By mid-August 2006, AKARI finished around 50 per cent of the all-sky survey. By early November 2006, first (phase-1) all-sky survey finished. Second (phase-2) all-sky survey started on 10 November 2006. Due to the malfunction of
Sun sensor after the launch, ejection of telescope
aperture lid was delayed, resulting in the coolant lifespan estimate being shortened to about 500 days from launch. However, after JAXA estimated the remaining helium during early March 2007, observation time was extended at least until 9 September. On 11 July 2007, JAXA informed that 90 per cent of the sky was scanned twice. Also around 3,500 selected targets have been observed so far. On 26 August 2007, liquid helium coolant depleted, which means the completion of far- and mid-infrared observation. More than 96 per cent of the sky was scanned and more than 5,000 pointed observations were done. British and Japanese project team members were awarded a
Daiwa Adrian Prize in 2004, by the
Daiwa Anglo-Japanese Foundation in recognition of their collaboration. During December 2007, JAXA performed orbit correction manoeuvres to bring AKARI back into its ideal orbit. This was necessary because the boiled-off helium led to an increase in altitude. If this had continued, the energy supply would have been cut off.
2008–2010 A limited-observation 'warm' programme continued with just NIR.
End of mission In May 2011, AKARI suffered a major electrical failure and the batteries could not take full charge from the solar panels. As a result, its science instruments were rendered inoperable when the satellite was in the Earth's shadow. The satellite reentered the atmosphere on 11 April 2023 at 04:44 UTC. ==Results==