Altair 4

Altair 4 may refer to:
 * The fictional planet Altair IV, in the 1956 film Forbidden Planet
 * The storage planet named after Forbidden Planet's Altair IV from the novel The Tommyknockers by Stephen King
 * A potential future NASA lunar landing mission
 * A song from the 1990 album Tales from the Twilight World, by German power metal band Blind Guardian