SWEEPS J175853.92−291120.6
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 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sagittarius[1] |
| Right ascension | 17h 58m 53.92s[1] |
| Declination | –29° 11′ 20.6″[1] |
| Apparent magnitude (V) | 18.80[1] |
| Characteristics | |
| Spectral type | F5V[2] |
| Astrometry | |
| Distance | 27,700 ly (8,500[1] pc) |
| Details | |
| Mass | 1.24[1] M☉ |
| Radius | 1.18[1] R☉ |
| Metallicity [Fe/H] | 0.00[3] dex |
| Database references | |
| SIMBAD | data |
SWEEPS J175853.92-291120.6 is a star located in the constellation Sagittarius at a distance of 27,700 light-years from Earth. At least one planet, SWEEPS-04, is known to orbit the star.[4]
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.
In 2006, a group of astronomers working on the SWEEPS program announced[1] 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 due to its proximity to the parent star. The planet was discovered through the transit method.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| SWEEPS-04 | <3.8 MJ | 0.055 | 4.200 | – | — | 0.81 ± 0.10 RJ |
