HIP 65426 b is a gas giant exoplanet that orbits an A-type star. Its mass is 9 Jupiters, it takes 630.7 years to complete one orbit of its star, and is 92 AU from its star. Its discovery was announced in 2017. NASA's James Webb Space Telescope was used to directly image the planet in 2022.

The image, as seen through four different light filters, shows how Webb’s powerful infrared gaze can easily capture worlds beyond our solar system, pointing the way to future observations that will reveal more information than ever before about exoplanets.

Taking direct images of exoplanets is challenging because stars are so much brighter than planets. The HIP 65426 b planet is more than 10,000 times fainter than its host star in the near-infrared, and a few thousand times fainter in the mid-infrared.

In each filter image, the planet appears as a slightly differently shaped blob of light. That is because of the particulars of Webb’s optical system and how it translates light through the different optics.

“Obtaining this image felt like digging for space treasure,” said Aarynn Carter, a postdoctoral researcher at the University of California, Santa Cruz, who led the analysis of the images. “At first all I could see was light from the star, but with careful image processing I was able to remove that light and uncover the planet.”

PLANET TYPE
Gas Giant
DISCOVERY DATE
2017
MASS
9 Jupiters
PLANET RADIUS
1.5 x Jupiter
ORBITAL RADIUS
92.0 AU
ORBITAL PERIOD
630.7 years
ECCENTRICITY
0.0
DETECTION METHOD