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| Exoplanetary Scratchpad|
HD 189733 System Web Pages
HD 189733 System Artwork
HD 189733 System In the News
Very Hot Jupiter Discovered (Dec 2005)
The nearest transiting planet which has a smaller period than most known planets was discovered by the ELODIE metallicity-biased search. It is the second transiting planet discovered bright enough to expect detailed measurements of its temperature and atmosphere to be made. It was found to have an anamolously large radius of 1.26 RJ.
Bad Astronomy Forum Thread
Posteriori Transit Detections (Jan 2006)
Astronomers dug through archived images of HD 189744 and found several past transit events
Temperature Taken (Feb 2006)
Planet b's temperature was taken by Spitzer. This is the first time infrared light has been detected from an exoplanet. http://space.newscientist.com/article/dn8761--our-closest-exoplanet-has-its-temperature-taken.html http://www.spacedaily.com/reports/Spitzer_Takes_Temperature_of_Closest_Exoplanet.html
Parameters Refined (Apr 2006)
The radius (1.154 RJ) and other properties are refined, showing it does not have as anomalous radius as first thought. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2006ApJ...650.1160B&db_key=AST&data_type=HTML&format=&high=4545eb628e16452
Spin-Orbit Alignment Measured (2006)
Calculations suggest that inwards migration of Hot Jupiters generally preserves spin-orbit alignments http://www.journals.uchicago.edu/cgi-bin/resolve?id=doi:10.1086/510528&erFrom=5947546465627586021Guest
Diameter Directly Measured (Jan 2007)
Planet b becomes the first exoplanet to have its diameter measured through direct means. It is found to be larger than the measurements taken when it was first discovered and the ones taken in 2006 at 1.3 Jupiter Diameters.
Infrared Spectrum of Planet b Probed (Feb 2007)
Its atmosphere was probed along with HD 209458 b's, but water was surprisingly not detected in either planet. Clouds of Silicate could be preventing its detection though.
Escape State Hubble Observation Proposal
This is a proposal to use the HST to determine if and how much atmosphere of HD 189733 b is escaping the planet.
Surface Gravity Calculated (May 2007)
The sureface gravity was calculated for all transiting planets. HD 189733 b has one of the larger surface gravities, thus better able to hold onto its atmosphere than some other ones, though it is hotter than most.
Temperature Map Shows Heat Distributed Efficiently (May 2007)
A temperature map determined that its night and day side hemispheres had only slightly different temperatures, showing that its atmosphere was efficient at transporting heat.
HD 188753 b temperature map - Extrasolar Visions BBS Thread http://www.sciam.com/article.cfm?articleID=717C56A4-E7F2-99DF-3BF77FF1BF29E7D3&chanID=sa007 http://uanews.org/cgi-bin/WebObjects/UANews.woa/35/wa/SRStoryDetails?ArticleID=13872 http://news.nationalgeographic.com/news/2007/05/070509-planet-map.html http://www.upi.com/NewsTrack/Science/2007/05/09/nasa_creates_first_exoplanet_weather_map/ http://www.space.com/scienceastronomy/070509_planet_map.html
Water Positively Detected (Jul 2007)
http://www.timesonline.co.uk/tol/news/uk/science/article2062495.ece http://www.sciam.com/article.cfm?articleID=B66E323B-E7F2-99DF-36D284B02192381C&chanID=sa007 http://news.nationalgeographic.com/news/2007/07/070711-water-jupiter.html http://cbs2.com/local/local_story_192140205.html
No Rings or Moons Detected (Jul 2007)
Haze Detected, Sunset Visualized (Dec 2007)
http://cosmiclog.msnbc.msn.com/archive/2007/12/11/510640.aspx http://www.spacetelescope.org/news/html/heic0720.html http://www.skyandtelescope.com/news/12310496.html http://www.space.com/scienceastronomy/071211-hazy-exoplanet.html
Scattered Light Detected (Dec 2007)
First Exoplanet with Methane Detected (Feb 2008)
New Weather Model Developed (Oct 2008)
First Exoplanet with Carbon Dioxide Detected (Nov 2008)