periastern.

Brit.

/ˌpɛrɪˈastə/, U.S.

/ˌpɛriˈæstər/

Forms: 1800s periastre, 1800s– periaster.

Origin: A borrowing from Greek, combined with an English element. Etymons: peri- prefix, Greek ἀστήρ.

Etymology: < peri- prefix + ancient Greek ἀστήρ star (see aster n.), after perigee n., perihelion n., etc. Compare French périastre (1899 or earlier). Compare later periastron n.

Astronomy. rare.

= periastron n.

ΘΚΠ

the world > the universe > heavenly body > movement of heavenly bodies > [noun] > movement in orbit > orbit > parts of orbit

aphelion1656

perihelion1666

vector1704

elongation1708

orb1733

periaster1851

orbitale1901

Lagrangian point1962

1851 J. P. Nichol Archit. Heavens (ed. 9) 223 The swiftness with which certain individuals of the Double Stars sweep past their perihelia,—or rather their periasters—is amazing.

1877 G. F. Chambers Handbk. Descr. Astron. (ed. 3) 918 Periastre.

2005 www.busoc.be 17 Feb. (O.E.D. Archive) The first gravity field observations will be performed at the periaster of 28 February and will be repeated at all following periasters.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	periaster
释义	periastern. Brit. /ˌpɛrɪˈastə/, U.S. /ˌpɛriˈæstər/ Forms: 1800s periastre, 1800s– periaster. Origin: A borrowing from Greek, combined with an English element. Etymons: peri- prefix, Greek ἀστήρ. Etymology: < peri- prefix + ancient Greek ἀστήρ star (see aster n.), after perigee n., perihelion n., etc. Compare French périastre (1899 or earlier). Compare later periastron n. Astronomy. rare. = periastron n. ΘΚΠ the world > the universe > heavenly body > movement of heavenly bodies > [noun] > movement in orbit > orbit > parts of orbit aphelion1656 perihelion1666 vector1704 elongation1708 orb1733 periaster1851 orbitale1901 Lagrangian point1962 1851 J. P. Nichol Archit. Heavens (ed. 9) 223 The swiftness with which certain individuals of the Double Stars sweep past their perihelia,—or rather their periasters—is amazing. 1877 G. F. Chambers Handbk. Descr. Astron. (ed. 3) 918 Periastre. 2005 www.busoc.be 17 Feb. (O.E.D. Archive) The first gravity field observations will be performed at the periaster of 28 February and will be repeated at all following periasters. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.1851
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