● Achernar

  Achernar is a star in Eridanus.

                                               
                                               
                                               
                                               
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  Type            Blue-white main-sequence star
  Constellation   Eridanus
  Magnitude       0.5
  Spectral type   B3Vpe
  Distance        144 light years
  You need        naked eye

  Known as
  Bayer           α Eri
  Yale            HR 472

  More information about Achernar

  Achernar sits at the southern tip of Eridanus, and its name is the
  Arabic آخر النهر, "the end of the river", which is exactly where it is.
  It spins so fast, at something like 250 kilometres a second at its
  equator, that it is not round: it bulges outward, making it the most
  distorted star known. At 144 light years it is bright because it is hot
  and large rather than because it is near, and it never rises above about
  33 degrees north.

  Bayer lettered the stars of each constellation in his Uranometria of
  1603, in order of brightness. He was working from Tycho's magnitudes by
  eye, and the order he recorded is often wrong.

  First published in 1930 by Yale astronomer Frank Schlesinger, and
  maintained since, the Yale Bright Star Catalogue lists every star down
  to magnitude 6.5. It contains 9,110 stars.

  where it is tonight:  skymap.sh/Achernar