Beta Geminorum


Distance (Light Years) 33.7 ± 0.3
Apparent Magnitude 1.16
Color (B-V)1

Names For This Star

The name of the star Pollux is Latin. This represents the immortal twin. In Greek, he was known as Polydeuces. An alternative name for the star is Hercules, the Latinized version of Heracles, who was the great hero who accomplished the Twelve Labors.

Description of the Star

According to Burnham, Pollux is the 14th brightest star in the sky. The star is an orange K0IIIb giant star having a luminosity about 30 times that of the sun.

The spectral type of the star implies a temperature of about 4500 K, a mass of maybe 4 times that of the sun, and a diameter about 16 times that of the sun.

Other Designations For This Star


78 Geminorum

Hipparcos Identifier (HIP Number)


Harvard Revised (HR Number)


Henry Draper Catalog (HD Number)


Bonner Durchmusterung (BD Number)

BD+28 1463
Smithsonian Astrophysical
Observatory compendium (SAO Number)

Fundamental Katalog (FK5 Number)



Copyright © 1998 - 2010 by Arnold V. Lesikar,
Professor Emeritus
Dept. of Physics, Astronomy, and Engineering Science,
St. Cloud State University,St. Cloud, MN 56301-4498

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