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M51-ULS-1

Proper NameNone
Bayer DesignationNone
Flamsteed NumberNone
HR (BSC)None
HDNone
Other DesignationsM51-ULS-1
ConstellationCanes Venatici
Right Ascension13h 29m 43s
Declination+47° 11' 34"
Distancec.27,400,000 light years
c.8,400,000 parsecs
(Parent galaxy)
MagnitudeApparent: +7.92
Absolute: -21.75
(Parent galaxy)
Spectral ClassBI blue supergiant (primary star, probable type)
Planets in this system M51-ULS-1 b, small gas giant or ice giant (unconfirmed)
Optimum VisibilityApril / 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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