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EXO WORLDS
Kepler spacecraft recovered and returned to the K2 Mission
by Staff Writers
Moffett Field CA (SPX) Apr 25, 2016


illustration only

The Kepler spacecraft has been recovered and, as of 8:30 a.m. PDT today, it is back on the job as the K2 mission searching for exoplanets - planets beyond our solar system.

The team began the process of returning the spacecraft to science late on Tuesday. The process involved a succession of steps over the course of the next two days. The pointing tables and science targets - instructions that tell the spacecraft where to look and at what - were reloaded and confirmed, onboard logs and counters were reset and a new command sequence was created, tested and uploaded to account for the late start of the campaign.

The spacecraft is now ready for science operations, officially starting K2's new gravitational microlensing campaign, known as Campaign 9 or C9.

During NASA's Deep Space Network (DSN) contact with the spacecraft yesterday, flight operations engineers at Ball Aerospace and the Laboratory for Atmospheric and Space Physics (LASP) at the University of Colorado, both located in Boulder, turned the spacecraft to point the telescope towards the center of the Milky Way galaxy to start collecting data for C9.

The K2 microlensing team and the ground-based observatories collaborating on C9's global experiment in exoplanet observation are searching through the collected data from the ground telescopes for possible events suitable for observations on larger telescopes, such as the 10-meter telescopes at the W. M. Keck Observatory atop Maunakea in Hawaii.

During the three-day campaign break, beginning on May 24, data accumulated to that point will be downlinked from the spacecraft to Earth. Shortly thereafter, the scientists will have their first chance to see K2's view of the same events seen on the ground.

The C9 observing period will conclude on July 1, when the galactic center is no longer in view from the vantage point of the spacecraft. K2 will then begin Campaign 10, which will proceed to investigate an entirely new set of interesting astrophysical targets.

Using the DSN, the team will check in on the spacecraft throughout the weekend to ensure it remains stable and continues its task. To track the contacts with Kepler, tune-in to the DSN Now website [http://eyes.nasa.gov/dsn/dsn.html]. Contacts with the smaller antennas will merely verify that the spacecraft has not gone to Safe or Emergency Mode, while contacts with the larger antennas - indicated as 63, 14 and 43 on the DSN Now - will provide a higher transfer rate to receive health data from the spacecraft.

The cause of the anomaly, first reported on April 8, remains under investigation. The nature of the problem has indications of a transient event, which triggered a barrage of false alarms that eventually overwhelmed the system, placing Kepler in Emergency Mode. Power-cycling the onboard computers and subsystems appears to have cleared the problem. We've returned to science data collection while the investigation proceeds.

The Kepler and K2 missions have been a rewarding job for everyone involved, but there's a special satisfaction to responding well to an emergency like this. The recovery and spacecraft teams at Ball, LASP and NASA's Ames Research Center, had to rely on their own talents and abilities to recover the spacecraft rather than external experts in the short time they had. It is extremely satisfying to see that the challenge was successfully met, and that the team performed in the best traditions of NASA.


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Related Links
Kepler at NASA
Lands Beyond Beyond - extra solar planets - news and science
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In 2011, astronomers announced that our galaxy is likely teeming with free-floating planets. In fact, these lonely worlds, which sit quietly in the darkness of space without any companion planets or even a host sun, might outnumber stars in our Milky Way galaxy. The surprising discovery begged the question: Where did these objects come from? Are they planets that were ejected from solar systems, ... read more


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