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Cetus is home to the barred spiral galaxy Messier 77 and several well-known stars: Diphda (Beta Ceti), Menkar (Alpha Ceti), Tau Ceti and the famous variable star Mira (Omicron Ceti). It also hosts Earendel, the most distant star discovered to date. Facts, location and map
Mira ("wonderful", named by Bayer: Omicron Ceti, a star of the neck of the asterism) was the first variable star to be discovered and the prototype of its class, Mira variables. Over a period of 332 days, it reaches a maximum apparent magnitude of 3 - visible to the naked eye - and dips to a minimum magnitude of 10, invisible to the unaided eye.
The star Mira, also known as o-Cet, was the first variable star to be discovered, by David Fabricius in 1596. Its brightness fluctuates between mag 3 and 10 with a 332-day period. Today it is the prototypical example of the Mira class of variable stars.
StarsGalaxiesDiphda (mag 2.0)Menkar (mag 2.5)NGC 247 (mag 8.9)η-Cet (mag 3.4)IC 1613 (mag 9.0)τ-Cet (mag 3.5)IC 127 (mag 9.2)Mar 3, 2016 · M77 was discovered in 1780 by Charles Messier’s associate, Pierre Méchain, who described it as a nebula, while Messier and William Herschel both thought the object to be a large cluster of stars. M77 is a known radio source due to its active nucleus, which is obscured by dense intergalactic dust.
May 5, 2017 · Of all the stars in Cetus, the very first you must look for in binoculars is Mira. Omicron Ceti was the very first variable star discovered and was perhaps known as far back as ancient...
Apr 4, 2003 · Cetus is the location of the first variable star to be discovered. Omicron Ceti, or Mira, was originally observed by David Fabricius in 1596. The star changes from 2.0 to 10.1 in magnitude, and when at its brightest it is one of the brightest stars in the night sky.
Dec 20, 2023 · The brightest star in Cetus goes by three different names: Beta Ceti, Diphda and Deneb Kaitos. This star shines at magnitude 2, lies in the tail of the beast and is 96 light-years away.
