NGC 3561
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NGC 3561, also known as Arp 105, is a pair of interacting galaxies NGC 3561A and NGC 3561B within the galaxy cluster Abell 1185 in Ursa Major. It was discovered by British astronomer John Herschel on 30 March 1827.[1] Its common name is "the Guitar" and contains a small tidal dwarf galaxy known as Ambartsumian's Knot that is believed to be the remnant of the extensive tidal tail pulled out of one of the galaxies.[2]
One supernova has been observed in NGC 3561A: SN 1953A (type unknown, mag. 16) was discovered by Halton Arp on 16 April 1953.[3][4]
Image gallery
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SDSS image of NGC 3561B (lower and brightest round spot of "the guitar") and NGC 3561A (oval shape above NGC 3561B). Ambartsumian's Knot is the blue speck below NGC 3561B.
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References
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- ↑ Galaxies with Proper Names
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External links
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