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BepiColombo's first routine firing in space
by Staff Writers
Paris (ESA) Dec 19, 2018

BepiColombo's maximum planned thrust level for the entire journey is 250 mN, with two thrusters each firing at 125mN. This is equivalent to 250 ants pulling the 4 tonne BepiColombo spacecraft all the way to the innermost planet of the Solar System!

On Monday this week, BepiColombo began its very first routine electric propulsion firing.

After meticulous testing of the spacecraft's four high-tech ion thrusters, the mission team have now fired up the spacecraft for its first thruster burn 'arc'.

Travelling nine billion kilometers in total, BepiColombo will make nine flybys at Earth, Venus and Mercury, looping around the Sun 18 times.

To do this, the ESA/JAXA mission will be steered by 22 thruster burn arcs, each providing the same acceleration from less fuel compared to traditional, high-energy chemical burns that last for minutes or hours.

This first arc will last two months, during which BepiColombo's electric blue 'jet packs' will steer the explorer on its interplanetary trajectory and optimise its orbit, ahead of its swing by of Earth in April 2020.

At 09:35 CET, before the thrusters began firing, BepiColombo was 'slewed' into the correct position. As its orientation shifted, the spacecraft's high-gain antenna swivelled to maintain communication with ground stations on Earth, captured in this gif taken by the monitoring camera #3.

Next, BepiColombo's solar arrays were tilted to fully face the Sun, as full power is needed to power the ion thrusters.

At about 13:45 CET, BepiColombo began to fire. The team watched with concentration and relief as graphs showed the spacecraft was gaining momentum, as two of its thrusters went from the initial thrust level of 75 millinewtons (mN) up to 108 mN each.

BepiColombo's maximum planned thrust level for the entire journey is 250 mN, with two thrusters each firing at 125mN. This is equivalent to 250 ants pulling the 4 tonne BepiColombo spacecraft all the way to the innermost planet of the Solar System!


Related Links
BepiColombo at ESA
News Flash at Mercury
Mars News and Information at MarsDaily.com
Lunar Dreams and more


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MERCURY RISING
BepiColombo now firing on all cylinders
Paris (ESA) Dec 06, 2018
BepiColombo, the joint ESA/JAXA spacecraft on a mission to Mercury, is now firing its thrusters for the first time in flight. On Sunday, BepiColombo carried out the first successful manoeuver using two of its four electric propulsion thrusters. After more than a week of testing which saw each thruster individually and meticulously put through its paces, the intrepid explorer is now one step closer to reaching the innermost planet of the Solar System. BepiColombo left Earth on 20 October 2018 ... read more

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