Assertion: planet's star | /r/AtLocation | binocular field of view
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Source sentences:
text: The standard procedure for identifying an asteroid through binoculars - once its general location has been found from a detailed astronomical ephemeris - is to sketch the stars seen in the binocular field of view, then return a night or two later to the same region of sky and note which of the 'stars' has moved - this will be the asteroid in question.