Delta Scorpii – Dschubba
A binary star system located at 136 parsecs (443.573 light year) from Earth in the constellation Scorpius.
δ Scorpii is the system’s Bayer designation. The two components are designated Delta Scorpii A and B.
The primary, δ Scorpii A, is a B class sub-giant surrounded by a disc of material spun off by the rapidly rotating star. The secondary, δ Scorpii B,
orbits every 10.5 years in a highly elongated elliptical orbit; it appears to be a normal B class main sequence star.
Delta Scorpii A is a Gamma Cass variable star.(the prototype variable star that it most resembles)
This type of star shows irregular slow brightness variations of a few hundredths of a magnitude due to material surrounding the star.
Delta Scorpii usually shines at magnitude 2.3 but has shown that it fluctuates to as bright as 1.8. It is easily visible to the unaided eye from most urban locations, so an easy one to watch by periodically glancing at the center star at the head of the Scorpion.
Delta Scorpii bore the traditional name Dschubba. In 2016 the International Astronomical Union organized a Working Group on Star Names (WGSN)
to catalogue and standardize proper names for stars. The WGSN approved the name Dschubba for δ Scorpii A on 21 August 2016 and it is now so
entered in the IAU Catalog of Star Names.
Captured with my 12″ diameter F4 TPO Newtonian telescope, Bisque ME Mount, Canon 6D DSLR, ISO 800, 3 minute exposure from my observatories in Yellow Springs, Ohio.