Cygnus fires engine to test reboost of ISS


Genesis cover

On Christmas Eve 1968 three Americans became the first humans to visit another world. What they did to celebrate was unexpected and profound, and will be remembered throughout all human history. Genesis: the Story of Apollo 8, Robert Zimmerman's classic history of humanity's first journey to another world, tells that story, and it is now available as both an ebook and an audiobook, both with a foreword by Valerie Anders and a new introduction by Robert Zimmerman.

 
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The Cygnus freighter presently berthed to ISS yesterday did a successful test engine firing to see if it could raise the orbit of ISS.

The cargo resupply vehicle provided a reboost to the Station at 4:25 pm Eastern, with a short 50 second burn of its main engine on the aft of the vehicle, raising the Station’s altitude by 295 feet. This test will pave the way for future, longer burns, removing some of the orbital stationkeeping strain from the Russian assets.

This was the first time since the retirement of the Space Shuttle fleet in July 2011, a US spacecraft had performed a reboost of the ISS.

Northrop Grumman proposed the idea, considering it a way to enhance the value of Cygnus for future NASA contracts. It also appears that NASA is looking to see if the Dragon and Starliner capsule can do this. If so, it will free the U.S. from another dependency it presently has with Russia, who today has the only approved ability to raise the station’s orbit, using Progress and Soyuz capsules and sometimes the engine on its Zvezda module.

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