New Worlds Observer: Orbit and Sky Coverage

Details New Worlds Observer: Orbit and Sky Coverage New Worlds Observer: Orbit and Sky Coverage

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20916911l&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #169.11; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

New Worlds Observer is an external occulter concept designed to detect optical wavelength light from Earth-like planets around solar neighborhood stars. NWO uses a multi-petal external occulter situated tens of thousands of kilometers away from a telescope to suppress the central starlight by a factor of greater than 1010 to allow direct exo-planet observation. Due to the large separation, the occulter needs to move large distances off orbit. We discuss possible orbits for NWO which achieves 4π steradian sky coverage during mission lifetime. In particular, we focus on an L2 Lissajous orbit which achieves full coverage every year, with an instantaneous 1.6π steradian viewing zone. We discuss the fuel requirements of slewing, alignment, and stationkeeping.

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