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Mu1 & Mu2 SCORPII (AKA XAMIDIMURA & PIPIRIMA)
STARS IN SCORPIUS
(Image centered at: ra 12 h: 40 m / dec -11º 37')
CLICK THE IMAGE FOR A HIGH RESOLUTION VIEW
June 2025, Home Backyard in Martinez, Buenos Aires, Argentina
DATA
TYPE: Stars
APPARENT SEPARATION: 5.35 arc minutes
APPARENT MAGNITUDE (V): M1 scorpii 2.94-3.32 & M2 scorpii 3.53
DISTANCE: M1 scorpii 822 light years & M2 scorpii 517 light years
IMAGE INFORMATION
INSTRUMENT: 6" ORION OPTICS UK (Ultra Grade Optics) w/Sky Watcher Coma Corrector (0.9x) working at at f4.5
CAMERA: QHY 183 MONO
MOUNT: VIXEN GDPX, OAG with Starlight Xpress Lodestar
FILTERS: OPTOLONG LRGB Set
SKY CONDITIONS: urban skies - Bortle 8
EXPOSURES: LRGB (45,45,45,45)
OBJECT DESCRIPTION AND IMAGE SESSION
Mu1 and Mu2 Scorpii are two stars that appear close together in the sky, but are actually unrelated and at different distances. Mu1 Scorpii is a binary star system known as Xamidimura, while Mu2 Scorpii is a separate star, also known by the name Pipirima. Both stars are part of the Scorpius Constellation.
To the upper left we have Mu1 Scorpii which is a binary star system, meaning it consists of two stars orbiting each other. The two stars are very close together, so close that they are deformed by their mutual gravity and transfer matter between them. The combined apparent visual magnitude of the pair is about magnitude 3, making it one of the brighter members of Scorpius. This system is a member of the Scorpius–Centaurus association, the nearest OB association of co-moving stars to the Sun.
Mu2 Scorpii, the one at the lower right, is a blue-white B-type sub giant star with a stellar classification of B2 IV. It has an estimated diameter of 5.6 solar radii and a mass of 9.1 times the Sun's mass and shines with 2,385 times the Sun's luminosity. The large mass of this star make it a supernova progenitor.