VB 10b: Difference between revisions
Content deleted Content added
Where's the radius information from? How do you get radius from astrometry? |
SevenSpheres (talk | contribs) category fix |
||
| (27 intermediate revisions by 15 users not shown) | |||
| Line 1: | Line 1: | ||
#REDIRECT [[VB 10#Claims of a planetary system]] |
|||
{{Planetbox begin |
|||
| name = VB 10b |
|||
}} |
|||
{{Planetbox image |
|||
| image = 352344main A-VB10b art-516.jpg |
|||
| caption = An artist's impression of VB 10b<br>showing the relative size of its parent star. |
|||
}} |
|||
{{Planetbox star |
|||
| star = [[VB 10]] |
|||
| constell = [[Aquila (constellation)|Aquila]] |
|||
| RA = {{RA|19|16|57.62}} |
|||
| DEC = {{DEC|+05|09|02.2}} |
|||
| app_mag = 17.30 |
|||
| dist_ly = 19.85 |
|||
| dist_pc = 6.09 |
|||
| class = M8V |
|||
}} |
|||
{{Planetbox orbit |
|||
| semimajor = 0.360 ({{±|0.016|0.006}}) |
|||
| semimajor_mas = 59.1 |
|||
| periastron = |
|||
| apastron = |
|||
| eccentricity = <0.98 |
|||
| inclination = 96.9 ({{±|7.4|1.8}}) |
|||
| period = 271.56 ({{±|6.9|3}}) |
|||
| arg_peri = 38.7 ({{±|4.8|3.3}}) |
|||
| t_peri = |
|||
| semi-amp = |
|||
}} |
|||
{{Planetbox character |
|||
| mass = 6.4 ({{±|2.6|3.1}}) |
|||
| radius = 0.99{{fact|date=June 2009}} |
|||
| temperature = |
|||
}} |
|||
{{Planetbox discovery |
|||
| discovery_date = May 2009 |
|||
| discoverers = Pravdo and Shaklan of [[JPL]] |
|||
| discovery_method = [[Methods_of_detecting_extrasolar_planets#Astrometry|Astrometry]] |
|||
| discovery_site = [[Pasadena, California]] |
|||
| discovery_status = Announced (Preprint) |
|||
}} |
|||
{{Planetbox catalog |
|||
| names = Gliese 752 Bb |
|||
}} |
|||
{{Planetbox reference |
|||
| star = VB+10 |
|||
| planet = b |
|||
}} |
|||
{{Planetbox end}} |
|||
| ⚫ | |||
In May of 2009 astronomers from [[NASA|NASA's]] [[Jet Propulsion Laboratory]], [[Pasadena, California]] announced the [[Methods_of_detecting_extrasolar_planets#Astrometry|astrometric discovery]] of a planet, '''VB 10b''', using the {{convert|200|in|m|abbr=on}} [[Hale telescope]] at the [[Palomar Observatory]]. If confirmed, the [[extrasolar planet]] will be the first discovered using this method.<ref name="disc">{{cite journal |
|||
| title = An Ultracool Star's Candidate Planet |
|||
| url = http://steps.jpl.nasa.gov/links/docs/pravdoshaklan09vb10b.pdf |
|||
| year = 2009 |
|||
| journal = Submitted to the [[Astrophysical Journal]] |
|||
| last1 = Pravdo ''et al.'' |
|||
| accessdate = 2009-05-30}}[http://xxx.lanl.gov/abs/0906.0544 arXiv:0906.0544 absrtact]</ref><ref name="announce">{{cite web |
|||
| title=Planet-Hunting Method Succeeds at Last |
|||
| url=http://www.nasa.gov/topics/universe/features/exoplanet-20090528.html |
|||
| work=NASA NEWS, NEWS RELEASE: 2009-090 |
|||
| accessdate=2009-05-28}}</ref> |
|||
'''VB 10b''' is reported to orbit the the very small [[red dwarf]] star ''[[VB 10]]'' about 20 [[light years]] away in the [[constellation]] of [[Aquila (constellation)|Aquila]]. This planetary object is reported to be a [[gas giant]] about the size of [[Jupiter]] although it is reported to have approximately six times the mass. This planetary system is also unique in the ratio of the mass of the planet to the mass of the star. Up to 10% of the mass of this entire star-planet system could be in the planet. This combination of a very small star with a very massive planet makes the star's ''wobble'' more apparent according to the discovery report.<ref name="disc"/> |
|||
==Past claims based on astrometry== |
|||
{{main|Methods of detecting extrasolar planets#Astrometry|l1=Astrometry as an extrasolar planet detection method}} |
|||
VB 10b is not the first extrasolar planet claimed to be found by [[astrometry]]. Many claims of ''unseen planetary companions'' affecting the perceived motions of nearby stars have been made since the 18th century, beginning with [[William Herschel|Herschel]] himself. Since the 1960s [[Peter Van de Kamp]] claimed a planetary system was orbiting ''[[Barnard's Star]]''. In 1996 [[George Gatewood]] made a sensational claim of planets orbiting the nearby star ''[[Lalande 21185]]''.<ref>{{cite news|title=Data Seem to Show a Solar System Nearly in the Neighborhood|publisher=[[The New York Times]]|author=John Wilford|date=1996-06-12|accessdate=2009-05-29|page=1|url=http://www.nytimes.com/1996/06/12/us/data-seem-to-show-a-solar-system-nearly-in-the-neighborhood.html}}</ref> Subsequent analysis and further observations have been unable confirm any of these past claims which are now considered discredited. Because of this poor historical record, any claim of [[extrasolar planet]] discovery based on [[astrometry]] is met with skepticism.<ref name="sky">{{cite web |
|||
| title=Astronomers Pioneer New Method for Finding Exoplanets |
|||
| url=http://www.skyandtelescope.com/news/46462532.html |
|||
| publisher=[[Sky and Telescope]] |
|||
| accessdate=2009-05-29 |
|||
}}</ref> |
|||
==References== |
|||
{{reflist}} |
|||
[[Category:Aquila constellation]] |
|||
| ⚫ | |||
[[Category:Exoplanets discovered in 2009]] |
|||
[[Category:Gas giant planets]] |
|||
{{Sky|19|16|58|+|05|09|02|19.85}} |
|||
{{Extrasolar-planet-stub}} |
|||
[[fr:VB 10b]] |
|||
[[fi:VB 10b]] |
|||
[[it:VB 10b]] |
|||
Latest revision as of 17:18, 17 January 2021
Redirect to: