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A blue main sequence star with an unusual spectrum, Achernar has a magnitude of +0.54, making it the brightest of the stars of Eridanus, and the ninth brightest in the entire sky.
Bright Achernar lies at the extreme southern tip of the star-river Eridanus, less than a degree from its southernmost border with neighbouring Hydrus.
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ο1 Cygni π Cephei Pincoya 41 Draconis La Superba Polis Mekbuda Tengshe V1046 Tauri TWA 5 w Carinae s Velorum A Gakyid Guahayona GQ Lupi Chaophraya Dust-Ball e Aquilae HR 6842 Kepler-151 Kepler-102 KELT-20 75 Cygni k Hydrae j Puppis Ross 154 Ross 206 η Carinae Acubens Ross 156 Betelgeuse Alnilam α Centauri A Gliese 687 Arneb EI Cancri B Gliese 667 C Gliese 667 B Hatysa Capella EE Leonis θ Circini Gliese 887 Koeia Thabit ρ Cassiopeiae Kruger 60 A Teegarden's Star ε Indi HD 37131 Berehynia HD 37130 KR Muscae Proxima Centauri Gnomon ζ Arae Rigel ν2 Canis Majoris Brun 145 Alchiba ν Aquilae Ran θ Hydrae BF Orionis Polaris Tevel 47 Cygni Wolf 359 Xi Boötis B σ Orionis Mebsuta V1099 Orionis U Sagittarii FL Virginis V1030 Ori Alkaphrah DH Tauri d Lupi IL Aquarii Suhail Unurgunite Deneb Orkaria Struve 2398 B Mira Diya Petra Mirfak P Carinae V509 Cassiopeiae 6 Cassiopeiae Azmidi HR 1911 P Cygni Sirius B Moriah δ Muscae UY Scuti UV Ceti 15 Orionis Shaomin AX Microscopii Nashira Argelander's Star Gliese 1 Gliese 205 Wezen Hind's Crimson Star Antares Mu Aquilae Wolf 498 Sargas Naos Cerberus WX Ursae Majoris x Carinae Sadr Gliese 440 AU Microscopii HO Librae DO Cephei Alfirk b Velorum Maru Tureis van Maanen's Star Muspelheim f Velorum 52 Orionis ι1 Scorpii ο Capricorni B W Ceti χ Cygni Avior χ Centauri ZZ Ceti
Achernar
Hertzprung-Russell diagram plotting the temperature and luminosity of Achernar (marked by the red circle) relative to other stars.
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