The Delta Lyrae cluster or Stephenson 1[6] is a sparse open cluster of stars located about 1,220[2] light years away in the northern constellation of Lyra.

However, subsequent photometric observations at the Palomar and Mount Wilson observatories led American astronomer Olin J. Eggen to demonstrate that there was an actual cluster, at least for the observed stars down to absolute magnitude +5.5.

[7] The cluster has a visual magnitude of 3.8 and spans an angular diameter of 20 arc minutes.

[4] Based upon its estimated age and motion through space, it may be associated with the Gould Belt.

[5] It includes an Algol variable star, BD+36° 3317, discovered in 2007 from Spain: this is a spectroscopic binary star system that undergoes regular eclipses because the orbital plane is nearly aligned with the line of sight to the Earth.