Or rather, let him first closely examine this star with the naked eye.

The star is easily identified, since it lies to the left of Vega, forming with [zeta] a small equilateral triangle.

A careful scrutiny suffices to indicate a peculiarity in this star.

If our observer possesses very good eye-sight, he will distinctly recognise it as a "naked-eye double"; but more probably he will only notice that it appears lengthened in a north and south direction.[4] In the finder the star is easily divided.
Applying a low power to the telescope itself, we see [epsilon] Lyrae as a wide double, the line joining the components lying nearly north and south.

The southernmost component (the upper in the figure) is called [epsilon]^{1}, the other [epsilon]^{2}.