Quadrantids


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Quadrantids

(kwod-ran -tidz) A major meteor shower, radiant: RA 232°, dec +50°, that maximizes on Jan. 3 when the Sun's longitude is 282.8°. The zenithal hourly rate (ZHR) at maximum is about 90 and is constant from year to year. The meteoroid stream is narrow, the ZHR being greater than half maximum for only 17 hours: the stream's cross-sectional diameter is about 1.7 million km compared with 20 million and 13 million km for those of the Perseids and Geminids. The stream has its ascending node close to the orbit of Jupiter. Owing to gravitational and radiational perturbations the large ‘visual’ meteoroids are in a slightly different orbit to the smaller ‘radio’ meteoroids. The shower is thought to be associated with comet Machholz. It is named after the obsolete constellation Quadrans Murali found in early 19th-century star atlases. The radiant is actually in Boötes.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Quadrantids

 

a meteor shower with a radiant on the boundary between the constellations Bootes and Draco (on star maps in the early 19th century this region was designated by the constellation Qudrans Muralis). The Quadrantids have been known since 1839. They are observed annually at the end of December and in the beginning of January; on January 3–4, the earth passes through the dense central concentration of the Quadrantid meteor swarm in less than 24 hr. The Quadrantid meteor shower is one of the more active showers.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

Quadrantids

[kwä′dran·tidz]
(astronomy)
A meteor shower whose radiant-right ascension of 15 hours and declination of +48° is in the constellation Boötes; velocity is 27 miles (43 kilometers) per second, and the strength is medium.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
The radiant point of the Quadrantids can be found in an approximate right angle with the handle-end of the Big Dipper and Bootes' star Arcturus.
The Quadrantids is an "above average" meteor shower, producing up to 120, 41km per second meteors an hour, and originating from a former constellation called Quadrans Muralis.
Bashir Marzouq, an astronomer at Qatar Calendar House (QCH), said in a statement that the Quadrantids Meteor Showers are very distinctive because of its very high fall rate in the peak which reaches 80 meteors per hour.
According to Discovery Channel, quadrantids produce up to 40 meteors or falling stars per hour, and that it is just among the more than 100 tons of materials from asteroids and comets that fall into the earth every day - some destroyed by friction while some survive and pass through the atmosphere to become falling stars that are visible to human eyes.
The Quadrantid shower in January is also strong, but very brief.
Quadrantids, which are known for producing lots of bright fireballs in the night sky, visits every New Year, Cnet reported.
MY diary tells me to look out for the Quadrantids meteor shower but I am quite pushed timewise, could you pop out and do it for me?
The Quadrantids, another under-observed shower, are active from January 01 to 06 with a peak on Jan 03.
The next chance for a good show may be the Quadrantids in early January 2014.
The Quadrantids Metor Shower is classed as an above average shower, not as spectacular as last month's.
The Quadrantids are a major shower, Al-Saadoon told KUNA, adding that they
You'll get a crash course in three of this coming January's unusual astronomical events, from a partial solar eclipse, the Quadrantids Meteor Shower and Jupiter aligning with Uranus.