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- Q10338099 subject Q6791927.
- Q10338099 subject Q7215990.
- Q10338099 subject Q8216920.
- Q10338099 subject Q8293947.
- Q10338099 abstract "Nu Horologii (ν Horologii, ν Hor) is the Bayer designation for a single star in the southern constellation of Horologium. It was catalogued by the Dutch explorer Frederick de Houtman in 1603. With an apparent visual magnitude of 5.3, this star can be seen with the naked eye from the southern hemisphere. (According to the Bortle scale, it can be seen at night from bright suburban skies.) Based upon parallax measurements made by the Hipparcos spacecraft, Nu Horologii lies at a distance of about 165 light years from the Earth.The stellar classification of A2 V indicates that it is an A-type main sequence star that is generating energy through thermonuclear fusion of hydrogen into helium at its core. Nu Horologii is larger and hotter than the Sun, with 190% of the Sun's mass, 188% of the radius of the Sun, and it shines with 16.7 times the solar luminosity. This is a young star with an estimated age of 540 million years, and it is spinning rapidly with a projected rotational velocity of 144 km/s along the equator. The effective temperature of the photosphere is 8,308 K, giving it the white-hued glow of an A-type star.No orbiting companions down to the mass of a brown dwarf have been discovered within a radius of 150 AU of Nu Horologii. However, it is emitting an infrared excess that suggests it is being orbited by a debris disk of dust particles. The mean temperature of this disk is 56 K and it appears to have two components: an inner disk is orbiting at a distance of 7013143613955872000♠96+9−37 AU, while an outer disk lies 7013613351269870000♠410+24−96 AU from the star. The estimated mass of the disks is 6997130000000000000♠(1.3±0.7)×10−3 times the mass of the Earth. The disks may be viewed edge on, which limits the amount of detail that can be discerned.Based upon their respective motions through space, ν Horologii had a close encounter with the star Alpha Fornacis some 351,200 years ago. The two stars came within 7015249939884098842♠0.081+0.6250−0.0488 pc of each other; close enough to disrupt their respective (hypothetical) Oort clouds. Potentially, the interaction may have produced asymmetries in the Nu Horologii debris disk, and could cause comet showers that increase the dust content. However, it is unlikely that the encounter was the cause of the disk itself.".
- Q10338099 thumbnail Horologium_IAU.svg?width=300.
- Q10338099 wikiPageWikiLink Q101600.
- Q10338099 wikiPageWikiLink Q105616.
- Q10338099 wikiPageWikiLink Q10574.
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- Q10338099 wikiPageWikiLink Q179600.
- Q10338099 wikiPageWikiLink Q180892.
- Q10338099 wikiPageWikiLink Q1811.
- Q10338099 wikiPageWikiLink Q2.
- Q10338099 wikiPageWikiLink Q2143996.
- Q10338099 wikiPageWikiLink Q257948.
- Q10338099 wikiPageWikiLink Q2722595.
- Q10338099 wikiPageWikiLink Q3559.
- Q10338099 wikiPageWikiLink Q40864.
- Q10338099 wikiPageWikiLink Q471805.
- Q10338099 wikiPageWikiLink Q48440.
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- Q10338099 wikiPageWikiLink Q531.
- Q10338099 wikiPageWikiLink Q555846.
- Q10338099 wikiPageWikiLink Q6372.
- Q10338099 wikiPageWikiLink Q6464.
- Q10338099 wikiPageWikiLink Q6791927.
- Q10338099 wikiPageWikiLink Q7215990.
- Q10338099 wikiPageWikiLink Q7783221.
- Q10338099 wikiPageWikiLink Q8216920.
- Q10338099 wikiPageWikiLink Q8293947.
- Q10338099 wikiPageWikiLink Q843877.
- Q10338099 wikiPageWikiLink Q845735.
- Q10338099 wikiPageWikiLink Q854050.
- Q10338099 wikiPageWikiLink Q8928.
- Q10338099 wikiPageWikiLink Q906561.
- Q10338099 wikiPageWikiLink Q984158.
- Q10338099 type Place.
- Q10338099 type CelestialBody.
- Q10338099 type Location.
- Q10338099 type Place.
- Q10338099 type Star.
- Q10338099 type Thing.
- Q10338099 comment "Nu Horologii (ν Horologii, ν Hor) is the Bayer designation for a single star in the southern constellation of Horologium. It was catalogued by the Dutch explorer Frederick de Houtman in 1603. With an apparent visual magnitude of 5.3, this star can be seen with the naked eye from the southern hemisphere.".
- Q10338099 label "Nu Horologii".
- Q10338099 depiction Horologium_IAU.svg.
- Q10338099 name "ν Horologii".