5 Astraea is an asteroid. It is a large and bright asteroid of main-belt. It was fifth asteroid to be discovered and also known as1969 SE.

It was discovered by German amateur astronomer, Karl Ludwig Hencke. He discovered it on December 8, 1845 at his private observatory.

It was named after Greek myth Astræa or Astrea, a daughter of Zeus and Themis or of Eos and Astraeus.