Rasalgethi B

Alpha2 Herculis


Distance (Light Years) 382 ± 126
Apparent Magnitude 2.78
Color (B-V)

Description of the Star

Rasalgethi B is a close binary consisting of a yellow G5III giant and a yellowish F2V main sequence star revolving in a nearly circular orbit around their common center of mass. The period is 51.6 days. The masses of the two stars are estimated to be 4.1 and 2.5 solar masses respectively.

Other Designations For This Star


64 Herculis

Hipparcos Identifier (HIP Number)

Harvard Revised (HR Number)


Henry Draper Catalog (HD Number)


Bonner Durchmusterung (BD Number)

BD+14 3207
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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