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NGC 2146 is a barred spiral galaxy visible in the constellation of the Giraffe, with dimensions of 6'x3.8 'and magnitude 11.4.
Its peculiarity is that of having a spiral arm lying on the nucleus of the galaxy itself, this following a close encounter with another galaxy which occurred about 800 million years ago and which folded the arm itself by 45 °.
This cosmic collision is probably also responsible for the intense star-formation rate so much that NGC 2146 is classified as a starburst galaxy.