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EspañolHD 188753
'HD 188753' is a triple star system approximately 149 light-years away in the constellation Cygnus. The system is also known as ADS 13125, Ho 581, BD+41°3535,[1][2] HIP 98001, and WDS 19550+4152.[3]
This star system is only the second triple-star system known to have a planet orbiting it,[4] HD 188753 Ab, which was discovered in 2005 by Polish astronomer Dr. Maciej Konacki.
| Contents |
| Stars |
| Planetary system |
| HD 188753 in fiction and mythology |
| See also |
| References |
| External links |
| About |
| News |
Stars
The primary star (HD 188753 A) is a 1.06 solar mass G-type (yellow dwarf).
Orbiting this at a distance separated from the primary star at approximately midway between the Sun-Saturn and Sun-Uranus distance: 12.3 AU, are two stars orbiting each other. These have a total mass of 1.63 solar masses and orbit the primary with an eccentricity of 0.50 (an earlier estimate put the eccentricity at 0.26±0.07[5]).
The secondary (HD 188753 B) has a spectral class of K (orange dwarf), and the tertiary (HD 188753 C) is an M-type (red dwarf). These orbit each other in 156 days, and the primary in 25.7 years.
Planetary system
In 2005 the discovery of HD 188753 Ab was the first known planet in a triple star system. It has been discovered by a Polish astronomer working in the United States, Dr. Maciej Konacki.[6]
The detection of this planet has been challenged by Eggenberger et al. [7][8]
An artist's conception of HD 188753 Ab looking at its suns.
The planet, a gas giant slightly larger than Jupiter, orbits the star HD 188753 A. The planet, which is at least 14% larger than Jupiter, orbits the main star once every 80 hours or so (3.3 days), at a distance of about 8 Gm, a twentieth of the distance between Earth and the Sun.
HD 188753 in fiction and mythology
See 'Rizq' for a discussion of the role HD 188753 plays in Nuwaubian mythology.
See also
HD188753 orbit
★ Alpha Centauri
★ Polaris
★ 51 Pegasi
References
1. http://cdsweb.u-strasbg.fr/ftp/cats/v/122/alias.dat
2. http://ad.usno.navy.mil/wds/dsl/SB8/sb8.html
3. http://joy.chara.gsu.edu/~nils/2000AJ....119.3084H.pdf
4. 'JPL': NASA Scientist Finds World With Triple Sunsets
5. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1978Obs....98..122B&db_key=AST&data_type=HTML&format=
6. http://www.nature.com/news/2005/050711/full/050711-6.html
7. http://www.ncac.torun.pl/~maciej/Planets/HD188753Ab.html
8. http://arxiv.org/abs/astro-ph/0702574
★ Griffin, R.F., ''The multiple star HD 188753 (ADS 13125)'', The Observatory, Vol. 97, pp. 15-18, 1977
★ Bowman, Lee (Jul. 14, 2005). "Planet with a view: Three suns shine in Cygnus". ''The Plain Dealer'', pg. A2.
External links
About
★ 'SIMBAD': HD 188753 -- Double or multiple star
★ 'Extrasolar Planets Encyclopaedia': HD 188753 A
★ 'Extrasolar Visions': HD 188753 A + HD 188753 B + HD 188753 C
★ 'WIKISKY.ORG': HD 188753
News
★ 'SPACE': Planet Discovered in 3-Star System
★ 'CNN': Scientists find planet with 3 suns
★ 'Slashdot': Tatooine-like Planet Discovered
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