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Astronomy and Cosmology
Astronomy and Astrophysics
How Can Planetary Movements Affect Time and Illumination on an Inhabited Planet?
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[QUOTE="snorkack, post: 6823975, member: 436348"] A probably septuple star system which is a naked eye, "northern" sky star with a Greek letter... but not α ν Scorpii. Declination -19°27´. Magnitude rarely quoted but brighter than +4. Telescope will resolve it into 4 components, designated with Latin majuscles: A, B, C or D A is +4,38... total, you´ll see! AB separation is lately 1,3´´. B is +5,4. AB-CD separation is 41´´, so not separated by eye. CD are separated by about 2,4´´. C is +6,3, D is +7,4, also total. Now two of the 4 visible components are themselves known multiples. And the invisible components are designated by Latin minuscles, following the visible component majuscle when applicable, as is the case in ν Scorpii ABCD. ν Scorpi A is a known triple. Aab-Ac separation is about 63 m´´ (period 5,7 years), and Ac magnitude estimated at +6,6. Aa-Ab separation is about 1 m´´ (period 5,5 d), and Ab magnitude about +6,9. ν Scorpi D is a suspect double... but its orbit and magnitudes do not seem to be known. The very uncertainty about D calls the whole multiplicity of ν Scorpi into question. You have 3 more assumed single components at safe distance from others - Ac, B and C. Resolve any of them, and you have your octonary star. Oh and remember: Latin minuscles designate any invisible components, whether stars or planets. You could easily have both in the same system. Does the lettering then take account of which are stars, which planets? [/QUOTE]
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Astronomy and Cosmology
Astronomy and Astrophysics
How Can Planetary Movements Affect Time and Illumination on an Inhabited Planet?
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