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Proper NameNone
Bayer DesignationOmega1 Scorpii
Flamsteed Number9 Scorpii
HR (BSC)5993
Right Ascension16h 6m 48s
Declination-20° 40' 9"
Distance471 light years
145 parsecs
MagnitudeApparent: +4.0
Absolute: -1.9
Spectral ClassB1V Blue Dwarf
Optimum VisibilityJune
NotesThis is a highly luminous blue dwarf star, though its distance from Earth, and a drift of intervening galactic dust, lessen its apparent brightness somewhat. It is one of more than four hundred stars belonging to the widespread Scorpius-Centaurus Association running through this part of the sky.

Omega1 Scorpii is the blue star centred in this image, and its yellow-white companion to the southeast is Omega2 Scorpii. While the two stars are just a quarter of a degree apart as seen from Earth, they are widely separated in space, with blue Omega1 falling almost twice as far from the Sun than the closer but less luminous yellow Omega2. Imagery provided by Aladin sky atlas


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