Beta Ceti


Distance (Light Years) 96 ± 2
Apparent Magnitude 2.04
Color (B-V)1.02

Names For This Star

This star is also known as Deneb Kaitos, Difda, Difda al Thani, or Rana Secunda.

The name Deneb Kaitos derives from the Arabic Al Dhanab al Kaitos al Janubiyy, "The Tail of the Whale Towards the South."

The names Diphda, Difda and Difda al Thani come from the Arabic name Al Difdi` al Thani meaning "The Second Frog."

Rana Secunda is a Latin translation of Al Difdi` al Thani.

For the Arabs Diphda was the Second Frog with Fomalhaut as the First Frog.

Description of the Star

The The Bright Star Catalog gives the spectral type of Diphda as G9.5IIICH-1. Burnham" classifies the star as K1III, while the "Hipparcos Catalog" offers a classification of K0III. All of these classifications indicate a yellow-red giant star at about 4500 K and about 4 times the mass of the sun.

Diphda is about 110 times as luminous as the sun.

Other Designations For This Star


16 Ceti

Hipparcos Identifier (HIP Number)


Harvard Revised (HR Number)


Henry Draper Catalog (HD Number)


Bonner Durchmusterung (BD Number)

BD-18 115
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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