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Exoplanet HD 80606b Infrared Light Curve
Ssc2009 02a

Credit: NASA/JPL-Caltech/G. Laughlin (UCD/Lick Observatory)

Chart • January 28th, 2009 • ssc2009-02a

ssc2009-02a

This figure charts 30 hours of observations taken by NASA's Spitzer Space Telescope of a strongly irradiated exoplanet (an planet orbiting a star beyond our own). Spitzer measured changes in the planet's heat, or infrared light.

The lower graph shows precise measurements of infrared light with a wavelength of 8 microns coming from the HD 80606 stellar system. The system consists of a sun-like star and a planetary companion on an extremely eccentric, comet-like orbit. The geometry of the planet-star encounter is shown in the upper part of the figure.

As the planet swung through its closest approach to the star, the Spitzer observations indicated that it experienced very rapid heating (as shown by the red curve). Just before close approach, the planet was eclipsed by the star as seen from Earth, allowing astronomers to determine the amount of energy coming from the planet in comparison to the amount coming from the star.

The observations were made in Nov. of 2007, using Spitzer's infrared array camera. They represent a significant first for astronomers, opening the door to studying changes in atmospheric conditions of planets far beyond our own solar system.

About the Object

Name
HD 80606b
Type
Planet > Type > Gas Giant
Planet > Special Cases > Transiting
Planet > Special Cases > Hot Jupiter
Distance
58 Light Years

Color Mapping

Band Wavelength Telescope
Infrared 8.0 ┬Ám Spitzer IRAC