So a __geo_interface__ that is registered as such Altair, also called Alpha Aquilae, the brighest star in the northern constellation Aquila and the 12th brightest star in the sky. Star type. It is an A-type star 16.6 light-years from Earth.Altair rotates at the fast speed of more than 200 km (120 miles) per second. It lies only 16.7 light years from Earth. Altair has the stellar classification A7 V, indicating a white star that is still fusing hydrogen to helium in its core. Altair is the brightest star in the constellation Aquila and twelfth brightest star in the night sky . It is an A- type main sequence star Altair, or Alpha Aquilae, is the brightest star in the constellation Aquila, the Eagle.

The star has a visual magnitude of 0.77. The result of this approach is that the keys type and geometry in the properties member will be overwritten if used. At least 2 features of the star make it distinctive. With the bright stars Deneb and Vega, Altair (Arabic for “flying eagle”) forms the prominent asterism of the Summer Triangle. Altair serializes the metadata from the properties in combination with the declared geometry as Feature entities. Altair has also been shown to be a Delta Scuti-type variable star.

Altair has 1.79 times the Sun’s mass and an estimated radius between 1.63 and 2.03 times that of the Sun. Typically, Delta Scuti variable stars do not vary by large amounts, and in the case of Altair, its variations in brightness are measured in mere thousandths of a magnitude. Along with the stars Vega in Lyra constellation and Deneb in Cygnus, Altair forms the Summer Triangle, a prominent asterism in the northern hemisphere.

With a temperature in the range between 6,900 K and 8,500 K, it is 10.6 times more luminous than the Sun. According to one type of model calculations performed for the NASA Star and Exoplanet Database, the inner edge of Altair's habitable zone is located relatively far from the star at around 2.177 AUs from the star, while the outer edge lies even farther out at around 4.475 AUs. The Summer Triangle at about 10 p.m. local time in July from mid-northern latitudes. Altair is only 16.8 light-years from Earth, making it one of our closest stellar neighbors.