Physically, Alpha Lacertae is a main sequence star and, like most stars (including the Sun), generates energy through the fusion of hydrogen into helium. It is, however, about ten times as massive as the Sun, and consequently much more luminous. It has a high surface temperature of about 10,000 K, and so shines with a fierce white light. Alpha Lacertae has an optical companion, which is much fainter than the primarystar at magnitude +11.8.
From Earth, Alpha Lacerta lies in the northern part of its home constellation of Lacerta, against the backdrop of the Milky Way. It can prove difficult to pick out, since it is not noticeably brighter than many of its neighbouring stars; it forms the second point in the descending 'zig-zag' that forms the backbone of the Lizard. Lacerta itself occupies the faint space between Andromeda and Cygnus, and is best observed in August and September.