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| − | {{Starbox
| + | #REDIRECT[[Pi 3 Orionis]] |
| − | |name=Pi(3) Orionis
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| − | |image=
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| − | |image_size=
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| − | |caption=
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| − | |constellation=Orion
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| − | |right ascension=04h 49m 50.41s
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| − | |declination=+06° 57' 40.59"
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| − | |spectral type=F6 V
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| − | |distance=26.2 ly
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| − | |other designations=Pi3 Ori, 1 Ori, HR 1543*, Gl 178, Hip 22449, HD 30652, BD+06 762, SAO 112106, FK5 1134, LTT 11517.
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| − | }}
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| − | '''Pi(3) Orionis''' is a (possibly multiple) star system located about 26.2 light-years away from our Sun, Sol. It lies at the western edge of the constellation Orion, the Hunter. This star is a white-yellow main sequence dwarf star of spectral and luminosity type F6 V, with maybe 1.3 times Sol's mass, 1.3 times its diameter<ref>(Perrin and Karoji, 1987)</ref>, and three times of its luminosity. It may be anywhere from 20 to 151 percent as enriched as Sol with elements heavier than hydrogen ("metallicity"), based on its abundance of iron<ref>(Cayrel de Strobel et al, 1991, page 10)</ref>.
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| − | Pi(3) Orionis A is a New Suspected Variable designated NSV 1731. Star A has a probable optical companion<ref>(Abt and Levy, 1976, page 20)</ref> and may have a spectroscopic companion that speckle interferometry has not been able to resolve<ref>(Hartkopf and McAlister, 1984)</ref>.
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| − | The distance from star A where an Earth-type planet would be "comfortable" with liquid water is centered around 1.7 AU -- beyond the orbital distance of Mars in the Solar System. Astronomers are hoping to use NASA's Terrestrial Planet Finder (TPF) and the ESA's Darwin planned groups of observatories to search for a rocky inner planet in the so-called "habitable zone" (HZ) around Pi3 Orionis. As currently planned, the TPF will include two complementary observatory groups: a visible-light coronagraph to launch around 2014; and a "formation-flying" infrared interferometer to launch before 2020, while Darwin will launch a flotilla of three mid-infrared telescopes and a fourth communications hub beginning in 2015.
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| − | ''(Data from [http://www.solstation.com/ SolStation.com])''
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| − | ==Notes==
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| − | <references />
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| − | {{interstellar}}
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