astrometric

Examples

• All

• The photometric monitoring of so many stars would also measure their long-term motions to better than about 0.001 seconds, making the mission an astrometric hunt for planets as well.

  Academic text (1996)

• The astrometric measurements allowed astronomers to track the movement of distant planets.

• In the astrometric method, they look for the slight periodic motion of the star in the sky.

  Academic text (1996)

• According to our astrometric readings, the year is 2063.

  Fiction book (1994)

• His idea for an astrometric spacecraft took shape gradually in the form of the HIPPARCOS satellite, which was launched by the European Space Agency in 1989.

  Academic text (2005)

• Lacroute quickly understood the importance of artificial satellites and the gain in precision that could be obtained from astrometric measurements collected outside Earth's atmosphere.

  Academic text (2005)

• The successive German directors conducted various astrometric surveys, including precise determinations of positions of nebulae, double stars, and circumpolar stars.

  Academic text (2005)

• Very precise astrometric measurements would show the centroid of a star executing an ellipse on the sky over the full period of a planet with sufficient pull.

  Academic text (2004)

• The result is two catalogs: the primary catalog, Hipparcos, lists 118,000 stars with milliarcsecond astrometric resolution and photometric precision of 0.2%.

  Academic text (1997)

• The auxiliary catalog, named Tycho in honor of the last great naked-eye astrometer, contains a million less-well-measured stars, with an astrometric resolution of 2.5 milliarcseconds and a photometric precision of 6%.

  Academic text (1997)

Surface Forms

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Etymology