Achernar (Alpha Eridani)
Achernar is extremely flattened by its rapid spin. Image: ESO
The ninth brightest star in the sky but one that is not well known to northern observers as it can only be seen at latitudes below 32° N.
Alpha Eridani
Rana system (Delta Eridani)
Epsilon Eridani
Sigma Eridani (there is no "Sigma" star in the modern Eridanus constellations)
40 Eridani A (Omicron-2 Eridani)
Acamar (Theta Eridani)
Fornax (Fornacis) ...
ACHERNAR (Alpha Eridani). There are 22 classical "first magnitude" stars in the sky.
Achernar or Alpha Eridani is the bright star at the southernmost end of the constellation Eridanus (the river) and is always below the horizon from UK skies.
The star, Achernar (Alpha Eridani), is the brightest in the southern constellation Eridanus (The River). Achernar has a mass of 6 times that of the sun. The surface temperature is about 20,000 K and it is located at a distance of 145 light-years.
It lies in the southwest corner of (1:42:29.3-53:44:27.0, ICRS 2000.0) of Constellation Eridanus, the River -- northeast of Achernar (Alpha Eridani) and southwest of Chi, Phi, Kappa, and Theta1,2 Eridani (Acamar).
Achernar (α Eri / α Eridani / Alpha Eridani) is the brightest star in the constellation Eridanus and the ninth brightest star in the nighttime sky. It lies at the southern tip of the constellation.
The constellation's brightest star, first-magnitude Alpha Eridani, is called Achernar, from the Arabic meaning ‘the river's end'; it does indeed mark the southern end of Eridanus.
Despite being among the largest constellations, Eridanus does not have many bright stars or visible deep sky objects. The most notable stars are [3679] alpha Eridani or Achernar ("end of the river") and [3688] epsilon Eridani, ...
According to Allen, this star, Theta Eridani, was originally recognized as the end of the River Eridanus and therefore bore the name Achernar. This name now applies to Alpha Eridani instead.
Curiously theta Eridani bears nearly the same name, Acamar. This is a variation on Achernar since this star was once the river's terminus and it then bore the name now carried by alpha Eridani.
Double stars: ...
 See also: Achernar, Star, Eridanus, Light, Sun
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