UY Scuti facts for kids

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UY Scuti zoomed in, Rutherford Observatory, 07 September 2014
Dense starfield around the red supergiant star UY Scuti. It is the brightest star in the image. Taken at the Rutherfurd Observatory in Columbia University, New York, 2011

UY Scuti is a bright red supergiant or hypergiant star. It is a pulsating variable star in the constellation Scutum. It is possibly the largest known star. It is also one of the most luminous and well-known of its kind.

The star has an estimated average median radius of 1,708 times that of the Sun, or a diameter of 2.4 billion km (1.5 billion mi; 15.9 AU); thus a volume 5 billion times that of the Sun.

It is about 2.9 kiloparsecs (9,500 light years) from Earth, so it is one of the nearest known hypergiants. If placed at the center of the Solar system, its photosphere would engulf the orbit of Jupiter. The radius is not known for certain, and may be larger than the orbit of Saturn.

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UY Scuti Facts for Kids. Kiddle Encyclopedia.