669 Kypria is a minor planet orbiting the Sun that was discovered by German astronomer August Kopff on 20 August 1908. It is named after the lost Greek poem Cypria, which explained the causes of the Trojan War and served as a prequel to the Iliad.
This body is a member of the dynamic Eos family of asteroids that most likely formed as the result of a collisional breakup of a parent body. It is orbiting the Sun with a semimajor axis of and a low eccentricity of 0.076, causing it to vary in distance from during each orbital period of 5.23 years. The orbital plane is inclined at an angle of 10.79° relative to the plane of the ecliptic.
669 Kypria is classified as a stony S-type asteroid. infrared data yields a diameter estimate of . Photometric data collected during 2007 was used to construct a lightcurve of this asteroid. It showed a synodic rotational period of hours with a brightness variation of 0.60 in magnitude.
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