asterism

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asterism

A prominent grouping of stars forming a distinctive shape but not a complete or recognized constellation. The Plough is an asterism within the constellation Ursa Major. Other examples of asterisms are the Sickle in Leo, the False Cross and the Summer Triangle.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

asterism

[′as·tə‚riz·əm]
(astronomy)
A constellation or small group of stars.
(optics)
A starlike optical phenomenon seen in gemstones called star stones; due to reflection of light by lustrous inclusions reduced to sharp lines of light by a domed cabochon style of cutting.
(spectroscopy)
A star-shaped pattern sometimes seen in x-ray spectrophotographs.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Because opposing asterisms can only be found with the help of circumpolar stars, which are always in the sky.
The very center of the Purple Tenuity Enclosure is said to be the North Pole asterism. The fifth star of the North Pole asterism is called 'Celestial Pivot' [TEXT NOT REPRODUCIBLE IN ASCII] and the place nearby which lacks stars is called the Vermilion Pole [TEXT NOT REPRODUCIBLE IN ASCII].
Close to Berkeley 62, you'll find the binocular asterism Eddie's Coaster, named for Eddie Carpenter, the longtime British observer who first noticed it.
The shape of the asterism reminds me in a way of a typical Japanese fan.
This includes the background of the folk astronomical lore in the whole text of Ibn Asim with an emphasis on the 28 anwa asterisms or "lunar stations" (pp.
Let's take a look at some of the asterisms that populate the sky at this time of the year, sticking to those that are noteworthy for the images they've evoked.
Both are embedded in a vaguely bat-shaped asterism of a half dozen fifth- and sixth-magnitude stars.
Object Type RA (J2000.0) Dec Streicher 51 Asterism 18h 10.4 -56[degrees]30' h: 5033 Multiple star 18h 15.4 -48[degrees]51' IC 4699 Planetary Neb.
The densest clump of visible galaxies forms a house-like shape not unlike the asterism that underlies the constellation Cepheus.
45), he comments that the Summer Triangle asterism wasn't popularized until a little more than 50 years ago and that the famous Teapot asterism of Sagittarius is even younger.
Asterisms are easy to recognize but aren't formally recognized as constellations.