SWEEPS J175902.67−291153.5
SWEEPS J175902.67−291153.5 is marked with a green circle and the number 11. | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 17h 59m 02.67s[1] |
| Declination | −29° 11′ 53.5″[1] |
| Apparent magnitude (V) | 19.83[1] |
| Characteristics | |
| Spectral type | F9[2] |
| Astrometry | |
| Distance | 27,710[3] ly (8,500 pc) |
| Absolute magnitude (MV) | 5.95[2] |
| Details | |
| Mass | 1.10[4] M☉ |
| Radius | 1.45[4] R☉ |
| Database references | |
| SIMBAD | data |
SWEEPS J175902.67-291153.5 is an F9 spectral class star located in the constellation Sagittarius, approximately 27,710 light-years from Earth.[3] At least one planet, SWEEPS-11, orbits the star, which is currently, along with SWEEPS-04, the most distant known exoplanets.
It has an apparent magnitude of 19 and an absolute magnitude of 5.95.[2] The star's mass is 1.10 solar masses, and its radius is 1.45 solar radii.[4] The designation "SWEEPS J175902.67-291153.5" comes after the Sagittarius Window Eclipsing Extrasolar Planet Search (SWEEPS) project. This project also discovered its planetary companion.[5]
History of discovery
In 2004, the star came into the field of view of the Hubble Space Telescope. As part of the SWEEPS program, 16 exoplanet candidates were discovered around stars in the Galactic Center, including one exoplanet around SWEEPS J175902.67-291153.5.[5]
Planetary system
In 2006, a group of astronomers working on the SWEEPS program announced the discovery of the planet SWEEPS-11 in the system.[4] The planet is a hot Jupiter, nearly 10 times the mass of Jupiter, orbiting its parent star closely at a distance of 0.03 AU. The planet completes a full orbit around its star in approximately 1.8 days or 43 hours. The planet was discovered using the transit method.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| SWEEPS-11 | 9.7 ± 5.6 MJ | 0.03 | 1.796 | – | >84° | 1.13 ± 0.21 RJ |
See also
References
- ^ a b c "SWEEPS J175902.67-291153.5". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-02-23.
- ^ a b c Kashyap, Vinay L.; Drake, Jeremy J.; Saar, Steven H. (2008). "Extrasolar Giant Planets and X-Ray Activity". The Astrophysical Journal. 687 (2): 1339. arXiv:0807.1308. Bibcode:2008ApJ...687.1339K. doi:10.1086/591922.
- ^ a b c "HEC: Top 10 Exoplanets". Planetary Habitability Laboratory. 2015-12-05. Archived from the original on 2013-12-17. Retrieved 2018-02-23.
- ^ a b c d e Sahu, Kailash C.; Casertano, Stefano; Bond, Howard E.; Valenti, Jeff; Ed Smith, T.; Minniti, Dante; Zoccali, Manuela; Livio, Mario; Panagia, Nino; Piskunov, Nikolai; Brown, Thomas M.; Brown, Timothy; Renzini, Alvio; Rich, R. Michael; Clarkson, Will; Lubow, Stephen (2006). "Transiting extrasolar planetary candidates in the Galactic bulge". Nature. 443 (7111): 534–540. arXiv:astro-ph/0610098. Bibcode:2006Natur.443..534S. doi:10.1038/nature05158. PMID 17024085.
- ^ a b "Hubble Finds Extrasolar Planets Far Across Galaxy". НАСА. 2006-04-10. Archived from the original on 2018-12-26. Retrieved 2018-02-23.
External links
- "SWEEPS-11" (in Russian). планетные системы. Retrieved 26 July 2012.
- "Planet SWEEPS-11". Extrasolar Planets Encyclopaedia. Archived from the original on 23 February 2018. Retrieved 26 July 2012.
- This article is based on the Russian Wikipedia article, SWEEPS J175902.67−291153.5