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Juno Will Perform A Close Flyby of Europa

Juno Will Perform A Close Flyby of Europa

Because the Juno spacecraft makes a detailed method of Europa, it’s anticipated to offer invaluable science – and memorable imagery – for NASA’s upcoming Europa Clipper mission.

On Thursday, Sept. 29, at 2:36 am PDT (5:36 am EDT), NASA’s Juno spacecraft will come inside 222 miles (358 kilometers) of the floor of Jupiter’s ice-covered moon, Europa. The solar-powered spacecraft is predicted to acquire a number of the highest-resolution pictures ever taken of parts of Europa’s floor, in addition to gather invaluable knowledge on the moon’s inside, floor composition, and ionosphere, together with its interplay with Jupiter’s magnetosphere.

Such info may benefit future missions, together with the company’s Europa Clipper, which is ready to launch in 2024 to review the icy moon. “Europa is such an intriguing Jovian moon, it’s the focus of its personal future NASA mission,” stated Juno Principal Investigator Scott Bolton of the Southwest Analysis Institute in San Antonio. “We’re joyful to offer knowledge which will assist the Europa Clipper staff with mission planning, in addition to present new scientific insights into this icy world.”

With an equatorial diameter of 1,940 miles (3,100 kilometers), Europa is about 90% the dimensions of Earth’s Moon. Scientists suppose a salty ocean lies beneath a miles-thick ice shell, sparking questions on potential situations able to supporting life beneath Europa’s floor.

The shut flyby will modify Juno’s trajectory, decreasing the time it takes to orbit Jupiter from 43 to 38 days. It is going to be the closest a NASA spacecraft has approached Europa since Galileo got here inside 218 miles (351 kilometers) on Jan. 3, 2000. As well as, this flyby marks the second encounter with a Galilean moon throughout Juno’s prolonged mission. The mission explored Ganymede in June 2021 and plans to make shut approaches of Io in 2023 and 2024. Knowledge assortment will start an hour previous to closest method, when the spacecraft is 51,820 miles (83,397 kilometers) from Europa.

“The relative velocity between spacecraft and moon shall be 14.7 miles per second (23.6 kilometers per second), so we’re screaming by fairly quick,” stated John Bordi, Juno deputy mission supervisor at JPL. “All steps need to go like clockwork to efficiently purchase our deliberate knowledge, as a result of quickly after the flyby is full, the spacecraft must be reoriented for our upcoming shut method of Jupiter, which occurs solely 7 ½ hours later.”

The spacecraft’s full suite of devices and sensors shall be activated for the Europa encounter. Juno’s Jupiter Energetic-Particle Detector Instrument (JEDI) and its medium-gain (X-band) radio antenna will gather knowledge on Europa’s ionosphere. Its Waves, Jovian Auroral Distributions Experiment (JADE), and Magnetometer (MAG) experiments will measure plasma within the moon’s wake as Juno explores Europa’s interplay with Jupiter’s magnetosphere.

MAG and Waves may even seek for potential water plumes above Europa’s floor. “We now have the suitable gear to do the job, however to seize a plume would require a whole lot of luck,” stated Bolton. “We now have to be on the proper place at simply the suitable time, but when we’re so lucky, it is a dwelling run for positive.”

Inside and Out

Juno’s Microwave Radiometer (MWR) will peer into Europa’s water-ice crust, acquiring knowledge on its composition and temperature. That is the primary time such knowledge can have been collected to review the moon’s icy shell.

As well as, the mission expects to take 4 visible-light pictures of the moon with JunoCam (a public-engagement digicam) in the course of the flyby. The Juno science staff will evaluate them to photographs from earlier missions, on the lookout for modifications in Europa’s floor options which may have occurred over the previous twenty years. These visible-light pictures can have an anticipated decision higher than 0.6 miles (1 kilometer) per pixel.

Though Juno shall be in Europa’s shadow when closest to the moon, Jupiter’s ambiance will replicate sufficient daylight for Juno’s visible-light imagers to gather knowledge. Designed to take pictures of star fields and seek for shiny stars with recognized positions to assist Juno get its bearings, the mission’s star digicam (referred to as the Stellar Reference Unit) will take a high-resolution black-and-white picture of Europa’s floor. In the meantime, the Jovian Infrared Auroral Mapper (JIRAM) will try to gather infrared pictures of its floor.

Juno’s closeup views and knowledge from its MWR instrument will inform the Europa Clipper mission, which is able to carry out almost 50 flybys after it arrives at Europa in 2030. Europa Clipper will collect knowledge on the moon’s ambiance, floor, and inside – info that scientists will use to raised perceive Europa’s world subsurface ocean, the thickness of its ice crust, and potential plumes which may be venting subsurface water into area.

Extra Concerning the Mission

NASA’s Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Juno mission for the principal investigator, Scott J. Bolton, of the Southwest Analysis Institute in San Antonio. Juno is a part of NASA’s New Frontiers Program, which is managed at NASA’s Marshall Area Flight Middle in Huntsville, Alabama, for the company’s Science Mission Directorate in Washington. Lockheed Martin Area in Denver constructed and operates the spacecraft.

Extra details about Juno is offered at: and


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