was the first quasar ever to be observed, although its true identity was not uncovered until after that of 3C 273 in 1963.
A huge starspot larger than the diameter of the sun was detected on its surface in 1999 by astronomers using Doppler imaging. Two star systems appear to have planets.
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