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{{Infobox planet
| name = HD 187123 b
| discoverer = Butler, Marcy,
Vogt, Apps et al.
| discovery_site = California, United States
| discovered = 9 September 1998
| discovery_method = radial velocity
| apsis = astron
| semimajor = {{val|0.04213|0.00034}} AU
| eccentricity = {{val|0.0093|0.0046}}[1]
| period = {{val|3.0965886|0.0000043}}[1] d
| time_periastron = {{val|2454342.87|0.30}}[1]
| arg_peri = {{val|360|200}}[1]
| semi-amplitude = {{val|68.91|0.36}}[1]
| star = HD 187123
}}HD 187123 b is a typical "hot Jupiter" located approximately 150 light-years away in the constellation of Cygnus, orbiting the star HD 187123. It has a mass about half that of Jupiter and it orbits in a very tight, round orbit around the star every three days.The star has also been monitored for possible transits by the planet, but none was found. See alsoReferences1. ^1 2 3 4 5 {{cite journal | title=The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-period Planets | url=http://iopscience.iop.org/article/10.1088/0004-637X/800/1/22/meta | last1=Feng | first1=Y. Katherina | last2=Wright | first2=Jason T. | last3=Nelson | first3=Benjamin | last4=Wang | first4=Sharon X. | last5=Ford | first5=Eric B. | last6=Marcy | first6=Geoffrey W. | last7=Isaacson | first7=Howard | last8=Howard | first8=Andrew W. | displayauthors=1 | journal=The Astrophysical Journal | volume=800 | issue=1 | at=22 | year=2015 | arxiv=1501.00633 | bibcode=2015ApJ...800...22F | doi=10.1088/0004-637X/800/1/22 }}
2. ^1 {{cite journal | title=Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems | url=http://iopscience.iop.org/article/10.1088/0004-637X/693/2/1084 | last1=Wright | first1=J. T. | last2=Upadhyay | first2=S. | last3=Marcy | first3=G. W. | last4=Fischer | first4=D. A. | last5=Ford | first5=Eric B. | last6=Johnson | first6=John Asher | display-authors=1 | journal=The Astrophysical Journal | volume=693 | issue=2 | pages=1084–1099 | year=2009 | arxiv=0812.1582 | bibcode=2009ApJ...693.1084W | doi=10.1088/0004-637X/693/2/1084 }}
[1][2]
}}External links- {{cite web | url=http://exoplanet.eu/planet.php?p1=HD+187123&p2=b | title=Notes for planet HD 187123 b | work=The Extrasolar Planets Encyclopaedia | accessdate=2008-08-25}}
- {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+187123 | title=HD 187123 | work=Exoplanets | accessdate=2008-08-25}}
{{Sky|19|46|58.1130|+|34|25|10.288|156.28}}{{DEFAULTSORT:Hd 187123 B}}{{extrasolar-planet-stub}} 6 : Cygnus (constellation)|Exoplanets|Exoplanets discovered in 1998|Giant planets|Hot Jupiters|Exoplanets detected by radial velocity |