Claim: The binary star system Delta microscopii is visible to the naked eye with an apparent +5.68 visual magnitude, or the measure of star brightness.
Evidence: δ Microscopii, Latinised as Delta Microscopii, is a faint, orange hued binary star system in the constellation Microscopium, marking the eyepiece end of the "microscope". It is just visible to the naked eye with an apparent visual magnitude of +5.68. Apparent magnitude (m) is a measure of the brightness of a star or other astronomical object observed from Earth.