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Proper Name	None
Bayer Designation	None
Flamsteed Number	None
HR (BSC)	None
HD	None
Other Designations	M51-ULS-1
Constellation	Canes Venatici
Right Ascension	13h 29m 43s
Declination	+47° 11' 34"
Distance	c.27,400,000 light years c.8,400,000 parsecs (Parent galaxy)
Magnitude	Apparent: +7.92 Absolute: -21.75 (Parent galaxy)
Spectral Class	B I blue supergiant (primary star, probable type)
Planets in this system	M51-ULS-1 b, small gas giant or ice giant (unconfirmed)
Optimum Visibility	April / May (Usually visible from northern latitudes)

M51-ULS-1 is a binary system in the western spiral arm of the Whirlpool Galaxy, consisting of a blue supergiant with a companion stellar remnant. It is notable as being the parent system of M51-ULS-1 b, the first extrasolar planet to be discovered in a galaxy beyond the Milky Way. Imagery provided by Aladin sky atlas

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