Scorpio and antares can be seen in some parts of the northern hemisphere in summer, but the whole picture of Scorpio cannot be seen. There are 22 scorpios brighter than 4 stars, and there are countless other dark stars. Antares is a visual binary star, the main star is a semi-regular variable star, and the apparent magnitude varies from 0.9 to 1.8. Its companion star is a red giant star with an apparent magnitude of 5.4, a composite star with an apparent magnitude of 0.96 and an absolute magnitude of -4.7.