SWEEPS J175853.92-291120.6 is a star located in the constellation

Sagittarius Sagittarius ( ) may refer to: *Sagittarius (constellation) *Sagittarius (astrology), a sign of the Zodiac Ships *''SuperStar Sagittarius'', a cruise ship * USS ''Sagittarius'' (AKN-2), a World War II US Navy cargo ship Music *Sagittarius (ban ...

at a distance of 27,700

light-years A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 101 ...

from Earth. At least one planet,

SWEEPS-04 SWEEPS-04 is an extrasolar planet orbiting the star SWEEPS J175853.92−291120.6 in the constellation Sagittarius approximately 27,710 light years away (based on a distance modulus of 14.1) from the Solar System, making it (along with SWEEPS-1 ...

, is known to orbit the star. The star has a

magnitude Magnitude may refer to: Mathematics *Euclidean vector, a quantity defined by both its magnitude and its direction *Magnitude (mathematics), the relative size of an object *Norm (mathematics), a term for the size or length of a vector *Order of ...

of 18 with a mass of 1.24

solar mass The solar mass () is a standard unit of mass in astronomy, equal to approximately . It is often used to indicate the masses of other stars, as well as stellar clusters, nebulae, galaxies and black holes. It is approximately equal to the mass o ...

es and radius of 1.18

solar radii Solar radius is a unit of distance used to express the size of stars in astronomy relative to the Sun. The solar radius is usually defined as the radius to the layer in the Sun's photosphere where the optical depth equals 2/3: :1\,R_ = 6.957\t ...

. The designation "SWEEPS J175853.92−291120.6" is named after the project SWEEPS, formally called the

Sagittarius Window Eclipsing Extrasolar Planet Search The Sagittarius Window Eclipsing Extrasolar Planet Search, or SWEEPS, was a 2006 astronomical survey project using the Hubble Space Telescope's Advanced Camera for Surveys - Wide Field Channel to monitor 180,000 stars for seven days to detect ext ...

. The project also found its planetary companion.

Planetary system

In 2006, a group of astronomers working on the

SWEEPS Nielsen Media Research (NMR) is an American firm that measures media audiences, including television, radio, theatre, films (via the AMC Theatres MAP program), and newspapers. Headquartered in New York City, it is best known for the Nielsen rati ...

program announced the discovery of the planet SWEEPS-04 in the system. The planet is a gas giant that is close to the parent star at 0.05 AU. The planet is classified as a

hot Jupiter Hot Jupiters (sometimes called hot Saturns) are a class of gas giant exoplanets that are inferred to be physically similar to Jupiter but that have very short orbital periods (). The close proximity to their stars and high surface-atmosphere temp ...

due to its proximity to the parent star. The planet was discovered through the

transit method Any planet is an extremely faint light source compared to its parent star. For example, a star like the Sun is about a billion times as bright as the reflected light from any of the planets orbiting it. In addition to the intrinsic difficulty o ...

References

External links

* * * This article is based on the Russian Wikipedia article, SWEEPS J175853.92-291120.6 {{DEFAULTSORT:SWEEPS J175853.92-291120.6 Sagittarius (constellation) Planetary systems with one confirmed planet F-type main-sequence stars Planetary transit variables Sagittarius Window Eclipsing Extrasolar Planet Search

Planetary system

See also

References

External links