Ras Alhague (von arab. رأس الحية raʾs al-ḥayya "Kopf der Schlange") ist der Name des Sterns α Ophiuchi (Alpha Ophiuchi). Ras Alhague hat eine scheinbare Helligkeit von +2,08 mag. Ras Alhague gehört dem Spektraltyp A5 an und ist ca. 47 Lichtjahre entfernt (Hipparcos-Datenbank).
Koordinaten (Äquinoktium 2000):
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Alpha Ophiuchi — (Ras Alhague) … Wikipédia en Français
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