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- Q5178323 subject Q15076396.
- Q5178323 subject Q6791927.
- Q5178323 subject Q7009250.
- Q5178323 subject Q8216920.
- Q5178323 subject Q8293947.
- Q5178323 abstract "Eta Telescopii (η Tel, η Telescopii), also known as HD 181296 or HR 7329, is a star in the southern constellation of Telescopium. This is a white-hued A-type main sequence star with an apparent visual magnitude of +5.03. It is approximately 155 light years from Earth and is a member of the Beta Pictoris Moving Group of stars that share a common motion through space. It is moving through the Galaxy at a speed of 23.7 km/s relative to the Sun.In 1998, imaging with the Hubble Space Telescope revealed a 12th magnitude object around 4" distant from Eta Telescopii, and calculated to be a brown dwarf of spectral type M7V or M8V with a surface temperature of around 2600 K. It is located around 192 AU distant from the primary star, and weighs between 20 and 50 Jupiter masses.This star has 2.9 times the mass of the Sun and is radiating around 22 times the Sun's luminosity from its outer atmosphere at an effective temperature of 9,506 K. The age of the star is only about 12 million years. It is emitting an excess of infrared radiation that suggests the presence of a circumstellar disk of dust at an orbital radius of 24 AU, and an unresolved asteroid belt at 4 AU from the host star. Subsequent imaging showed there were no objects of 20 Jupiter masses or greater between the disk and the brown dwarf, leading the researchers Neuh¨auser and colleagues to postulate that the brown dwarf had an eccentric orbit - if 200 AU were its furthest distance from the primary, then it could come as close as 71 AU with an average distance of 136 AU.Eta Telescopii is in fact a triple star system; further away, separated by 7', is HD 181327, a yellow-white main sequence star of spectral type F6V and apparent magnitude 7.0, which has its own debris disk. This disk has a sharply-defined inner edge at 31 AU, indicating a likely planet between 19 and 31 AU from the star.".
- Q5178323 wikiPageWikiLink Q1014842.
- Q5178323 wikiPageWikiLink Q10546.
- Q5178323 wikiPageWikiLink Q111130.
- Q5178323 wikiPageWikiLink Q124313.
- Q5178323 wikiPageWikiLink Q1396651.
- Q5178323 wikiPageWikiLink Q15076396.
- Q5178323 wikiPageWikiLink Q1811.
- Q5178323 wikiPageWikiLink Q2.
- Q5178323 wikiPageWikiLink Q2513.
- Q5178323 wikiPageWikiLink Q2703.
- Q5178323 wikiPageWikiLink Q471805.
- Q5178323 wikiPageWikiLink Q523.
- Q5178323 wikiPageWikiLink Q531.
- Q5178323 wikiPageWikiLink Q555846.
- Q5178323 wikiPageWikiLink Q6791927.
- Q5178323 wikiPageWikiLink Q7009250.
- Q5178323 wikiPageWikiLink Q8216920.
- Q5178323 wikiPageWikiLink Q8293947.
- Q5178323 wikiPageWikiLink Q850950.
- Q5178323 wikiPageWikiLink Q854050.
- Q5178323 wikiPageWikiLink Q8928.
- Q5178323 comment "Eta Telescopii (η Tel, η Telescopii), also known as HD 181296 or HR 7329, is a star in the southern constellation of Telescopium. This is a white-hued A-type main sequence star with an apparent visual magnitude of +5.03. It is approximately 155 light years from Earth and is a member of the Beta Pictoris Moving Group of stars that share a common motion through space.".
- Q5178323 label "Eta Telescopii".