Andy's Wiki
Exoplanetary Scratchpad

[SysBP Img]

A binary star in Velpulca (the "little fox") consisting of an Orange Dwarf star A and a Red Dwarf B (discovered shortly after planet Ab found and orbiting perpendicular to that planet's orbit and later detected in x-rays) orbiting 216 AU away. Planet Ab (the first nearby Very Hot Jupiter, originally thought to be inflated, is 13% larger and more massive than Jupiter) is the nearest transiting Hot Jupiter (62.9 ly). This is the first exoplanet to have its temperature mapped and was nicknamed Bull's Eye for its hot spot that is significantly offset from the starward pole. 5 years later, it later became the first world to have its thermal emissions mapped in both longtitude and latitude, confirming the hot spot was near the equator. Fast winds are thought to make the temperature of the eternal day and night sides nearly identical, which were later measured to be 2km/s when the planet became the first to have its wind and weather patterns mapped. It is also the first exoplanet for which scattered light in the upper atmosphere has been detected and the second exoplanet with water detected and first with Methane and then Carbon Dioxide detected. It later was the first exoplanet whose gasses were detected from Earth-based telescopes. It was also found to spin up its star and magnetically interact with it, causing stellar storms. Massive X-class solar flares blast off much of the planet's atmosphere and may render it undetectable. Hubble found that its atmosphere was a uniform blue haze. Blue was detected by determining which wavelengths were blocked during a transit. It was also found to rain molten glass, sideways, with 7000 km/hr winds and 1000C. It became the first exoplanet whose transit was detected in X-Rays, which revealed it had a very large extended outer atmosphere, which is losing material rapidly. The star is much more magnetically active for its age, possibly due to the planet's presence. There is speculation that it could have large planet-wide auroras. It's already-known mass was measured using an atmospheric pressure method to test its viability. By studying sodium spectra, it was determined that it gets hotter with altitude.

My Thoughts[]

Ha, I see that this is in the "little fox" constellation. With it's nickname being "Bull's Eye", I couldn't help but thing of the cartoon fox Robin Hood. Of course, this is a prime naming candidate.

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

Red Dwarf Star B Discovered (2006)[]

(no news articles for this event)

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.

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.

Spin-Orbit Alignment Measured (2006)[]

Calculations suggest that inwards migration of Hot Jupiters generally preserves spin-orbit alignments

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.,0,4084177.story?coll=orl-news-headlines-space

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

Water Positively Detected (Jul 2007)[];_ylt=AlAhtvDHls4UHbx1zMj_V4vlmlUA

No Rings or Moons Detected (Jul 2007)[]

Haze Detected, Sunset Visualized (Dec 2007)[]

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)[]

Exoplanetary Gas Spotted From Earth-Based Telescope For First Time (Feb 2010)[]

Magnetic Explanation for Inflated Hot Jupiters (Feb 2010)[]

Global Storm (Sep 2010)[]

Planet Spins its Star (Jan 2011)[]

Planet Engulfed in Uniform Blue Haze (Jul 2011)[]

Thermal Map of Longtitude and Latitude Created (Feb 2012)[]

Planet Hit With Massive Solar Flares (Jun 2012)[]

Found to be Blue and Rains Molten Glass (Jul 2013)[]

X-Ray Transit (Aug 2013)[]

Used as a Test for Atmospheric Mass Determination Technique (Dec 2013)[]

More Precise Measurements Still Yield Less Water Than Expected (2014)[]

See also HD 189733 System, HD 209458 System, WASP-12 System

Stormy at High Altitudes (2015)[]

Winds Measured and Mapped (Nov 2015)[]

Hubble Observes 10 Hot Jupiters (Dec 2015)[]

See WASP-12 System, WASP-6 System, WASP-31 System, WASP-33 System, HD 189733 System, HAT-P-12 System, WASP-17 System, WASP-19 System, HAT-P-1 System, HD 209458 System

See Also[]