When was nml cygni discovered

These dust envelopes are formed by the high mass emission rate. Because of its unique position in the Milky Way, the star does not dominate its local interstellar environment. NML Cyg is a massive oxygen-rich star. All content from Kiddle encyclopedia articles including the article images and facts can be freely used under Attribution-ShareAlike license, unless stated otherwise.

Apparent Magnitude is also known as Visual Magnitude. Absolute Magnitude is the apparent magnitude of the star from a distance of 10 parsecs or This assumes that there is nothing in between the object and the viewer such as dust clouds. To really compare the brightness of the star, it is best to use Absolute rather than Apparent Magnitude.

Our own Sun is the brightest star and therefore has the lowest of all magnitudes, A faint star will have a high number. NML Cygni is an estimated 5, It would take a spaceship 5, We don't have a space ship that can travel that distance or at that speed yet.

If placed at the center of the Solar System , its surface would extend the orbit of Saturn or Uranus. NML Cygni was discovered in by American astronomers Neugebauer, Martz, and Leighton who described two extremely red luminous stars, their colour being consistent with a black body temperature of 1, K.

The name NML comes from the names of these three discoverers. NML Cygni has since also been given the designation V Cygni on account of the small semi-regular brightness variations, but is still most commonly referred to as NML Cygni.

Its composition began to be revealed with the discovery of OH masers MHz in It is also a semiregular variable star with a period of either 1, or days. The annual parallax of NML Cygni is measured to be around 0. From the observations, it is estimated that NML Cygni has two discrete optically thick envelopes of dust and molecules. The optical depth of the inner shell is found to be 1. Because of the star's position on the outskirts of the massive Cygnus OB2 association, the detectable effects of NML Cygni's radiation on the surrounding dust and gas are limited to the region away from the central hot stars of the association.

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