When was altair discovered

Altair is at around It is one of the closest stars to us, visible to the naked eye. Altair is almost 11 times brighter than our sun. It has a visual magnitude of 0. It is a variable type of star, classified as a Delta Scuti variable.

Its variations in luminosity occur over periods that range from 0. Altair completes one spin on its axis in around 8. Because of its rotational speed, its poles are flattened and the temperatures on its surface vary from its equator to its poles. Temperatures have been estimated to range from 6. It may be that due to these temperatures and variations, convention cells who migrate from the hot regions to the cooler regions may produce low-level X-ray emissions.

Altair is located in the constellation of Aquila — the eagle. It forms a line of stars known as the Shaft of Aquila along with the second and third brightest stars of the constellation. She descended from the heavens to greet him, and as they got to know each other she fell deeply in love.

Vega promises Altair that no matter what they will be together in the heavens. His fury only grows when he discovers that Vega promised to bring Altair up to the heavens with here.

The two lovers were placed in the sky as stars. Yet while they were both in the heavens, they were not together. The great Celestial River, known to us as Milky Way separated them. Altair is located It is a normal, A-type, white main-sequence star which is around 1. At its current rotational speed, Altair rotates once every nine hours, in contrast to the Sun that takes around 25 days to complete one revolution.

Altair has also been shown to be a Delta Scuti-type variable star. 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.

Altair is a perfect example—it rotates at least once every For a star that spins slowly, this effect is miniscule.

For example, our Sun rotates once every 30 days and has an equator only. By measuring Altair's size at separate positions along its edge, van Belle and his colleagues determined that Altair rotates at a speed of at least kilometers per second , miles per hour at the equator. Future studies may pin down the speed more precisely. The Palomar Testbed Interferometer has three centimeter inch telescopes.