SWEEPS J175853.92-291120.6 is an F-type main-sequence star located 27,700 light years away from Earth, in the constellation of Sagittarius. This star has one known extrasolar planet.
Characteristics[]
Little is known about the characteristics of the star. The star has a magnitude of 18 with a mass of 1.24 solar masses and radius of 1.18 solar radii. The designation "SWEEPS J175853.92−291120.6" is named after the project SWEEPS, formally called the Sagittarius Window Eclipsing Extrasolar Planet Search. The project also found its planetary companion.
Planetary system[]
In 2006, a group of astronomers working on the SWEEPS program announced the discovery of a planet, named SWEEPS-04, in this system. The planet is a gas giant, who is close to the parent star at 0.05 AU. It is classified as a Hot Jupiter. At a distance of 27,700 light years, it is one of the most distant planets ever found.
| Planet | Mass | Semimajor axis | Orbital period (days) | Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| SWEEPS-04 | <3.8 Jupiter mass | 0.055 AU | 4.200 days | N/A | >87° | 0.81 Jupiter radius |