> This required placing the probe into "hibernation" or safe mode to prolong its life beyond the original 4.5-year design. JAXA expressed some confidence in keeping the probe operational, pointing to reduced battery wear, since the probe was then orbiting the Sun instead of its intended Venusian orbit
>At a press conference on 10 December, officials reported that Akatsuki's engines fired for less than three minutes, far short of what was required to enter into Venus orbit
>Three peri-Venus orbital maneuvers were executed on 1 November,[11] 10 and 21 November 2011 using the RCS thrusters. A total delta-V of 243.8 m/s was imparted to the spacecraft. Because the RCS thrusters' specific impulse is low compared to the specific impulse of the OME, the previously planned insertion into low Venusian orbit became impossible. Instead, the new plan was to place the probe in a highly elliptical orbit with an apoapsis of a hundred thousand kilometers and a periapsis of a few thousand kilometers from Venus.
[0]: https://en.wikipedia.org/wiki/Akatsuki_(spacecraft)#Orbit_in...