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・ 47 mm APX anti-tank gun
・ 47 mm Model 1931 anti-tank gun
・ 47 morto che parla
・ 47 Natkal
・ 47 Ophiuchi
・ 47 Palace Court
・ 47 Plaza Street West
・ 47 Rojulu
・ 47 Ronin (1994 film)
・ 47 Ronin (2013 film)
・ 47 Squadron
・ 47 Street
・ 47 Tauri
・ 47 to 84
・ 47 Tucanae
47 Ursae Majoris
・ 47 Ursae Majoris b
・ 47 Ursae Majoris c
・ 47 Ursae Majoris d
・ 47-foot Motor Lifeboat
・ 470
・ 470 (dinghy)
・ 470 BC
・ 470 European Championships
・ 470 Express Pierrefonds
・ 470 Kilia
・ 470 World Championships
・ 4700th Air Defense Group
・ 4702d Defense Wing
・ 4703 Kagoshima


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47 Ursae Majoris : ウィキペディア英語版
47 Ursae Majoris


47 Ursae Majoris (often abbreviated 47 UMa) is a solar analog, yellow dwarf star approximately 46 light-years〔 away from Earth in the constellation of Ursa Major. , it has been confirmed that three Jupiter-like extrasolar planets orbit the star. Because of this, 47 Ursae Majoris was listed as one of top 100 target stars for NASA's former Terrestrial Planet Finder mission.〔

== Distance and visibility ==
47 Ursae Majoris is located fairly close to the Solar System: according to astrometric measurements made by the Hipparcos astrometry satellite, the star exhibits a parallax of 71.11 milliarcseconds, corresponding to a distance of 45.913 light-years.〔 With an apparent magnitude of +5.03, it is visible to the naked eye.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「47 Ursae Majoris」の詳細全文を読む



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