HD 187123

Starbox short
name=HD 187123
epoch=2000
constell=Cygnus
ra=RA|19|46|58.1130
dec=DEC|+34|25|10.288
appmag_v=7.89
dist_ly=156.28
dist_pc=47.92
spectral=G5V
names=BD+34°3708, HIP 97336, LTT 15779, SAO 68845

HD 187123 is an 8th magnitude G-type main sequence star located approximately 156 light-years away in the constellation of Cygnus. Like our Sun, it is a yellow dwarf (spectral type G5V). Being at a distance of about 160 light-years it is not visible to the unaided eye. However, it should be easy target with binoculars or small telescope.

Planetary system

In 1998 the California and Carnegie Planet Search team, after following a suggestion by Kevin Apps, a Briton who at the time was an undergraduate student [ [http://news.bbc.co.uk/1/hi/sci/tech/179909.stm BBC News | Sci/Tech | British student shows Nasa new planet] - Friday, September 25, 1998] found a possible planet orbiting the star. [cite journal | url=http://adsabs.harvard.edu/abs/1998PASP..110.1389B | author="Butler et al" | title=A Planet with a 3.1 Day Period around a Solar Twin | journal=Publications of the Astronomical Society of the Pacific | volume=110 |year=1998 | pages=1389–1393| doi=10.1086/316287 ] There are also indications of another, more distant body orbiting the star; and the claim was published in 2006. [cite journal | url=http://adsabs.harvard.edu/abs/2006astro.ph.11658W | author=Wright "et al" | title=Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars | journal=ARXIV | volume=656 | issue=2 | pages= | doi= ]

PlanetboxOrbit
exoplanet = b
mass = >0.52
period = 3.097
semimajor = 0.0426
eccentricity = 0.035 ± 0.015PlanetboxOrbit
exoplanet = c
mass = >1.95
period = 3700 ± 530
semimajor = 4.80
eccentricity = 0.249 ± 0.030

See also

* List of stars with confirmed extrasolar planets

References

External links

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