astrometricadj.

Brit.

/ˌastrə(ʊ)ˈmɛtrɪk/, U.S.

/ˌæstrəˈmɛtrɪk/

Origin: Formed within English, by compounding. Etymons: astro- comb. form, -metric comb. form.

Etymology: < astro- comb. form + -metric comb. form, after astrometry n. Compare French astrométrique (1843).

Astronomy.

1. Of or relating to the measurement and analysis of the position, motion, or magnitude of celestial objects, esp. stars.

ΚΠ

1844 W. H. Smyth Cycle Celestial Objects II. 165 These are the astrometric results.

1885 Observatory July 242 Sir W. Herschel's astrometric researches consisted in the formation of numerous short sequences of only two or three stars in each.

1937 Astron. Jrnl. 46 85/1 These conclusions may be valuable in the planning of general astrometric work.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) I. 603/1 Interferometric methods provide limited astrometric data.

2001 D. Weldrake in P. Moore 2002 Yearbk. Astron. ii. 180 The planets themselves are far too small and faint to be directly imaged, at least with current technology, and their presence is inferred from astrometric studies of the star itself.

2. Designating a binary system in which one of the two objects is too faint or too close to the other to be observed directly, and is recognized only by its effect on the motion of its brighter partner; designating a component of such a system. Chiefly in astrometric binary, astrometric companion.

ΚΠ

1944 Proc. Amer. Philos. Soc. 88 374/2 As to the newly discovered astrometric binaries, the periods, shorter that for any known visual binary, need not cause surprise.

1971 Nature 27 Aug. 611/1 Because objects with M ≲ 0.1M_☉ never burn hydrogen, they are almost undetectable except as astrometric companions to nearby dwarf stars.

1977 Sci. Amer. (U.K. ed.) Apr. 96/3 A star showing this kind of motion may be a member of a pair. A stellar system of this kind is called an astrometric double.

2005 J. Mullaney Double & Multiple Stars ii. 16 The relatively long time spans required for the discovery and subsequent study of astrometric binaries has caused many astronomers to leave the field.

This is a new entry (OED Third Edition, March 2012; most recently modified version published online December 2021).

单词	astrometric
释义	astrometricadj. Brit. /ˌastrə(ʊ)ˈmɛtrɪk/, U.S. /ˌæstrəˈmɛtrɪk/ Origin: Formed within English, by compounding. Etymons: astro- comb. form, -metric comb. form. Etymology: < astro- comb. form + -metric comb. form, after astrometry n. Compare French astrométrique (1843). Astronomy. 1. Of or relating to the measurement and analysis of the position, motion, or magnitude of celestial objects, esp. stars. ΚΠ 1844 W. H. Smyth Cycle Celestial Objects II. 165 These are the astrometric results. 1885 Observatory July 242 Sir W. Herschel's astrometric researches consisted in the formation of numerous short sequences of only two or three stars in each. 1937 Astron. Jrnl. 46 85/1 These conclusions may be valuable in the planning of general astrometric work. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) I. 603/1 Interferometric methods provide limited astrometric data. 2001 D. Weldrake in P. Moore 2002 Yearbk. Astron. ii. 180 The planets themselves are far too small and faint to be directly imaged, at least with current technology, and their presence is inferred from astrometric studies of the star itself. 2. Designating a binary system in which one of the two objects is too faint or too close to the other to be observed directly, and is recognized only by its effect on the motion of its brighter partner; designating a component of such a system. Chiefly in astrometric binary, astrometric companion. ΚΠ 1944 Proc. Amer. Philos. Soc. 88 374/2 As to the newly discovered astrometric binaries, the periods, shorter that for any known visual binary, need not cause surprise. 1971 Nature 27 Aug. 611/1 Because objects with M ≲ 0.1M_☉ never burn hydrogen, they are almost undetectable except as astrometric companions to nearby dwarf stars. 1977 Sci. Amer. (U.K. ed.) Apr. 96/3 A star showing this kind of motion may be a member of a pair. A stellar system of this kind is called an astrometric double. 2005 J. Mullaney Double & Multiple Stars ii. 16 The relatively long time spans required for the discovery and subsequent study of astrometric binaries has caused many astronomers to leave the field. This is a new entry (OED Third Edition, March 2012; most recently modified version published online December 2021). < adj.1844
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