Monday, April 4

Japanese X-ray observatory seen spinning out of control

Pieces of Japan's Hitomi satellite are seen tumbling through the Orion constellation Sunday night. (credit: William Keel)

The prognosis wasn't good last week when the Japanese Space Agency, JAXA, lost communication with its new Hitomi X-ray astronomy satellite. However, there was some hope a few days later when the space agency reestablished intermittent contact with the spacecraft orbiting some 580km above the Earth.

Astronomers have since been observing the satellite, originally known as Astro-H, as it has orbited around the Earth. The photos with this story, captured by University of Alabama astronomer William Keel on Sunday evening, appear to show different pieces of the spacecraft catching the Sun as they slowly rotate. The brightest moments are probably caused by solar panels spinning into view. The pattern of brighter then fainter light suggests at least two large pieces, with different periods, are tumbling out of control.

One astronomer who has been tracking Hitomi closely, Jonathan McDowell at the Harvard-Smithsonian Center for Astrophysics, tweeted on Sunday evening, "Sadly, I now believe that the radio signals were the dying sighs of a fatally wounded Astro-H."

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